Commit Graph

696 Commits

Author SHA1 Message Date
David S. Miller 9b02605826 sparc64: Kill bogus TPC/address truncation during 32-bit faults.
This builds upon eeabac7386
("sparc64: Validate kernel generated fault addresses on sparc64.")

Upon further consideration, we actually should never see any
fault addresses for 32-bit tasks with the upper 32-bits set.

If it does every happen, by definition it's a bug.  Whatever
context created that fault would only have that fault satisfied
if we used the full 64-bit address.  If we truncate it, we'll
always fault the wrong address and we'll always loop faulting
forever.

So catch such conditions and mark them as errors always.  Log
the error and fail the fault.

Signed-off-by: David S. Miller <davem@davemloft.net>
2009-02-03 16:28:23 -08:00
Stephen Rothwell 47a4a0e766 sparc: fixup for sparseirq changes
Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
2009-02-02 22:14:28 -08:00
David S. Miller eeabac7386 sparc64: Validate kernel generated fault addresses on sparc64.
In order to handle all of the cases of address calculation overflow
properly, we run sparc 32-bit processes in "address masking" mode
when running on a 64-bit kernel.

Address masking mode zeros out the top 32-bits of the address
calculated for every load and store instruction.

However, when we're in privileged mode we have to run with that
address masking mode disabled even when accessing userspace from
the kernel.

To "simulate" the address masking mode we clear the top-bits by
hand for 32-bit processes in the fault handler.

It is the responsibility of code in the compat layer to properly
zero extend addresses used to access userspace.  If this isn't
followed properly we can get into a fault loop.

Say that the user address is 0xf0000000 but for whatever reason
the kernel code sign extends this to 64-bit, and then the kernel
tries to access the result.

In such a case we'll fault on address 0xfffffffff0000000 but the fault
handler will process that fault as if it were to address 0xf0000000.
We'll loop faulting forever because the fault never gets satisfied.

So add a check specifically for this case, when the kernel is faulting
on a user address access and the addresses don't match up.

This code path is sufficiently slow path, and this bug is sufficiently
painful to diagnose, that this kind of bug check is warranted.

Signed-off-by: David S. Miller <davem@davemloft.net>
2009-02-02 22:08:15 -08:00
David S. Miller 802c64b310 sparc64: On non-Niagara, need to touch NMI watchdog in NOHZ mode.
When we're idling in NOHZ mode, timer interrupts are not running.

Evidence of processing timer interrupts is what the NMI watchdog
uses to determine if the CPU is stuck.

On Niagara, we'll yield the cpu.  This will make the cpu, at
worst, hang out in the hypervisor until an interrupt arrives.
This will prevent the NMI watchdog timer from firing.

However on non-Niagara we just loop executing instructions
which will cause the NMI watchdog to keep firing.  It won't
see timer interrupts happening so it will think the cpu is
stuck.

Fix this by touching the NMI watchdog in the cpu idle loop
on non-Niagara machines.

Signed-off-by: David S. Miller <davem@davemloft.net>
2009-02-02 21:57:48 -08:00
David S. Miller e5553a6d04 sparc64: Implement NMI watchdog on capable cpus.
Signed-off-by: David S. Miller <davem@davemloft.net>
2009-01-30 00:03:53 -08:00
David S. Miller c3cf5e8cc5 sparc: Probe PMU type and record in sparc_pmu_type.
Signed-off-by: David S. Miller <davem@davemloft.net>
2009-01-28 17:27:14 -08:00
David S. Miller 3eb8057bba sparc64: Move generic PCR support code to seperate file.
It all lives in the oprofile support code currently and we will need
to share this stuff with NMI watchdog and perf_counter support.

