Commit Graph

819 Commits

Author SHA1 Message Date
Paul Gortmaker 80da6a4fee asm-generic: add linux/types.h to cmpxchg.h
Builds of the openrisc or1ksim_defconfig show the following:

  In file included from arch/openrisc/include/generated/asm/cmpxchg.h:1:0,
                   from include/asm-generic/atomic.h:18,
                   from arch/openrisc/include/generated/asm/atomic.h:1,
                   from include/linux/atomic.h:4,
                   from include/linux/dcache.h:4,
                   from fs/notify/fsnotify.c:19:
  include/asm-generic/cmpxchg.h: In function '__xchg':
  include/asm-generic/cmpxchg.h:34:20: error: expected ')' before 'u8'
  include/asm-generic/cmpxchg.h:34:20: warning: type defaults to 'int' in type name

and many more lines of similar errors.  It seems specific to the or32
because most other platforms have an arch specific component that would
have already included types.h ahead of time, but the o32 does not.

Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Jonas Bonn <jonas@southpole.se>
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Acked-by: David Howells <dhowells@redhat.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2012-04-02 14:41:27 -07:00
Linus Torvalds a591afc01d Merge branch 'x86-x32-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x32 support for x86-64 from Ingo Molnar:
 "This tree introduces the X32 binary format and execution mode for x86:
  32-bit data space binaries using 64-bit instructions and 64-bit kernel
  syscalls.

  This allows applications whose working set fits into a 32 bits address
  space to make use of 64-bit instructions while using a 32-bit address
  space with shorter pointers, more compressed data structures, etc."

Fix up trivial context conflicts in arch/x86/{Kconfig,vdso/vma.c}

* 'x86-x32-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (71 commits)
  x32: Fix alignment fail in struct compat_siginfo
  x32: Fix stupid ia32/x32 inversion in the siginfo format
  x32: Add ptrace for x32
  x32: Switch to a 64-bit clock_t
  x32: Provide separate is_ia32_task() and is_x32_task() predicates
  x86, mtrr: Use explicit sizing and padding for the 64-bit ioctls
  x86/x32: Fix the binutils auto-detect
  x32: Warn and disable rather than error if binutils too old
  x32: Only clear TIF_X32 flag once
  x32: Make sure TS_COMPAT is cleared for x32 tasks
  fs: Remove missed ->fds_bits from cessation use of fd_set structs internally
  fs: Fix close_on_exec pointer in alloc_fdtable
  x32: Drop non-__vdso weak symbols from the x32 VDSO
  x32: Fix coding style violations in the x32 VDSO code
  x32: Add x32 VDSO support
  x32: Allow x32 to be configured
  x32: If configured, add x32 system calls to system call tables
  x32: Handle process creation
  x32: Signal-related system calls
  x86: Add #ifdef CONFIG_COMPAT to <asm/sys_ia32.h>
  ...
2012-03-29 18:12:23 -07:00
Linus Torvalds 50483c3268 Merge git://git.kernel.org/pub/scm/linux/kernel/git/cmetcalf/linux-tile
Pull arch/tile (really asm-generic) update from Chris Metcalf:
 "These are a couple of asm-generic changes that apply to tile."

* git://git.kernel.org/pub/scm/linux/kernel/git/cmetcalf/linux-tile:
  compat: use sys_sendfile64() implementation for sendfile syscall
  [PATCH v3] ipc: provide generic compat versions of IPC syscalls
2012-03-29 14:49:45 -07:00
Linus Torvalds 0195c00244 Disintegrate and delete asm/system.h
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Merge tag 'split-asm_system_h-for-linus-20120328' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-asm_system

Pull "Disintegrate and delete asm/system.h" from David Howells:
 "Here are a bunch of patches to disintegrate asm/system.h into a set of
  separate bits to relieve the problem of circular inclusion
  dependencies.

  I've built all the working defconfigs from all the arches that I can
  and made sure that they don't break.

  The reason for these patches is that I recently encountered a circular
  dependency problem that came about when I produced some patches to
  optimise get_order() by rewriting it to use ilog2().

  This uses bitops - and on the SH arch asm/bitops.h drags in
  asm-generic/get_order.h by a circuituous route involving asm/system.h.

  The main difficulty seems to be asm/system.h.  It holds a number of
  low level bits with no/few dependencies that are commonly used (eg.
  memory barriers) and a number of bits with more dependencies that
  aren't used in many places (eg.  switch_to()).

  These patches break asm/system.h up into the following core pieces:

    (1) asm/barrier.h

        Move memory barriers here.  This already done for MIPS and Alpha.

    (2) asm/switch_to.h

        Move switch_to() and related stuff here.

    (3) asm/exec.h

        Move arch_align_stack() here.  Other process execution related bits
        could perhaps go here from asm/processor.h.

    (4) asm/cmpxchg.h

        Move xchg() and cmpxchg() here as they're full word atomic ops and
        frequently used by atomic_xchg() and atomic_cmpxchg().

    (5) asm/bug.h

        Move die() and related bits.

    (6) asm/auxvec.h

        Move AT_VECTOR_SIZE_ARCH here.

  Other arch headers are created as needed on a per-arch basis."

Fixed up some conflicts from other header file cleanups and moving code
around that has happened in the meantime, so David's testing is somewhat
weakened by that.  We'll find out anything that got broken and fix it..

* tag 'split-asm_system_h-for-linus-20120328' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-asm_system: (38 commits)
  Delete all instances of asm/system.h
  Remove all #inclusions of asm/system.h
  Add #includes needed to permit the removal of asm/system.h
  Move all declarations of free_initmem() to linux/mm.h
  Disintegrate asm/system.h for OpenRISC
  Split arch_align_stack() out from asm-generic/system.h
  Split the switch_to() wrapper out of asm-generic/system.h
  Move the asm-generic/system.h xchg() implementation to asm-generic/cmpxchg.h
  Create asm-generic/barrier.h
  Make asm-generic/cmpxchg.h #include asm-generic/cmpxchg-local.h
  Disintegrate asm/system.h for Xtensa
  Disintegrate asm/system.h for Unicore32 [based on ver #3, changed by gxt]
  Disintegrate asm/system.h for Tile
  Disintegrate asm/system.h for Sparc
  Disintegrate asm/system.h for SH
  Disintegrate asm/system.h for Score
  Disintegrate asm/system.h for S390
  Disintegrate asm/system.h for PowerPC
  Disintegrate asm/system.h for PA-RISC
  Disintegrate asm/system.h for MN10300
  ...
2012-03-28 15:58:21 -07:00
Linus Torvalds d25413efa9 Merge git://github.com/rustyrussell/linux
Pull module and param updates from Rusty Russell:
 "I'm getting married next week, and then honeymoon until 6th May.  I'll
  be offline from next week, except to post the compulsory pictures if
  Alex shaves her head..."

I'm sure Rusty can take time off from his honeymoon if something comes
up. And here's the explanation about head shaving:

	http://baldalex.org/

in case you wondered and wanted to support another insane caper or
Rusty's involving shaving.

What *is* it with Rusty and shaving, anyway?

* git://github.com/rustyrussell/linux:
  module: Remove module size limit
  module: move __module_get and try_module_get() out of line.
  params: <level>_initcall-like kernel parameters
  module_param: remove support for bool parameters which are really int.
  module: add kernel param to force disable module load
2012-03-28 14:27:09 -07:00
Linus Torvalds 7bf97e1d5a GPIO changes for v3.4
Primarily gpio device driver changes with some minor side effects
 under arch/arm and arch/x86.  Also includes a few core changes such as
 explicitly supporting (electrical) open source and open drain outputs
 and some help for parsing gpio devicetree properties.
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Merge tag 'gpio-for-linus' of git://git.secretlab.ca/git/linux-2.6

Pull GPIO changes for v3.4 from Grant Likely:
 "Primarily gpio device driver changes with some minor side effects
  under arch/arm and arch/x86.  Also includes a few core changes such as
  explicitly supporting (electrical) open source and open drain outputs
  and some help for parsing gpio devicetree properties."

Fix up context conflict due to Laxman Dewangan adding sleep control for
the tps65910 driver separately for gpio's and regulators.

* tag 'gpio-for-linus' of git://git.secretlab.ca/git/linux-2.6: (34 commits)
  gpio/ep93xx: Remove unused inline function and useless pr_err message
  gpio/sodaville: Mark broken due to core irqdomain migration
  gpio/omap: fix redundant decoding of gpio offset
  gpio/omap: fix incorrect update to context.irqenable1
  gpio/omap: fix incorrect context restore logic in omap_gpio_runtime_*
  gpio/omap: fix missing dataout context save in _set_gpio_dataout_reg
  gpio/omap: fix _set_gpio_irqenable implementation
  gpio/omap: fix trigger type to unsigned
  gpio/omap: fix wakeup_en register update in _set_gpio_wakeup()
  gpio: tegra: tegra_gpio_config shouldn't be __init
  gpio/davinci: fix enabling unbanked GPIO IRQs
  gpio/davinci: fix oops on unbanked gpio irq request
  gpio/omap: Fix section warning for omap_mpuio_alloc_gc()
  ARM: tegra: export tegra_gpio_{en,dis}able
  gpio/gpio-stmpe: Fix the value returned by _get_value routine
  Documentation/gpio.txt: Explain expected pinctrl interaction
  GPIO: LPC32xx: Add output reading to GPO P3
  GPIO: LPC32xx: Fix missing bit selection mask
  gpio/omap: fix wakeups on level-triggered GPIOs
  gpio/omap: Fix IRQ handling for SPARSE_IRQ
  ...
2012-03-28 14:08:46 -07:00
David Howells 141124c020 Delete all instances of asm/system.h
Delete all instances of asm/system.h as they should be redundant by this
point.