Signed-off-by: David S. Miller <davem@davemloft.net>
2009-01-28 17:13:57 -08:00
Linus Torvalds cfb901bf84 Merge branch 'i2c-for-linus' of git://jdelvare.pck.nerim.net/jdelvare-2.6
* 'i2c-for-linus' of git://jdelvare.pck.nerim.net/jdelvare-2.6:
  i2c: Warn on deprecated binding model use
  eeprom: More consistent symbol names
  eeprom: Move 93cx6 eeprom driver to /drivers/misc/eeprom
  spi: Move at25 (for SPI eeproms) to /drivers/misc/eeprom
  i2c: Move old eeprom driver to /drivers/misc/eeprom
  i2c: Move at24 to drivers/misc/eeprom
  i2c: Quilt tree has moved
  i2c: Delete many unused adapter IDs
  i2c: Delete 10 unused driver IDs
2009-01-26 15:11:41 -08:00
Jean Delvare dd7f8dbe2b eeprom: More consistent symbol names
Now that all EEPROM drivers live in the same place, let's harmonize
their symbol names.

Also fix eeprom's dependencies, it definitely needs sysfs, and is no
longer experimental after many years in the kernel tree.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Acked-by: Wolfram Sang <w.sang@pengutronix.de>
Cc: David Brownell <dbrownell@users.sourceforge.net>
2009-01-26 21:19:57 +01:00
David S. Miller fcd26f7ae2 sparc64: Fix DAX handling via userspace access from kernel.
If we do a userspace access from kernel mode, and get a
data access exception, we need to check the exception
table just like a normal fault does.

The spitfire DAX handler was doing this, but such logic
was missing from the sun4v DAX code.

Reported-by: Dennis Gilmore <dgilmore@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2009-01-19 22:44:04 -08:00
David S. Miller e42650196d sparc64: Annotate sparc64 specific syscalls with SYSCALL_DEFINEx()
Signed-off-by: David S. Miller <davem@davemloft.net>
2009-01-19 21:11:27 -08:00
Christian Borntraeger 67605d6812 [CVE-2009-0029] sparc: Enable syscall wrappers for 64-bit
sparc64 needs sign-extended function parameters. We have to enable
the system call wrappers.

Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2009-01-19 20:21:49 -08:00
David S. Miller b7c18c1b26 sparc64: Initialize FHC/CLOCK LED platform_device 'id' field correctly.
There is only one clock board, so use -1 as the 'id' so we get just
the base name as the LED device name string.

There are multiple FHC boards potentially in a system so use the board
number as the 'id' value for that case.

Reported-by: Meelis Roos <mroos@linux.ee>
Tested-by: Meelis Roos <mroos@linux.ee>
Signed-off-by: David S. Miller <davem@davemloft.net>
2009-01-19 13:27:15 -08:00
Sam Ravnborg 62dfcd336c sparc64: fix modpost failure
Previously PeeCeeI.o was a library but it
was always pulled in due to insw and friends being exported
(at least for a modular kernel).

But this resulted in modpost failures if there where no in-kernel
users because then insw & friends were not linked in.

Fix this by including PeeCeeI.o in the kernel unconditionally.

The only drawback for this solution is that a nonmodular kernel
will always include insw & friends no matter if they are in use or not.

Reported-by: Meelis Roos <mroos@linux.ee>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2009-01-17 23:12:27 -08:00
Sam Ravnborg c275ce4492 sparc64: fix readout of cpu/fpu type
Meelis reported that on his box /proc/cpuinfo started
to reported "Unknow CPU" and the same did the boot messages.

It was a stupid bug I introduced when merging
cpu.c for 32 and 64 bit.

The code did an array reference where it had to search
for the right index.

Reported-by: Meelis Roos <mroos@linux.ee>
Tested-by: Meelis Roos <mroos@linux.ee>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2009-01-17 23:10:35 -08:00
Linus Torvalds a9f8d25b65 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6:
  sparc64: Fix UP build failure.
2009-01-15 16:53:42 -08:00
Linus Torvalds bca268565f Merge branch 'syscalls' of git://git390.osdl.marist.edu/pub/scm/linux-2.6
* 'syscalls' of git://git390.osdl.marist.edu/pub/scm/linux-2.6: (44 commits)
  [CVE-2009-0029] s390 specific system call wrappers
  [CVE-2009-0029] System call wrappers part 33
  [CVE-2009-0029] System call wrappers part 32
  [CVE-2009-0029] System call wrappers part 31
  [CVE-2009-0029] System call wrappers part 30
  [CVE-2009-0029] System call wrappers part 29
  [CVE-2009-0029] System call wrappers part 28
  [CVE-2009-0029] System call wrappers part 27
  [CVE-2009-0029] System call wrappers part 26
  [CVE-2009-0029] System call wrappers part 25
  [CVE-2009-0029] System call wrappers part 24
  [CVE-2009-0029] System call wrappers part 23
  [CVE-2009-0029] System call wrappers part 22
  [CVE-2009-0029] System call wrappers part 21
  [CVE-2009-0029] System call wrappers part 20
  [CVE-2009-0029] System call wrappers part 19
  [CVE-2009-0029] System call wrappers part 18
  [CVE-2009-0029] System call wrappers part 17
  [CVE-2009-0029] System call wrappers part 16
  [CVE-2009-0029] System call wrappers part 15
  ...
2009-01-14 19:58:40 -08:00
Harvey Harrison 74d96f0186 byteorder: make swab.h include asm/swab.h like a regular header
Add swab.h to kbuild.asm and remove the individual entries from
each arch, mark as unifdef as some arches have some kernel-only
bits inside.

Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-01-14 19:56:50 -08:00
Heiko Carstens 1134723e96 [CVE-2009-0029] Remove __attribute__((weak)) from sys_pipe/sys_pipe2
Remove __attribute__((weak)) from common code sys_pipe implemantation.
IA64, ALPHA, SUPERH (32bit) and SPARC (32bit) have own implemantations
with the same name. Just rename them.
For sys_pipe2 there is no architecture specific implementation.

Cc: Richard Henderson <rth@twiddle.net>
Cc: David S. Miller <davem@davemloft.net>
Cc: Paul Mundt <lethal@linux-sh.org>
Cc: Tony Luck <tony.luck@intel.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
2009-01-14 14:15:15 +01:00
Heiko Carstens e55380edf6 [CVE-2009-0029] Rename old_readdir to sys_old_readdir
This way it matches the generic system call name convention.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
2009-01-14 14:15:15 +01:00
David S. Miller 7a6046ebe2 sparc64: Fix UP build failure.
sparc_ksyms_64.c includes asm/spinlock.h directly, which is
a no-no.

Even better, none of these exports are even necessary.  All
of these functions are inlines.

Reported by Meelis Roos and Alexander Beregalov.

Signed-off-by: David S. Miller <davem@davemloft.net>
2009-01-13 17:38:24 -08:00
Linus Torvalds 1181a24499 Merge branch 'core-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'core-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  sparc64: Fix cpumask related build failure
  smp_call_function_single(): be slightly less stupid, fix
  smp_call_function_single(): be slightly less stupid
  rcu: fix bug in rcutorture system-shutdown code
2009-01-12 16:28:26 -08:00
Linus Torvalds 54c266870c Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6:
  sparc: Fix asm/signal.h for 32-bit.
  sparc: Eliminate PROMLIB_INTERNAL as it does nothing
  sparc: Kill exports of prom internal functions
  sparc64: move EXPORT_SYMBOL to the symbols definition
  sparc: move EXPORT_SYMBOL to the symbols definition
  sparc: Create a new file lib/ksyms.c and add export of all symbols defined in assembler in lib/ to this file.
  sparc: Most unaligned_64.c tweaks for branch tracer warnings.
  sparc: Fix sun4d_irq.c build.
  sparc: Update 32-bit defconfig.
  sparc64: fix warnings in psycho_common after ull conversion
2009-01-12 16:22:12 -08:00
David Miller 9d07933709 sparc64: Fix cpumask related build failure
cpumask_of_pcibus() was missing - this triggers on NUMA builds.

Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-01-11 15:33:24 +01:00
David S. Miller fc4dbea733 sparc: Fix asm/signal.h for 32-bit.
Fix a 32-bit sparc regression reported by Robert Reif.

_NSIG_BPW needs to be 32 for 32-bit and 64 for 64-bit

Tested-by: Robert Reif <reif@earthlink.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
2009-01-10 23:44:45 -08:00
Julian Calaby 222bfda032 sparc: Eliminate PROMLIB_INTERNAL as it does nothing
Signed-off-by: Julian Calaby <julian.calaby@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2009-01-08 16:59:01 -08:00
Julian Calaby bc835978cf sparc: Kill exports of prom internal functions
__prom_getchild() and __prom_getsibling() are not used anywhere, so
don't export them.