Signed-off-by: David Howells <dhowells@redhat.com>
2012-03-28 18:30:03 +01:00
David Howells 9ffc93f203 Remove all #inclusions of asm/system.h
Remove all #inclusions of asm/system.h preparatory to splitting and killing
it.  Performed with the following command:

perl -p -i -e 's!^#\s*include\s*<asm/system[.]h>.*\n!!' `grep -Irl '^#\s*include\s*<asm/system[.]h>' *`

Signed-off-by: David Howells <dhowells@redhat.com>
2012-03-28 18:30:03 +01:00
David Howells 96f951edb1 Add #includes needed to permit the removal of asm/system.h
asm/system.h is a cause of circular dependency problems because it contains
commonly used primitive stuff like barrier definitions and uncommonly used
stuff like switch_to() that might require MMU definitions.

asm/system.h has been disintegrated by this point on all arches into the
following common segments:

 (1) asm/barrier.h

     Moved memory barrier definitions here.

 (2) asm/cmpxchg.h

     Moved xchg() and cmpxchg() here.  #included in asm/atomic.h.

 (3) asm/bug.h

     Moved die() and similar here.

 (4) asm/exec.h

     Moved arch_align_stack() here.

 (5) asm/elf.h

     Moved AT_VECTOR_SIZE_ARCH here.

 (6) asm/switch_to.h

     Moved switch_to() here.

Signed-off-by: David Howells <dhowells@redhat.com>
2012-03-28 18:30:03 +01:00
David Howells 5d1250660a Split arch_align_stack() out from asm-generic/system.h
Split arch_align_stack() out from asm-generic/system.h into its own header of
asm-generic/exec.h as part of the asm/system.h disintegration.

Signed-off-by: David Howells <dhowells@redhat.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
2012-03-28 18:30:03 +01:00
David Howells 158bc507c2 Split the switch_to() wrapper out of asm-generic/system.h
Split the switch_to() wrapper out of asm-generic/system.h into its own
asm-generic/system.h as part of the asm/system.h disintegration.

Signed-off-by: David Howells <dhowells@redhat.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
2012-03-28 18:30:03 +01:00
David Howells b4816afa39 Move the asm-generic/system.h xchg() implementation to asm-generic/cmpxchg.h
Move the asm-generic/system.h xchg() implementation to asm-generic/cmpxchg.h
to simplify disintegration of asm/system.h.

Signed-off-by: David Howells <dhowells@redhat.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
2012-03-28 18:30:03 +01:00
David Howells 885df91ca3 Create asm-generic/barrier.h
Create asm-generic/barrier.h and move the barrier definitions from
asm-generic/system.h to it.

Signed-off-by: David Howells <dhowells@redhat.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
2012-03-28 18:30:03 +01:00
David Howells 34484277b1 Make asm-generic/cmpxchg.h #include asm-generic/cmpxchg-local.h
Make asm-generic/cmpxchg.h #include asm-generic/cmpxchg-local.h as all arch
files that #include the former also #include the latter.  See:

	grep -rl asm-generic/cmpxchg-local[.]h arch/ | sort > b
	grep -rl asm-generic/cmpxchg[.]h arch/ | sort > a
	comm a b

This simplifies the disintegration of asm-generic/system.h for arches that
don't have their own.

Signed-off-by: David Howells <dhowells@redhat.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
2012-03-28 18:30:03 +01:00
Chris Metcalf 1631fcea83 compat: use sys_sendfile64() implementation for sendfile syscall
<asm-generic/unistd.h> was set up to use sys_sendfile() for the 32-bit
compat API instead of sys_sendfile64(), but in fact the right thing to
do is to use sys_sendfile64() in all cases.  The 32-bit sendfile64() API
in glibc uses the sendfile64 syscall, so it has to be capable of doing
full 64-bit operations.  But the sys_sendfile() kernel implementation
has a MAX_NON_LFS test in it which explicitly limits the offset to 2^32.
So, we need to use the sys_sendfile64() implementation in the kernel
for this case.

Cc: <stable@kernel.org>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
2012-03-27 13:36:57 -04:00
Pawel Moll 026cee0086 params: <level>_initcall-like kernel parameters
This patch adds a set of macros that can be used to declare
kernel parameters to be parsed _before_ initcalls at a chosen
level are executed.  We rename the now-unused "flags" field of
struct kernel_param as the level.  It's signed, for when we
use this for early params as well, in future.

Linker macro collating init calls had to be modified in order
to add additional symbols between levels that are later used
by the init code to split the calls into blocks.

Signed-off-by: Pawel Moll <pawel.moll@arm.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
2012-03-26 12:50:51 +10:30
Linus Torvalds ed2d265d12 The following text was taken from the original review request:
"[RFC - PATCH 0/7] consolidation of BUG support code."
 		https://lkml.org/lkml/2012/1/26/525
 --
 
 The changes shown here are to unify linux's BUG support under
 the one <linux/bug.h> file.  Due to historical reasons, we have
 some BUG code in bug.h and some in kernel.h -- i.e. the support for
 BUILD_BUG in linux/kernel.h predates the addition of linux/bug.h,
 but old code in kernel.h wasn't moved to bug.h at that time.  As
 a band-aid, kernel.h was including <asm/bug.h> to pseudo link them.
 
 This has caused confusion[1] and general yuck/WTF[2] reactions.
 Here is an example that violates the principle of least surprise:
 
       CC      lib/string.o
       lib/string.c: In function 'strlcat':
       lib/string.c:225:2: error: implicit declaration of function 'BUILD_BUG_ON'
       make[2]: *** [lib/string.o] Error 1
       $
       $ grep linux/bug.h lib/string.c
       #include <linux/bug.h>
       $
 
 We've included <linux/bug.h> for the BUG infrastructure and yet we
 still get a compile fail!  [We've not kernel.h for BUILD_BUG_ON.]
 Ugh - very confusing for someone who is new to kernel development.
 
 With the above in mind, the goals of this changeset are:
 
 1) find and fix any include/*.h files that were relying on the
    implicit presence of BUG code.
 2) find and fix any C files that were consuming kernel.h and
    hence relying on implicitly getting some/all BUG code.
 3) Move the BUG related code living in kernel.h to <linux/bug.h>
 4) remove the asm/bug.h from kernel.h to finally break the chain.
 
 During development, the order was more like 3-4, build-test, 1-2.
 But to ensure that git history for bisect doesn't get needless
 build failures introduced, the commits have been reorderd to fix
 the problem areas in advance.
 
 [1]  https://lkml.org/lkml/2012/1/3/90
 [2]  https://lkml.org/lkml/2012/1/17/414
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Merge tag 'bug-for-3.4' of git://git.kernel.org/pub/scm/linux/kernel/git/paulg/linux

Pull <linux/bug.h> cleanup from Paul Gortmaker:
 "The changes shown here are to unify linux's BUG support under the one
  <linux/bug.h> file.  Due to historical reasons, we have some BUG code
  in bug.h and some in kernel.h -- i.e.  the support for BUILD_BUG in
  linux/kernel.h predates the addition of linux/bug.h, but old code in
  kernel.h wasn't moved to bug.h at that time.  As a band-aid, kernel.h
  was including <asm/bug.h> to pseudo link them.

  This has caused confusion[1] and general yuck/WTF[2] reactions.  Here
  is an example that violates the principle of least surprise:

      CC      lib/string.o
      lib/string.c: In function 'strlcat':
      lib/string.c:225:2: error: implicit declaration of function 'BUILD_BUG_ON'
      make[2]: *** [lib/string.o] Error 1
      $
      $ grep linux/bug.h lib/string.c
      #include <linux/bug.h>
      $

  We've included <linux/bug.h> for the BUG infrastructure and yet we
  still get a compile fail! [We've not kernel.h for BUILD_BUG_ON.] Ugh -
  very confusing for someone who is new to kernel development.

  With the above in mind, the goals of this changeset are:

  1) find and fix any include/*.h files that were relying on the
     implicit presence of BUG code.
  2) find and fix any C files that were consuming kernel.h and hence
     relying on implicitly getting some/all BUG code.
  3) Move the BUG related code living in kernel.h to <linux/bug.h>
  4) remove the asm/bug.h from kernel.h to finally break the chain.

  During development, the order was more like 3-4, build-test, 1-2.  But
  to ensure that git history for bisect doesn't get needless build
  failures introduced, the commits have been reorderd to fix the problem
  areas in advance.

	[1]  https://lkml.org/lkml/2012/1/3/90
	[2]  https://lkml.org/lkml/2012/1/17/414"

Fix up conflicts (new radeon file, reiserfs header cleanups) as per Paul
and linux-next.

* tag 'bug-for-3.4' of git://git.kernel.org/pub/scm/linux/kernel/git/paulg/linux:
  kernel.h: doesn't explicitly use bug.h, so don't include it.
  bug: consolidate BUILD_BUG_ON with other bug code
  BUG: headers with BUG/BUG_ON etc. need linux/bug.h
  bug.h: add include of it to various implicit C users
  lib: fix implicit users of kernel.h for TAINT_WARN
  spinlock: macroize assert_spin_locked to avoid bug.h dependency
  x86: relocate get/set debugreg fcns to include/asm/debugreg.
2012-03-24 10:08:39 -07:00
Linus Torvalds 8e3ade251b Merge branch 'akpm' (Andrew's patch-bomb)
Merge second batch of patches from Andrew Morton:
 - various misc things
 - core kernel changes to prctl, exit, exec, init, etc.
 - kernel/watchdog.c updates
 - get_maintainer
 - MAINTAINERS
 - the backlight driver queue
 - core bitops code cleanups
 - the led driver queue
 - some core prio_tree work
 - checkpatch udpates
 - largeish crc32 update
 - a new poll() feature for the v4l guys
 - the rtc driver queue
 - fatfs
 - ptrace
 - signals
 - kmod/usermodehelper updates
 - coredump
 - procfs updates

* emailed from Andrew Morton <akpm@linux-foundation.org>: (141 commits)
  seq_file: add seq_set_overflow(), seq_overflow()
  proc-ns: use d_set_d_op() API to set dentry ops in proc_ns_instantiate().
  procfs: speed up /proc/pid/stat, statm
  procfs: add num_to_str() to speed up /proc/stat
  proc: speed up /proc/stat handling
  fs/proc/kcore.c: make get_sparsemem_vmemmap_info() static
  coredump: add VM_NODUMP, MADV_NODUMP, MADV_CLEAR_NODUMP
  coredump: remove VM_ALWAYSDUMP flag
  kmod: make __request_module() killable
  kmod: introduce call_modprobe() helper
  usermodehelper: ____call_usermodehelper() doesn't need do_exit()
  usermodehelper: kill umh_wait, renumber UMH_* constants
  usermodehelper: implement UMH_KILLABLE
  usermodehelper: introduce umh_complete(sub_info)
  usermodehelper: use UMH_WAIT_PROC consistently
  signal: zap_pid_ns_processes: s/SEND_SIG_NOINFO/SEND_SIG_FORCED/
  signal: oom_kill_task: use SEND_SIG_FORCED instead of force_sig()
  signal: cosmetic, s/from_ancestor_ns/force/ in prepare_signal() paths
  signal: give SEND_SIG_FORCED more power to beat SIGNAL_UNKILLABLE
  Hexagon: use set_current_blocked() and block_sigmask()
  ...
2012-03-23 16:59:10 -07:00
Jason Baron accb61fe7b coredump: add VM_NODUMP, MADV_NODUMP, MADV_CLEAR_NODUMP
Since we no longer need the VM_ALWAYSDUMP flag, let's use the freed bit
for 'VM_NODUMP' flag.  The idea is is to add a new madvise() flag:
MADV_DONTDUMP, which can be set by applications to specifically request
memory regions which should not dump core.

The specific application I have in mind is qemu: we can add a flag there
that wouldn't dump all of guest memory when qemu dumps core.  This flag
might also be useful for security sensitive apps that want to absolutely
make sure that parts of memory are not dumped.  To clear the flag use:
MADV_DODUMP.

[akpm@linux-foundation.org: s/MADV_NODUMP/MADV_DONTDUMP/, s/MADV_CLEAR_NODUMP/MADV_DODUMP/, per Roland]
[akpm@linux-foundation.org: fix up the architectures which broke]
Signed-off-by: Jason Baron <jbaron@redhat.com>
Acked-by: Roland McGrath <roland@hack.frob.com>
Cc: Chris Metcalf <cmetcalf@tilera.com>
Cc: Avi Kivity <avi@redhat.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Richard Henderson <rth@twiddle.net>
Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Cc: Matt Turner <mattst88@gmail.com>
Cc: "James E.J. Bottomley" <jejb@parisc-linux.org>
Cc: Helge Deller <deller@gmx.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2012-03-23 16:58:42 -07:00
Jan Beulich 7ccaba5314 consolidate WARN_...ONCE() static variables
Due to the alignment of following variables, these typically consume
more than just the single byte that 'bool' requires, and as there are a
few hundred instances, the cache pollution (not so much the waste of
memory) sums up.  Put these variables into their own section, outside of
any half way frequently used memory range.

Do the same also to the __warned variable of rcu_lockdep_assert().
(Don't, however, include the ones used by printk_once() and alike, as
they can potentially be hot.)

Signed-off-by: Jan Beulich <jbeulich@suse.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2012-03-23 16:58:31 -07:00
Linus Torvalds 475c77edf8 Merge branch 'linux-next' of git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci
Pull PCI changes (including maintainer change) from Jesse Barnes:
 "This pull has some good cleanups from Bjorn and Yinghai, as well as
  some more code from Yinghai to better handle resource re-allocation
  when enabled.

  There's also a new initcall_debug feature from Arjan which will print
  out quirk timing information to help identify slow quirks for fixing
  or refinement (Yinghai sent in a few patches to do just that once the
  new debug code landed).

  Beyond that, I'm handing off PCI maintainership to Bjorn Helgaas.
  He's been a core PCI and Linux contributor for some time now, and has
  kindly volunteered to take over.  I just don't feel I have the time
  for PCI review and work that it deserves lately (I've taken on some
  other projects), and haven't been as responsive lately as I'd like, so
  I approached Bjorn asking if he'd like to manage things.  He's going
  to give it a try, and I'm confident he'll do at least as well as I
  have in keeping the tree managed, patches flowing, and keeping things
  stable."

Fix up some fairly trivial conflicts due to other cleanups (mips device
resource fixup cleanups clashing with list handling cleanup, ppc iseries
removal clashing with pci_probe_only cleanup etc)

* 'linux-next' of git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci: (112 commits)
  PCI: Bjorn gets PCI hotplug too
  PCI: hand PCI maintenance over to Bjorn Helgaas
  unicore32/PCI: move <asm-generic/pci-bridge.h> include to asm/pci.h
  sparc/PCI: convert devtree and arch-probed bus addresses to resource
  powerpc/PCI: allow reallocation on PA Semi
  powerpc/PCI: convert devtree bus addresses to resource
  powerpc/PCI: compute I/O space bus-to-resource offset consistently
  arm/PCI: don't export pci_flags
  PCI: fix bridge I/O window bus-to-resource conversion
  x86/PCI: add spinlock held check to 'pcibios_fwaddrmap_lookup()'
  PCI / PCIe: Introduce command line option to disable ARI
  PCI: make acpihp use __pci_remove_bus_device instead
  PCI: export __pci_remove_bus_device
  PCI: Rename pci_remove_behind_bridge to pci_stop_and_remove_behind_bridge
  PCI: Rename pci_remove_bus_device to pci_stop_and_remove_bus_device
  PCI: print out PCI device info along with duration
  PCI: Move "pci reassigndev resource alignment" out of quirks.c
  PCI: Use class for quirk for usb host controller fixup
  PCI: Use class for quirk for ti816x class fixup
  PCI: Use class for quirk for intel e100 interrupt fixup
  ...
2012-03-23 14:02:12 -07:00
Linus Torvalds e17fdf5c67 Merge branch 'x86-asm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86/asm changes from Ingo Molnar

* 'x86-asm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86: Include probe_roms.h in probe_roms.c
  x86/32: Print control and debug registers for kerenel context
  x86: Tighten dependencies of CPU_SUP_*_32
  x86/numa: Improve internode cache alignment
  x86: Fix the NMI nesting comments
  x86-64: Improve insn scheduling in SAVE_ARGS_IRQ
  x86-64: Fix CFI annotations for NMI nesting code
  bitops: Add missing parentheses to new get_order macro
  bitops: Optimise get_order()
  bitops: Adjust the comment on get_order() to describe the size==0 case
  x86/spinlocks: Eliminate TICKET_MASK
  x86-64: Handle byte-wise tail copying in memcpy() without a loop
  x86-64: Fix memcpy() to support sizes of 4Gb and above
  x86-64: Fix memset() to support sizes of 4Gb and above
  x86-64: Slightly shorten copy_page()
2012-03-22 09:13:24 -07:00
Andrea Arcangeli 1a5a9906d4 mm: thp: fix pmd_bad() triggering in code paths holding mmap_sem read mode
In some cases it may happen that pmd_none_or_clear_bad() is called with
the mmap_sem hold in read mode.  In those cases the huge page faults can
allocate hugepmds under pmd_none_or_clear_bad() and that can trigger a
false positive from pmd_bad() that will not like to see a pmd
materializing as trans huge.

It's not khugepaged causing the problem, khugepaged holds the mmap_sem
in write mode (and all those sites must hold the mmap_sem in read mode
to prevent pagetables to go away from under them, during code review it
seems vm86 mode on 32bit kernels requires that too unless it's
restricted to 1 thread per process or UP builds).  The race is only with
the huge pagefaults that can convert a pmd_none() into a
pmd_trans_huge().

Effectively all these pmd_none_or_clear_bad() sites running with
mmap_sem in read mode are somewhat speculative with the page faults, and
the result is always undefined when they run simultaneously.  This is
probably why it wasn't common to run into this.  For example if the
madvise(MADV_DONTNEED) runs zap_page_range() shortly before the page
fault, the hugepage will not be zapped, if the page fault runs first it
will be zapped.

Altering pmd_bad() not to error out if it finds hugepmds won't be enough
to fix this, because zap_pmd_range would then proceed to call
zap_pte_range (which would be incorrect if the pmd become a
pmd_trans_huge()).

The simplest way to fix this is to read the pmd in the local stack
(regardless of what we read, no need of actual CPU barriers, only
compiler barrier needed), and be sure it is not changing under the code
that computes its value.  Even if the real pmd is changing under the
value we hold on the stack, we don't care.  If we actually end up in
zap_pte_range it means the pmd was not none already and it was not huge,
and it can't become huge from under us (khugepaged locking explained
above).

All we need is to enforce that there is no way anymore that in a code
path like below, pmd_trans_huge can be false, but pmd_none_or_clear_bad
can run into a hugepmd.  The overhead of a barrier() is just a compiler
tweak and should not be measurable (I only added it for THP builds).  I
don't exclude different compiler versions may have prevented the race
too by caching the value of *pmd on the stack (that hasn't been
verified, but it wouldn't be impossible considering
pmd_none_or_clear_bad, pmd_bad, pmd_trans_huge, pmd_none are all inlines
and there's no external function called in between pmd_trans_huge and
pmd_none_or_clear_bad).

		if (pmd_trans_huge(*pmd)) {
			if (next-addr != HPAGE_PMD_SIZE) {
				VM_BUG_ON(!rwsem_is_locked(&tlb->mm->mmap_sem));
				split_huge_page_pmd(vma->vm_mm, pmd);
			} else if (zap_huge_pmd(tlb, vma, pmd, addr))
				continue;
			/* fall through */
		}
		if (pmd_none_or_clear_bad(pmd))

Because this race condition could be exercised without special
privileges this was reported in CVE-2012-1179.

The race was identified and fully explained by Ulrich who debugged it.
I'm quoting his accurate explanation below, for reference.

====== start quote =======
      mapcount 0 page_mapcount 1
      kernel BUG at mm/huge_memory.c:1384!

    At some point prior to the panic, a "bad pmd ..." message similar to the
    following is logged on the console:

      mm/memory.c:145: bad pmd ffff8800376e1f98(80000000314000e7).

    The "bad pmd ..." message is logged by pmd_clear_bad() before it clears
    the page's PMD table entry.

        143 void pmd_clear_bad(pmd_t *pmd)
        144 {
    ->  145         pmd_ERROR(*pmd);
        146         pmd_clear(pmd);
        147 }

    After the PMD table entry has been cleared, there is an inconsistency
    between the actual number of PMD table entries that are mapping the page
    and the page's map count (_mapcount field in struct page). When the page
    is subsequently reclaimed, __split_huge_page() detects this inconsistency.

       1381         if (mapcount != page_mapcount(page))
       1382                 printk(KERN_ERR "mapcount %d page_mapcount %d\n",
       1383                        mapcount, page_mapcount(page));
    -> 1384         BUG_ON(mapcount != page_mapcount(page));

    The root cause of the problem is a race of two threads in a multithreaded
    process. Thread B incurs a page fault on a virtual address that has never
    been accessed (PMD entry is zero) while Thread A is executing an madvise()
    system call on a virtual address within the same 2 MB (huge page) range.

               virtual address space
              .---------------------.
              |                     |
              |                     |
            .-|---------------------|
            | |                     |
            | |                     |<-- B(fault)
            | |                     |
      2 MB  | |/////////////////////|-.
      huge <  |/////////////////////|  > A(range)
      page  | |/////////////////////|-'
            | |                     |
            | |                     |
            '-|---------------------|
              |                     |
              |                     |
              '---------------------'

    - Thread A is executing an madvise(..., MADV_DONTNEED) system call
      on the virtual address range "A(range)" shown in the picture.

    sys_madvise
      // Acquire the semaphore in shared mode.
      down_read(&current->mm->mmap_sem)
      ...
      madvise_vma
        switch (behavior)
        case MADV_DONTNEED:
             madvise_dontneed
               zap_page_range
                 unmap_vmas
                   unmap_page_range
                     zap_pud_range
                       zap_pmd_range
                         //
                         // Assume that this huge page has never been accessed.
                         // I.e. content of the PMD entry is zero (not mapped).
                         //
                         if (pmd_trans_huge(*pmd)) {
                             // We don't get here due to the above assumption.
                         }
                         //
                         // Assume that Thread B incurred a page fault and
             .---------> // sneaks in here as shown below.
             |           //
             |           if (pmd_none_or_clear_bad(pmd))
             |               {
             |                 if (unlikely(pmd_bad(*pmd)))
             |                     pmd_clear_bad
             |                     {
             |                       pmd_ERROR
             |                         // Log "bad pmd ..." message here.
             |                       pmd_clear
             |                         // Clear the page's PMD entry.
             |                         // Thread B incremented the map count
             |                         // in page_add_new_anon_rmap(), but
             |                         // now the page is no longer mapped
             |                         // by a PMD entry (-> inconsistency).
             |                     }
             |               }
             |
             v
    - Thread B is handling a page fault on virtual address "B(fault)" shown
      in the picture.

    ...
    do_page_fault
      __do_page_fault
        // Acquire the semaphore in shared mode.
        down_read_trylock(&mm->mmap_sem)
        ...
        handle_mm_fault
          if (pmd_none(*pmd) && transparent_hugepage_enabled(vma))
              // We get here due to the above assumption (PMD entry is zero).
              do_huge_pmd_anonymous_page
                alloc_hugepage_vma
                  // Allocate a new transparent huge page here.
                ...
                __do_huge_pmd_anonymous_page
                  ...
                  spin_lock(&mm->page_table_lock)
                  ...
                  page_add_new_anon_rmap
                    // Here we increment the page's map count (starts at -1).
                    atomic_set(&page->_mapcount, 0)
                  set_pmd_at
                    // Here we set the page's PMD entry which will be cleared
                    // when Thread A calls pmd_clear_bad().
                  ...
                  spin_unlock(&mm->page_table_lock)

    The mmap_sem does not prevent the race because both threads are acquiring
    it in shared mode (down_read).  Thread B holds the page_table_lock while
    the page's map count and PMD table entry are updated.  However, Thread A
    does not synchronize on that lock.

====== end quote =======

[akpm@linux-foundation.org: checkpatch fixes]
Reported-by: Ulrich Obergfell <uobergfe@redhat.com>
Signed-off-by: Andrea Arcangeli <aarcange@redhat.com>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Hugh Dickins <hughd@google.com>
Cc: Dave Jones <davej@redhat.com>
Acked-by: Larry Woodman <lwoodman@redhat.com>
Acked-by: Rik van Riel <riel@redhat.com>
Cc: <stable@vger.kernel.org>		[2.6.38+]
Cc: Mark Salter <msalter@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2012-03-21 17:54:54 -07:00
Grant Likely e2aa417726 Linux 3.3-rc7
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Merge tag 'v3.3-rc7' into gpio/next

Linux 3.3-rc7.  Merged into the gpio branch to pick up gpio bugfixes already
in mainline before queueing up move v3.4 patches
2012-03-12 09:41:28 -06:00
David S. Miller f6a1ad4295 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Conflicts:
	drivers/net/vmxnet3/vmxnet3_drv.c

Small vmxnet3 conflict with header size bug fix in 'net'.

Signed-off-by: David S. Miller <davem@davemloft.net>
2012-03-05 21:16:26 -05:00
Paul Gortmaker 187f1882b5 BUG: headers with BUG/BUG_ON etc. need linux/bug.h
If a header file is making use of BUG, BUG_ON, BUILD_BUG_ON, or any
other BUG variant in a static inline (i.e. not in a #define) then
that header really should be including <linux/bug.h> and not just
expecting it to be implicitly present.

We can make this change risk-free, since if the files using these
headers didn't have exposure to linux/bug.h already, they would have
been causing compile failures/warnings.

Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
2012-03-04 17:54:34 -05:00
Grant Likely 6e2cf65140 gpio: constify the data parameter to gpiochip_find()
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2012-03-02 15:56:03 -07:00
Ingo Molnar 458ce2910a Merge branch 'linus' into x86/asm
Sync up the latest NMI fixes.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
2012-02-28 10:27:36 +01:00
James Bottomley 97a29d59fc [PARISC] fix compile break caused by iomap: make IOPORT/PCI mapping functions conditional
The problem in

commit fea80311a9
Author: Randy Dunlap <rdunlap@xenotime.net>
Date:   Sun Jul 24 11:39:14 2011 -0700

    iomap: make IOPORT/PCI mapping functions conditional

is that if your architecture supplies pci_iomap/pci_iounmap, it expects
always to supply them.  Adding empty body defitions in the !CONFIG_PCI
case, which is what this patch does, breaks the parisc compile because
the functions become doubly defined.  It took us a while to spot this,
because we don't actually build !CONFIG_PCI very often (only if someone
is brave enough to test the snake/asp machines).

Since the note in the commit log says this is to fix a
CONFIG_GENERIC_IOMAP issue (which it does because CONFIG_GENERIC_IOMAP
supplies pci_iounmap only if CONFIG_PCI is set), there should actually
have been a condition upon this.  This should make sure no other
architecture's !CONFIG_PCI compile breaks in the same way as parisc.

The fix had to be updated to take account of the GENERIC_PCI_IOMAP
separation.

Reported-by: Rolf Eike Beer <eike@sf-mail.de>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
2012-02-27 09:43:30 -06:00
David S. Miller ff4783ce78 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Conflicts:
	drivers/net/ethernet/sfc/rx.c

Overlapping changes in drivers/net/ethernet/sfc/rx.c, one to change
the rx_buf->is_page boolean into a set of u16 flags, and another to
adjust how ->ip_summed is initialized.

Signed-off-by: David S. Miller <davem@davemloft.net>
2012-02-26 21:55:51 -05:00
Oleg Nesterov d80e731eca epoll: introduce POLLFREE to flush ->signalfd_wqh before kfree()
This patch is intentionally incomplete to simplify the review.
It ignores ep_unregister_pollwait() which plays with the same wqh.
See the next change.

epoll assumes that the EPOLL_CTL_ADD'ed file controls everything
f_op->poll() needs. In particular it assumes that the wait queue
can't go away until eventpoll_release(). This is not true in case
of signalfd, the task which does EPOLL_CTL_ADD uses its ->sighand
which is not connected to the file.

This patch adds the special event, POLLFREE, currently only for
epoll. It expects that init_poll_funcptr()'ed hook should do the
necessary cleanup. Perhaps it should be defined as EPOLLFREE in
eventpoll.

__cleanup_sighand() is changed to do wake_up_poll(POLLFREE) if
->signalfd_wqh is not empty, we add the new signalfd_cleanup()
helper.

ep_poll_callback(POLLFREE) simply does list_del_init(task_list).
This make this poll entry inconsistent, but we don't care. If you
share epoll fd which contains our sigfd with another process you
should blame yourself. signalfd is "really special". I simply do
not know how we can define the "right" semantics if it used with
epoll.

The main problem is, epoll calls signalfd_poll() once to establish
the connection with the wait queue, after that signalfd_poll(NULL)
returns the different/inconsistent results depending on who does
EPOLL_CTL_MOD/signalfd_read/etc. IOW: apart from sigmask, signalfd
has nothing to do with the file, it works with the current thread.

In short: this patch is the hack which tries to fix the symptoms.
It also assumes that nobody can take tasklist_lock under epoll
locks, this seems to be true.

Note:

	- we do not have wake_up_all_poll() but wake_up_poll()
	  is fine, poll/epoll doesn't use WQ_FLAG_EXCLUSIVE.

	- signalfd_cleanup() uses POLLHUP along with POLLFREE,
	  we need a couple of simple changes in eventpoll.c to
	  make sure it can't be "lost".

Reported-by: Maxime Bizon <mbizon@freebox.fr>
Cc: <stable@kernel.org>
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2012-02-24 11:42:50 -08:00
Joerg Roedel b893485db9 bitops: Add missing parentheses to new get_order macro
The new get_order macro introcuded in commit

	d66acc39c7

does not use parentheses around all uses of the parameter n.
This causes new compile warnings, for example in the
amd_iommu_init.c function:

drivers/iommu/amd_iommu_init.c:561:6: warning: suggest parentheses around comparison in operand of ‘&’ [-Wparentheses]
drivers/iommu/amd_iommu_init.c:561:6: warning: suggest parentheses around comparison in operand of ‘&’ [-Wparentheses]

Fix those warnings by adding the missing parentheses.

Reported-by: Ingo Molnar <mingo@elte.hu>
Cc: David Howells <dhowells@redhat.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Link: http://lkml.kernel.org/r/1330088295-28732-1-git-send-email-joerg.roedel@amd.com
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
2012-02-24 10:39:27 -08:00
Ben Greear 3bdc0eba0b net: Add framework to allow sending packets with customized CRC.
This is useful for testing RX handling of frames with bad
CRCs.

Requires driver support to actually put the packet on the
wire properly.

Signed-off-by: Ben Greear <greearb@candelatech.com>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
2012-02-24 01:37:35 -08:00
Bjorn Helgaas fb127cb9de PCI: collapse pcibios_resource_to_bus
Everybody uses the generic pcibios_resource_to_bus() supplied by the core
now, so remove the ARCH_HAS_GENERIC_PCI_OFFSETS used during conversion.

Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2012-02-23 20:19:04 -07:00
Bjorn Helgaas 36a66cd6fd PCI: add generic pcibios_resource_to_bus()
This replaces the generic versions of pcibios_resource_to_bus() and
pcibios_bus_to_resource() in asm-generic/pci.h with versions that use
pci_resource_to_bus() and pci_bus_to_resource().

The replacements are equivalent except that they can apply host
bridge window offsets when the arch has supplied them by using
pci_add_resource_offset().

Each arch can convert to using pci_add_resource_offset() individually by
removing its device resource fixups from pcibios_fixup_bus() and supplying
ARCH_HAS_GENERIC_PCI_OFFSETS.  ARCH_HAS_GENERIC_PCI_OFFSETS can be removed
after all have converted.

Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2012-02-23 20:19:00 -07:00
Bjorn Helgaas dcce6dc486 PCI: add pci_clear_flags()
Add a pci_clear_flags() for cases when we statically initialize
pci_flags, then decide to clear things out later.

Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2012-02-23 20:18:56 -07:00
Hitoshi Mitake 797a796a13 asm-generic: architecture independent readq/writeq for 32bit environment
This provides unified readq()/writeq() helper functions for 32-bit
drivers.

For some cases, readq/writeq without atomicity is harmful, and order of
io access has to be specified explicitly.  So in this patch, new two
header files which contain non-atomic readq/writeq are added.

 - <asm-generic/io-64-nonatomic-lo-hi.h> provides non-atomic readq/
   writeq with the order of lower address -> higher address

 - <asm-generic/io-64-nonatomic-hi-lo.h> provides non-atomic readq/
   writeq with reversed order

This allows us to remove some readq()s that were added drivers when the
default non-atomic ones were removed in commit dbee8a0aff ("x86:
remove 32-bit versions of readq()/writeq()")

The drivers which need readq/writeq but can do with the non-atomic ones
must add the line:

  #include <asm-generic/io-64-nonatomic-lo-hi.h> /* or hi-lo.h */

But this will be nop in 64-bit environments, and no other #ifdefs are
required.  So I believe that this patch can solve the problem of
 1. driver-specific readq/writeq
 2. atomicity and order of io access

This patch is tested with building allyesconfig and allmodconfig as
ARCH=x86 and ARCH=i386 on top of tip/master.

Cc: Kashyap Desai <Kashyap.Desai@lsi.com>
Cc: Len Brown <lenb@kernel.org>
Cc: Ravi Anand <ravi.anand@qlogic.com>
Cc: Vikas Chaudhary <vikas.chaudhary@qlogic.com>
Cc: Matthew Garrett <mjg@redhat.com>
Cc: Jason Uhlenkott <juhlenko@akamai.com>
Cc: James Bottomley <James.Bottomley@parallels.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Roland Dreier <roland@purestorage.com>
Cc: James Bottomley <jbottomley@parallels.com>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: Matthew Wilcox <matthew.r.wilcox@intel.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Hitoshi Mitake <h.mitake@gmail.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2012-02-21 16:47:28 -08:00
Pavel Emelyanov ef64a54f6e sock: Introduce the SO_PEEK_OFF sock option
This one specifies where to start MSG_PEEK-ing queue data from. When
set to negative value means that MSG_PEEK works as ususally -- peeks
from the head of the queue always.

When some bytes are peeked from queue and the peeking offset is non
negative it is moved forward so that the next peek will return next
portion of data.

When non-peeking recvmsg occurs and the peeking offset is non negative
is is moved backward so that the next peek will still peek the proper
data (i.e. the one that would have been picked if there were no non
peeking recv in between).

The offset is set using per-proto opteration to let the protocol handle
the locking issues and to check whether the peeking offset feature is
supported by the protocol the socket belongs to.

Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2012-02-21 15:03:48 -05:00
David Howells d66acc39c7 bitops: Optimise get_order()
Optimise get_order() to use bit scanning instructions if such exist rather than
a loop.  Also, make it possible to use get_order() in static initialisations
too by building it on top of ilog2() in the constant parameter case.

This has been tested for i386 and x86_64 using the following userspace program,
and for FRV by making appropriate substitutions for fls() and fls64().  It will
abort if the case for get_order() deviates from the original except for the
order of 0, for which get_order() produces an undefined result.  This program
tests both dynamic and static parameters.

	#include <stdlib.h>
	#include <stdio.h>

	#ifdef __x86_64__
	#define BITS_PER_LONG 64
	#else
	#define BITS_PER_LONG 32
	#endif

	#define PAGE_SHIFT 12

	typedef unsigned long long __u64, u64;
	typedef unsigned int __u32, u32;
	#define noinline	__attribute__((noinline))

	static inline int fls(int x)
	{
		int bitpos = -1;

		asm("bsrl %1,%0"
		    : "+r" (bitpos)
		    : "rm" (x));
		return bitpos + 1;
	}

	static __always_inline int fls64(__u64 x)
	{
	#if BITS_PER_LONG == 64
		long bitpos = -1;

		asm("bsrq %1,%0"
		    : "+r" (bitpos)
		    : "rm" (x));
		return bitpos + 1;
	#else
		__u32 h = x >> 32, l = x;
		int bitpos = -1;

		asm("bsrl	%1,%0	\n"
		    "subl	%2,%0	\n"
		    "bsrl	%3,%0	\n"
		    : "+r" (bitpos)
		    : "rm" (l), "i"(32), "rm" (h));

		return bitpos + 33;
	#endif
	}

	static inline __attribute__((const))
	int __ilog2_u32(u32 n)
	{
		return fls(n) - 1;
	}

	static inline __attribute__((const))
	int __ilog2_u64(u64 n)
	{
		return fls64(n) - 1;
	}

	extern __attribute__((const, noreturn))
	int ____ilog2_NaN(void);

	#define ilog2(n)				\
	(						\
		__builtin_constant_p(n) ? (		\
			(n) < 1 ? ____ilog2_NaN() :	\
			(n) & (1ULL << 63) ? 63 :	\
			(n) & (1ULL << 62) ? 62 :	\
			(n) & (1ULL << 61) ? 61 :	\
			(n) & (1ULL << 60) ? 60 :	\
			(n) & (1ULL << 59) ? 59 :	\
			(n) & (1ULL << 58) ? 58 :	\
			(n) & (1ULL << 57) ? 57 :	\
			(n) & (1ULL << 56) ? 56 :	\
			(n) & (1ULL << 55) ? 55 :	\
			(n) & (1ULL << 54) ? 54 :	\
			(n) & (1ULL << 53) ? 53 :	\
			(n) & (1ULL << 52) ? 52 :	\
			(n) & (1ULL << 51) ? 51 :	\
			(n) & (1ULL << 50) ? 50 :	\
			(n) & (1ULL << 49) ? 49 :	\
			(n) & (1ULL << 48) ? 48 :	\
			(n) & (1ULL << 47) ? 47 :	\
			(n) & (1ULL << 46) ? 46 :	\
			(n) & (1ULL << 45) ? 45 :	\
			(n) & (1ULL << 44) ? 44 :	\
			(n) & (1ULL << 43) ? 43 :	\
			(n) & (1ULL << 42) ? 42 :	\
			(n) & (1ULL << 41) ? 41 :	\
			(n) & (1ULL << 40) ? 40 :	\
			(n) & (1ULL << 39) ? 39 :	\
			(n) & (1ULL << 38) ? 38 :	\
			(n) & (1ULL << 37) ? 37 :	\
			(n) & (1ULL << 36) ? 36 :	\
			(n) & (1ULL << 35) ? 35 :	\
			(n) & (1ULL << 34) ? 34 :	\
			(n) & (1ULL << 33) ? 33 :	\
			(n) & (1ULL << 32) ? 32 :	\
			(n) & (1ULL << 31) ? 31 :	\
			(n) & (1ULL << 30) ? 30 :	\
			(n) & (1ULL << 29) ? 29 :	\
			(n) & (1ULL << 28) ? 28 :	\
			(n) & (1ULL << 27) ? 27 :	\
			(n) & (1ULL << 26) ? 26 :	\
			(n) & (1ULL << 25) ? 25 :	\
			(n) & (1ULL << 24) ? 24 :	\
			(n) & (1ULL << 23) ? 23 :	\
			(n) & (1ULL << 22) ? 22 :	\
			(n) & (1ULL << 21) ? 21 :	\
			(n) & (1ULL << 20) ? 20 :	\
			(n) & (1ULL << 19) ? 19 :	\
			(n) & (1ULL << 18) ? 18 :	\
			(n) & (1ULL << 17) ? 17 :	\
			(n) & (1ULL << 16) ? 16 :	\
			(n) & (1ULL << 15) ? 15 :	\
			(n) & (1ULL << 14) ? 14 :	\
			(n) & (1ULL << 13) ? 13 :	\
			(n) & (1ULL << 12) ? 12 :	\
			(n) & (1ULL << 11) ? 11 :	\
			(n) & (1ULL << 10) ? 10 :	\
			(n) & (1ULL <<  9) ?  9 :	\
			(n) & (1ULL <<  8) ?  8 :	\
			(n) & (1ULL <<  7) ?  7 :	\
			(n) & (1ULL <<  6) ?  6 :	\
			(n) & (1ULL <<  5) ?  5 :	\
			(n) & (1ULL <<  4) ?  4 :	\
			(n) & (1ULL <<  3) ?  3 :	\
			(n) & (1ULL <<  2) ?  2 :	\
			(n) & (1ULL <<  1) ?  1 :	\
			(n) & (1ULL <<  0) ?  0 :	\
			____ilog2_NaN()			\
					   ) :		\
		(sizeof(n) <= 4) ?			\
		__ilog2_u32(n) :			\
		__ilog2_u64(n)				\
	 )

	static noinline __attribute__((const))
	int old_get_order(unsigned long size)
	{
		int order;

		size = (size - 1) >> (PAGE_SHIFT - 1);
		order = -1;
		do {
			size >>= 1;
			order++;
		} while (size);
		return order;
	}

	static noinline __attribute__((const))
	int __get_order(unsigned long size)
	{
		int order;
		size--;
		size >>= PAGE_SHIFT;
	#if BITS_PER_LONG == 32
		order = fls(size);
	#else
		order = fls64(size);
	#endif
		return order;
	}

	#define get_order(n)						\
	(								\
		__builtin_constant_p(n) ? (				\
			(n == 0UL) ? BITS_PER_LONG - PAGE_SHIFT :	\
			((n < (1UL << PAGE_SHIFT)) ? 0 :		\
			 ilog2((n) - 1) - PAGE_SHIFT + 1)		\
		) :							\
		__get_order(n)						\
	)

	#define order(N) \
		{ (1UL << N) - 1,	get_order((1UL << N) - 1)	},	\
		{ (1UL << N),		get_order((1UL << N))		},	\
		{ (1UL << N) + 1,	get_order((1UL << N) + 1)	}

	struct order {
		unsigned long n, order;
	};

	static const struct order order_table[] = {
		order(0),
		order(1),
		order(2),
		order(3),
		order(4),
		order(5),
		order(6),
		order(7),
		order(8),
		order(9),
		order(10),
		order(11),
		order(12),
		order(13),
		order(14),
		order(15),
		order(16),
		order(17),
		order(18),
		order(19),
		order(20),
		order(21),
		order(22),
		order(23),
		order(24),
		order(25),
		order(26),
		order(27),
		order(28),
		order(29),
		order(30),
		order(31),
	#if BITS_PER_LONG == 64
		order(32),
		order(33),
		order(34),
		order(35),
	#endif
		{ 0x2929 }
	};

	void check(int loop, unsigned long n)
	{
		unsigned long old, new;

		printf("[%2d]: %09lx | ", loop, n);

		old = old_get_order(n);
		new = get_order(n);

		printf("%3ld, %3ld\n", old, new);
		if (n != 0 && old != new)
			abort();
	}

	int main(int argc, char **argv)
	{
		const struct order *p;
		unsigned long n;
		int loop;

		for (loop = 0; loop <= BITS_PER_LONG - 1; loop++) {
			n = 1UL << loop;
			check(loop, n - 1);
			check(loop, n);
			check(loop, n + 1);
		}

		for (p = order_table; p->n != 0x2929; p++) {
			unsigned long old, new;

			old = old_get_order(p->n);
			new = p->order;
			printf("%09lx\t%3ld, %3ld\n", p->n, old, new);
			if (p->n != 0 && old != new)
				abort();
		}

		return 0;
	}

Disassembling the x86_64 version of the above code shows:

	0000000000400510 <old_get_order>:
	  400510:       48 83 ef 01             sub    $0x1,%rdi
	  400514:       b8 ff ff ff ff          mov    $0xffffffff,%eax
	  400519:       48 c1 ef 0b             shr    $0xb,%rdi
	  40051d:       0f 1f 00                nopl   (%rax)
	  400520:       83 c0 01                add    $0x1,%eax
	  400523:       48 d1 ef                shr    %rdi
	  400526:       75 f8                   jne    400520 <old_get_order+0x10>
	  400528:       f3 c3                   repz retq
	  40052a:       66 0f 1f 44 00 00       nopw   0x0(%rax,%rax,1)

	0000000000400530 <__get_order>:
	  400530:       48 83 ef 01             sub    $0x1,%rdi
	  400534:       48 c7 c0 ff ff ff ff    mov    $0xffffffffffffffff,%rax
	  40053b:       48 c1 ef 0c             shr    $0xc,%rdi
	  40053f:       48 0f bd c7             bsr    %rdi,%rax
	  400543:       83 c0 01                add    $0x1,%eax
	  400546:       c3                      retq
	  400547:       66 0f 1f 84 00 00 00    nopw   0x0(%rax,%rax,1)
	  40054e:       00 00

As can be seen, the new __get_order() function is simpler than the
old_get_order() function.

Signed-off-by: David Howells <dhowells@redhat.com>
Link: http://lkml.kernel.org/r/20120220223928.16199.29548.stgit@warthog.procyon.org.uk
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
2012-02-20 14:47:02 -08:00
David Howells e0891a9816 bitops: Adjust the comment on get_order() to describe the size==0 case
Adjust the comment on get_order() to note that the result of passing a size of
0 results in an undefined value.

Signed-off-by: David Howells <dhowells@redhat.com>
Link: http://lkml.kernel.org/r/20120220223917.16199.9416.stgit@warthog.procyon.org.uk
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
2012-02-20 14:46:55 -08:00
H. Peter Anvin afead38d01 posix_types: Introduce __kernel_[u]long_t
Introduce __kernel_[u]long_t, which allows an ABI to override all
defaults of type [unsigned] long.

This enables x32 and potentially other 32-bit userspace on 64-bit
kernel ABIs.

Signed-off-by: H. Peter Anvin <hpa@zytor.com>
2012-02-20 12:48:47 -08:00
H. Peter Anvin 8b3d1cda4f posix_types: Remove fd_set macros
<asm/posix_types.h> includes a set of macros that operate on file
descriptors.  Way long ago those were exported to user space, but
nowadays they are #ifdef __KERNEL__.

However, they are nothing but standard (nonatomic) bit operations, and
we already have optimized versions of bit operations in the kernel.
We can't include <linux/bitops.h> in <asm/posix_types.h> but we can
move the definitions to <linux/time.h> and define them there in terms
of standard kernel bitops.

[ v2: folds the following fixes in:

  a) Stray space in __FD_SET(), reported by Andrew Morton
  b) #include <linux/string.h> needed for memset(), reported by Tony Luck ]

Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Link: http://lkml.kernel.org/r/1328677745-20121-22-git-send-email-hpa@zytor.com
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
2012-02-14 12:47:21 -08:00
H. Peter Anvin 34e6f9e9f9 posix_types: Make it possible to override __kernel_fsid_t
__kernel_fsid_t has members of type "long" on at least one
architecture (MIPS32), so make it possible to override the definition.

Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Link: http://lkml.kernel.org/r/1328677745-20121-3-git-send-email-hpa@zytor.com
Cc: Arnd Bergmann <arnd@arndb.de>
2012-02-14 12:01:27 -08:00
H. Peter Anvin b4255ba3fb posix_types: Make __kernel_[ug]id32_t default to unsigned int
All ports use unsigned int for __kernel_[ug]id32_t, but not all ports
use unsigned int for __kernel_[ug]id_t.  Thus, change the default for
the "32" types so ports don't need to override them.

Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Link: http://lkml.kernel.org/r/1328677745-20121-2-git-send-email-hpa@zytor.com
Cc: Arnd Bergmann <arnd@arndb.de>
2012-02-14 12:01:27 -08:00
Michael S. Tsirkin b923650b84 lib: add NO_GENERIC_PCI_IOPORT_MAP
Some architectures need to override the way
IO port mapping is done on PCI devices.
Supply a generic macro that calls
ioport_map, and make it possible for architectures
to override.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
2012-01-31 23:19:47 +02:00
Linus Torvalds dca88ad691 Merge branch 'for-next' of git://git.infradead.org/users/dhowells/linux-headers
* 'for-next' of git://git.infradead.org/users/dhowells/linux-headers:
  UAPI: Split trivial #if defined(__KERNEL__) && X conditionals
  UAPI: Don't have a #elif clause in a __KERNEL__ guard in linux/soundcard.h
  UAPI: Fix AHZ multiple inclusion when __KERNEL__ is removed
  UAPI: Make linux/patchkey.h easier to parse
  UAPI: Fix nested __KERNEL__ guards in video/edid.h
  UAPI: Alter the S390 asm include guards to be recognisable by the UAPI splitter
  UAPI: Guard linux/cuda.h
  UAPI: Guard linux/pmu.h
  UAPI: Guard linux/isdn_divertif.h
  UAPI: Guard linux/sound.h
  UAPI: Rearrange definition of HZ in asm-generic/param.h
  UAPI: Make FRV use asm-generic/param.h
  UAPI: Make M32R use asm-generic/param.h
  UAPI: Make MN10300 use asm-generic/param.h
  UAPI: elf_read_implies_exec() is a kernel-only feature - so hide from userspace
  UAPI: Don't include linux/compat.h in sparc's asm/siginfo.h
  UAPI: Fix arch/mips/include/asm/Kbuild to have separate header-y lines
2012-01-14 18:03:30 -08:00
Linus Torvalds f5e4e20faa 2nd round of GPIO changes for v3.3 merge window
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Merge tag 'gpio-for-linus' of git://git.secretlab.ca/git/linux-2.6

2nd round of GPIO changes for v3.3 merge window

* tag 'gpio-for-linus' of git://git.secretlab.ca/git/linux-2.6:
  GPIO: sa1100: implement proper gpiolib gpio_to_irq conversion
  gpio: pl061: remove combined interrupt
  gpio: pl061: convert to use generic irq chip
  GPIO: add bindings for managed devices
  ARM: realview: convert pl061 no irq to 0 instead of -1
  gpio: pl061: convert to use 0 for no irq
  gpio: pl061: use chained_irq_* functions in irq handler
  GPIO/pl061: Add suspend resume capability
  drivers/gpio/gpio-tegra.c: use devm_request_and_ioremap
2012-01-14 13:25:23 -08:00
Shaohua Li f21760b15d thp: add tlb_remove_pmd_tlb_entry
We have tlb_remove_tlb_entry to indicate a pte tlb flush entry should be
flushed, but not a corresponding API for pmd entry.  This isn't a
problem so far because THP is only for x86 currently and tlb_flush()
under x86 will flush entire TLB.  But this is confusion and could be
missed if thp is ported to other arch.

Also convert tlb->need_flush = 1 to a VM_BUG_ON(!tlb->need_flush) in
__tlb_remove_page() as suggested by Andrea Arcangeli.  The
__tlb_remove_page() function is supposed to be called after
tlb_remove_xxx_tlb_entry() and we can catch any misuse.

Signed-off-by: Shaohua Li <shaohua.li@intel.com>
Reviewed-by: Andrea Arcangeli <aarcange@redhat.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Johannes Weiner <jweiner@redhat.com>
Cc: Minchan Kim <minchan.kim@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2012-01-12 20:13:08 -08:00
Linus Torvalds e343a895a9 lib: use generic pci_iomap on all architectures
Many architectures don't want to pull in iomap.c,
 so they ended up duplicating pci_iomap from that file.
 That function isn't trivial, and we are going to modify it
 https://lkml.org/lkml/2011/11/14/183
 so the duplication hurts.
 
 This reduces the scope of the problem significantly,
 by moving pci_iomap to a separate file and
 referencing that from all architectures.
 
 Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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Merge tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost

lib: use generic pci_iomap on all architectures

Many architectures don't want to pull in iomap.c,
so they ended up duplicating pci_iomap from that file.
That function isn't trivial, and we are going to modify it
https://lkml.org/lkml/2011/11/14/183
so the duplication hurts.

This reduces the scope of the problem significantly,
by moving pci_iomap to a separate file and
referencing that from all architectures.

* tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost:
  alpha: drop pci_iomap/pci_iounmap from pci-noop.c
  mn10300: switch to GENERIC_PCI_IOMAP
  mn10300: add missing __iomap markers
  frv: switch to GENERIC_PCI_IOMAP
  tile: switch to GENERIC_PCI_IOMAP
  tile: don't panic on iomap
  sparc: switch to GENERIC_PCI_IOMAP
  sh: switch to GENERIC_PCI_IOMAP
  powerpc: switch to GENERIC_PCI_IOMAP
  parisc: switch to GENERIC_PCI_IOMAP
  mips: switch to GENERIC_PCI_IOMAP
  microblaze: switch to GENERIC_PCI_IOMAP
  arm: switch to GENERIC_PCI_IOMAP
  alpha: switch to GENERIC_PCI_IOMAP
  lib: add GENERIC_PCI_IOMAP
  lib: move GENERIC_IOMAP to lib/Kconfig

Fix up trivial conflicts due to changes nearby in arch/{m68k,score}/Kconfig
2012-01-10 18:04:27 -08:00
Linus Torvalds 06792c4dde The following changes since commit 3ee72ca992
are available in the git repository:
 
     git://linux-c6x.org/git/projects/linux-c6x-upstreaming.git for-linux-next
 
  Documentation/devicetree/bindings/c6x/clocks.txt   |   40 +
  Documentation/devicetree/bindings/c6x/dscr.txt     |  127 +++
  Documentation/devicetree/bindings/c6x/emifa.txt    |   62 ++
  .../devicetree/bindings/c6x/interrupt.txt          |  104 +++
  Documentation/devicetree/bindings/c6x/soc.txt      |   28 +
  Documentation/devicetree/bindings/c6x/timer64.txt  |   26 +
  MAINTAINERS                                        |    8 +
  arch/c6x/Kconfig                                   |  174 +++++
  arch/c6x/Makefile                                  |   60 ++
  arch/c6x/boot/Makefile                             |   30 +
  arch/c6x/boot/dts/dsk6455.dts                      |   62 ++
  arch/c6x/boot/dts/evmc6457.dts                     |   48 ++
  arch/c6x/boot/dts/evmc6472.dts                     |   73 ++
  arch/c6x/boot/dts/evmc6474.dts                     |   58 ++
  arch/c6x/boot/dts/tms320c6455.dtsi                 |   96 +++
  arch/c6x/boot/dts/tms320c6457.dtsi                 |   68 ++
  arch/c6x/boot/dts/tms320c6472.dtsi                 |  134 ++++
  arch/c6x/boot/dts/tms320c6474.dtsi                 |   89 +++
  arch/c6x/boot/linked_dtb.S                         |    2 +
  arch/c6x/configs/dsk6455_defconfig                 |   44 ++
  arch/c6x/configs/evmc6457_defconfig                |   41 +
  arch/c6x/configs/evmc6472_defconfig                |   42 +
  arch/c6x/configs/evmc6474_defconfig                |   42 +
  arch/c6x/include/asm/Kbuild                        |   54 ++
  arch/c6x/include/asm/asm-offsets.h                 |    1 +
  arch/c6x/include/asm/bitops.h                      |  105 +++
  arch/c6x/include/asm/byteorder.h                   |   12 +
  arch/c6x/include/asm/cache.h                       |   90 +++
  arch/c6x/include/asm/cacheflush.h                  |   65 ++
  arch/c6x/include/asm/checksum.h                    |   34 +
  arch/c6x/include/asm/clkdev.h                      |   22 +
  arch/c6x/include/asm/clock.h                       |  148 ++++
  arch/c6x/include/asm/delay.h                       |   67 ++
  arch/c6x/include/asm/dma-mapping.h                 |   91 +++
  arch/c6x/include/asm/dscr.h                        |   34 +
  arch/c6x/include/asm/elf.h                         |  113 +++
  arch/c6x/include/asm/ftrace.h                      |    6 +
  arch/c6x/include/asm/hardirq.h                     |   20 +
  arch/c6x/include/asm/irq.h                         |  302 ++++++++
  arch/c6x/include/asm/irqflags.h                    |   72 ++
  arch/c6x/include/asm/linkage.h                     |   30 +
  arch/c6x/include/asm/megamod-pic.h                 |    9 +
  arch/c6x/include/asm/mmu.h                         |   18 +
  arch/c6x/include/asm/module.h                      |   33 +
  arch/c6x/include/asm/mutex.h                       |    6 +
  arch/c6x/include/asm/page.h                        |   11 +
  arch/c6x/include/asm/pgtable.h                     |   81 ++
  arch/c6x/include/asm/processor.h                   |  132 ++++
  arch/c6x/include/asm/procinfo.h                    |   28 +
  arch/c6x/include/asm/prom.h                        |    1 +
  arch/c6x/include/asm/ptrace.h                      |  174 +++++
  arch/c6x/include/asm/sections.h                    |   12 +
  arch/c6x/include/asm/setup.h                       |   32 +
  arch/c6x/include/asm/sigcontext.h                  |   80 ++
  arch/c6x/include/asm/signal.h                      |   17 +
  arch/c6x/include/asm/soc.h                         |   35 +
  arch/c6x/include/asm/string.h                      |   21 +
  arch/c6x/include/asm/swab.h                        |   54 ++
  arch/c6x/include/asm/syscall.h                     |  123 +++
  arch/c6x/include/asm/syscalls.h                    |   55 ++
  arch/c6x/include/asm/system.h                      |  168 ++++
  arch/c6x/include/asm/thread_info.h                 |  121 +++
  arch/c6x/include/asm/timer64.h                     |    6 +
  arch/c6x/include/asm/timex.h                       |   33 +
  arch/c6x/include/asm/tlb.h                         |    8 +
  arch/c6x/include/asm/traps.h                       |   36 +
  arch/c6x/include/asm/uaccess.h                     |  107 +++
  arch/c6x/include/asm/unaligned.h                   |  170 +++++
  arch/c6x/include/asm/unistd.h                      |   26 +
  arch/c6x/kernel/Makefile                           |   12 +
  arch/c6x/kernel/asm-offsets.c                      |  123 +++
  arch/c6x/kernel/c6x_ksyms.c                        |   66 ++
  arch/c6x/kernel/devicetree.c                       |   53 ++
  arch/c6x/kernel/dma.c                              |  153 ++++
  arch/c6x/kernel/entry.S                            |  803 ++++++++++++++++++++
  arch/c6x/kernel/head.S                             |   84 ++
  arch/c6x/kernel/irq.c                              |  728 ++++++++++++++++++
  arch/c6x/kernel/module.c                           |  123 +++
  arch/c6x/kernel/process.c                          |  265 +++++++
  arch/c6x/kernel/ptrace.c                           |  187 +++++
  arch/c6x/kernel/setup.c                            |  510 +++++++++++++
  arch/c6x/kernel/signal.c                           |  377 +++++++++
  arch/c6x/kernel/soc.c                              |   91 +++
  arch/c6x/kernel/switch_to.S                        |   74 ++
  arch/c6x/kernel/sys_c6x.c                          |   74 ++
  arch/c6x/kernel/time.c                             |   65 ++
  arch/c6x/kernel/traps.c                            |  423 ++++++++++
  arch/c6x/kernel/vectors.S                          |   81 ++
  arch/c6x/kernel/vmlinux.lds.S                      |  162 ++++
  arch/c6x/lib/Makefile                              |    7 +
  arch/c6x/lib/checksum.c                            |   36 +
  arch/c6x/lib/csum_64plus.S                         |  419 ++++++++++
  arch/c6x/lib/divi.S                                |   53 ++
  arch/c6x/lib/divremi.S                             |   46 ++
  arch/c6x/lib/divremu.S                             |   87 +++
  arch/c6x/lib/divu.S                                |   98 +++
  arch/c6x/lib/llshl.S                               |   37 +
  arch/c6x/lib/llshr.S                               |   38 +
  arch/c6x/lib/llshru.S                              |   38 +
  arch/c6x/lib/memcpy_64plus.S                       |   46 ++
  arch/c6x/lib/mpyll.S                               |   49 ++
  arch/c6x/lib/negll.S                               |   31 +
  arch/c6x/lib/pop_rts.S                             |   32 +
  arch/c6x/lib/push_rts.S                            |   31 +
  arch/c6x/lib/remi.S                                |   64 ++
  arch/c6x/lib/remu.S                                |   82 ++
  arch/c6x/lib/strasgi.S                             |   89 +++
  arch/c6x/lib/strasgi_64plus.S                      |   39 +
  arch/c6x/mm/Makefile                               |    5 +
  arch/c6x/mm/dma-coherent.c                         |  143 ++++
  arch/c6x/mm/init.c                                 |  113 +++
  arch/c6x/platforms/Kconfig                         |   16 +
  arch/c6x/platforms/Makefile                        |   12 +
  arch/c6x/platforms/cache.c                         |  445 +++++++++++
  arch/c6x/platforms/dscr.c                          |  598 +++++++++++++++
  arch/c6x/platforms/emif.c                          |   87 +++
  arch/c6x/platforms/megamod-pic.c                   |  349 +++++++++
  arch/c6x/platforms/platform.c                      |   17 +
  arch/c6x/platforms/pll.c                           |  444 +++++++++++
  arch/c6x/platforms/plldata.c                       |  404 ++++++++++
  arch/c6x/platforms/timer64.c                       |  244 ++++++
  include/asm-generic/io.h                           |    2 +-
  include/asm-generic/page.h                         |   10 +-
  include/asm-generic/uaccess.h                      |    7 +-
  include/linux/elf-em.h                             |    1 +
  125 files changed, 12989 insertions(+), 5 deletions(-)
  create mode 100644 Documentation/devicetree/bindings/c6x/clocks.txt
  create mode 100644 Documentation/devicetree/bindings/c6x/dscr.txt
  create mode 100644 Documentation/devicetree/bindings/c6x/emifa.txt
  create mode 100644 Documentation/devicetree/bindings/c6x/interrupt.txt
  create mode 100644 Documentation/devicetree/bindings/c6x/soc.txt
  create mode 100644 Documentation/devicetree/bindings/c6x/timer64.txt
  create mode 100644 arch/c6x/Kconfig
  create mode 100644 arch/c6x/Makefile
  create mode 100644 arch/c6x/boot/Makefile
  create mode 100644 arch/c6x/boot/dts/dsk6455.dts
  create mode 100644 arch/c6x/boot/dts/evmc6457.dts
  create mode 100644 arch/c6x/boot/dts/evmc6472.dts
  create mode 100644 arch/c6x/boot/dts/evmc6474.dts
  create mode 100644 arch/c6x/boot/dts/tms320c6455.dtsi
  create mode 100644 arch/c6x/boot/dts/tms320c6457.dtsi
  create mode 100644 arch/c6x/boot/dts/tms320c6472.dtsi
  create mode 100644 arch/c6x/boot/dts/tms320c6474.dtsi
  create mode 100644 arch/c6x/boot/linked_dtb.S
  create mode 100644 arch/c6x/configs/dsk6455_defconfig
  create mode 100644 arch/c6x/configs/evmc6457_defconfig
  create mode 100644 arch/c6x/configs/evmc6472_defconfig
  create mode 100644 arch/c6x/configs/evmc6474_defconfig
  create mode 100644 arch/c6x/include/asm/Kbuild
  create mode 100644 arch/c6x/include/asm/asm-offsets.h
  create mode 100644 arch/c6x/include/asm/bitops.h
  create mode 100644 arch/c6x/include/asm/byteorder.h
  create mode 100644 arch/c6x/include/asm/cache.h
  create mode 100644 arch/c6x/include/asm/cacheflush.h
  create mode 100644 arch/c6x/include/asm/checksum.h
  create mode 100644 arch/c6x/include/asm/clkdev.h
  create mode 100644 arch/c6x/include/asm/clock.h
  create mode 100644 arch/c6x/include/asm/delay.h
  create mode 100644 arch/c6x/include/asm/dma-mapping.h
  create mode 100644 arch/c6x/include/asm/dscr.h
  create mode 100644 arch/c6x/include/asm/elf.h
  create mode 100644 arch/c6x/include/asm/ftrace.h
  create mode 100644 arch/c6x/include/asm/hardirq.h
  create mode 100644 arch/c6x/include/asm/irq.h
  create mode 100644 arch/c6x/include/asm/irqflags.h
  create mode 100644 arch/c6x/include/asm/linkage.h
  create mode 100644 arch/c6x/include/asm/megamod-pic.h
  create mode 100644 arch/c6x/include/asm/mmu.h
  create mode 100644 arch/c6x/include/asm/module.h
  create mode 100644 arch/c6x/include/asm/mutex.h
  create mode 100644 arch/c6x/include/asm/page.h
  create mode 100644 arch/c6x/include/asm/pgtable.h
  create mode 100644 arch/c6x/include/asm/processor.h
  create mode 100644 arch/c6x/include/asm/procinfo.h
  create mode 100644 arch/c6x/include/asm/prom.h
  create mode 100644 arch/c6x/include/asm/ptrace.h
  create mode 100644 arch/c6x/include/asm/sections.h
  create mode 100644 arch/c6x/include/asm/setup.h
  create mode 100644 arch/c6x/include/asm/sigcontext.h
  create mode 100644 arch/c6x/include/asm/signal.h
  create mode 100644 arch/c6x/include/asm/soc.h
  create mode 100644 arch/c6x/include/asm/string.h
  create mode 100644 arch/c6x/include/asm/swab.h
  create mode 100644 arch/c6x/include/asm/syscall.h
  create mode 100644 arch/c6x/include/asm/syscalls.h
  create mode 100644 arch/c6x/include/asm/system.h
  create mode 100644 arch/c6x/include/asm/thread_info.h
  create mode 100644 arch/c6x/include/asm/timer64.h
  create mode 100644 arch/c6x/include/asm/timex.h
  create mode 100644 arch/c6x/include/asm/tlb.h
  create mode 100644 arch/c6x/include/asm/traps.h
  create mode 100644 arch/c6x/include/asm/uaccess.h
  create mode 100644 arch/c6x/include/asm/unaligned.h
  create mode 100644 arch/c6x/include/asm/unistd.h
  create mode 100644 arch/c6x/kernel/Makefile
  create mode 100644 arch/c6x/kernel/asm-offsets.c
  create mode 100644 arch/c6x/kernel/c6x_ksyms.c
  create mode 100644 arch/c6x/kernel/devicetree.c
  create mode 100644 arch/c6x/kernel/dma.c
  create mode 100644 arch/c6x/kernel/entry.S
  create mode 100644 arch/c6x/kernel/head.S
  create mode 100644 arch/c6x/kernel/irq.c
  create mode 100644 arch/c6x/kernel/module.c
  create mode 100644 arch/c6x/kernel/process.c
  create mode 100644 arch/c6x/kernel/ptrace.c
  create mode 100644 arch/c6x/kernel/setup.c
  create mode 100644 arch/c6x/kernel/signal.c
  create mode 100644 arch/c6x/kernel/soc.c
  create mode 100644 arch/c6x/kernel/switch_to.S
  create mode 100644 arch/c6x/kernel/sys_c6x.c
  create mode 100644 arch/c6x/kernel/time.c
  create mode 100644 arch/c6x/kernel/traps.c
  create mode 100644 arch/c6x/kernel/vectors.S
  create mode 100644 arch/c6x/kernel/vmlinux.lds.S
  create mode 100644 arch/c6x/lib/Makefile
  create mode 100644 arch/c6x/lib/checksum.c
  create mode 100644 arch/c6x/lib/csum_64plus.S
  create mode 100644 arch/c6x/lib/divi.S
  create mode 100644 arch/c6x/lib/divremi.S
  create mode 100644 arch/c6x/lib/divremu.S
  create mode 100644 arch/c6x/lib/divu.S
  create mode 100644 arch/c6x/lib/llshl.S
  create mode 100644 arch/c6x/lib/llshr.S
  create mode 100644 arch/c6x/lib/llshru.S
  create mode 100644 arch/c6x/lib/memcpy_64plus.S
  create mode 100644 arch/c6x/lib/mpyll.S
  create mode 100644 arch/c6x/lib/negll.S
  create mode 100644 arch/c6x/lib/pop_rts.S
  create mode 100644 arch/c6x/lib/push_rts.S
  create mode 100644 arch/c6x/lib/remi.S
  create mode 100644 arch/c6x/lib/remu.S
  create mode 100644 arch/c6x/lib/strasgi.S
  create mode 100644 arch/c6x/lib/strasgi_64plus.S
  create mode 100644 arch/c6x/mm/Makefile
  create mode 100644 arch/c6x/mm/dma-coherent.c
  create mode 100644 arch/c6x/mm/init.c
  create mode 100644 arch/c6x/platforms/Kconfig
  create mode 100644 arch/c6x/platforms/Makefile
  create mode 100644 arch/c6x/platforms/cache.c
  create mode 100644 arch/c6x/platforms/dscr.c
  create mode 100644 arch/c6x/platforms/emif.c
  create mode 100644 arch/c6x/platforms/megamod-pic.c
  create mode 100644 arch/c6x/platforms/platform.c
  create mode 100644 arch/c6x/platforms/pll.c
  create mode 100644 arch/c6x/platforms/plldata.c
  create mode 100644 arch/c6x/platforms/timer64.c
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Merge tag 'for-linux-3.3-merge-window' of git://linux-c6x.org/git/projects/linux-c6x-upstreaming

* tag 'for-linux-3.3-merge-window' of git://linux-c6x.org/git/projects/linux-c6x-upstreaming: (29 commits)
  C6X: replace tick_nohz_stop/restart_sched_tick calls
  C6X: add register_cpu call
  C6X: deal with memblock API changes
  C6X: fix timer64 initialization
  C6X: fix layout of EMIFA registers
  C6X: MAINTAINERS
  C6X: DSCR - Device State Configuration Registers
  C6X: EMIF - External Memory Interface
  C6X: general SoC support
  C6X: library code
  C6X: headers
  C6X: ptrace support
  C6X: loadable module support
  C6X: cache control
  C6X: clocks
  C6X: build infrastructure
  C6X: syscalls
  C6X: interrupt handling
  C6X: time management
  C6X: signal management
  ...
2012-01-10 17:39:40 -08:00