Signed-off-by: Julian Calaby <julian.calaby@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2009-01-08 16:58:42 -08:00
Sam Ravnborg 917c3660d6 sparc64: move EXPORT_SYMBOL to the symbols definition
Move all applicable EXPORT_SYMBOL()s to the file where the respective
symbol is defined.

Removed all the includes that are no longer needed in sparc_ksyms_64.c

Comment all remaining EXPORT_SYMBOL()s in sparc_ksyms_64.c

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>

Additions by Julian Calaby:
* Moved EXPORT_SYMBOL()s for prom functions to their rightful places.
* Made some minor cleanups to the includes and comments of sparc_ksyms_64.c
* Updated and tidied commit message.
* Rebased patch over sparc-2.6.git HEAD.
* Ensured that all modified files have the correct includes.

Signed-off-by: Julian Calaby <julian.calaby@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2009-01-08 16:58:20 -08:00
Sam Ravnborg 6943f3da3e sparc: move EXPORT_SYMBOL to the symbols definition
Move all applicable EXPORT_SYMBOL()s to the file where the respective
symbol is defined.

Removed all the includes that are no longer needed in sparc_ksyms_32.c

Comment all remaining EXPORT_SYMBOL()s in sparc_ksyms_32.c

Two symbols are shared with sparc64 thus the exports were removed from
the sparc_ksyms_64.c too, along with the include their ommission made
redundant.

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>

Additions by Julian Calaby:
* Moved EXPORT_SYMBOL()s for prom functions to their rightful places.
* Made some minor cleanups to the includes and comments of sparc_ksyms_32.c
* Made another subtraction from sparc_ksyms_64.c
* Updated and tidied commit message.
* Rebased patch over sparc-2.6.git HEAD.
* Ensured that all modified files have the correct includes.

Signed-off-by: Julian Calaby <julian.calaby@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2009-01-08 16:58:05 -08:00
Sam Ravnborg 45536ffc8d sparc: Create a new file lib/ksyms.c and add export of all symbols defined in assembler in lib/ to this file.
Remove the duplicate entries from kernel/sparc_ksyms_*.c

The rationale behind this is that the EXPORT_SYMBOL() should be close to
their definition and we cannot add designate a symbol to be exported in
assembler so at least put it in a file in the same directory.

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>

Additions by Julian Calaby:
* Rebased over sparc-2.6.git HEAD

Signed-off-by: Julian Calaby <julian.calaby@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2009-01-08 16:57:35 -08:00
David S. Miller b41418f48c sparc: Most unaligned_64.c tweaks for branch tracer warnings.
arch/sparc/kernel/unaligned_64.c: In function 'handle_lddfmna':
arch/sparc/kernel/unaligned_64.c:592: warning: 'second' may be used uninitialized in this function

Signed-off-by: David S. Miller <davem@davemloft.net>
2009-01-08 16:52:36 -08:00
David S. Miller a638f25ab0 sparc: Fix sun4d_irq.c build.
Reported by Robert Reif.

Fallout from 'swap' changes.

Signed-off-by: David S. Miller <davem@davemloft.net>
2009-01-08 16:47:17 -08:00
David S. Miller dd5d1241eb sparc: Update 32-bit defconfig.
Signed-off-by: David S. Miller <davem@davemloft.net>
2009-01-08 16:46:17 -08:00
Sam Ravnborg e8dc7c4882 sparc64: fix warnings in psycho_common after ull conversion
After conversion to use unsigned long long for u64
I saw following warnings:

  CC      arch/sparc/kernel/psycho_common.o
arch/sparc/kernel/psycho_common.c: In function `psycho_check_stc_error':
arch/sparc/kernel/psycho_common.c:104: warning: long long unsigned int format, long unsigned int arg (arg 4)
arch/sparc/kernel/psycho_common.c:104: warning: long long unsigned int format, long unsigned int arg (arg 5)
arch/sparc/kernel/psycho_common.c:114: warning: long long unsigned int format, long unsigned int arg (arg 4)
arch/sparc/kernel/psycho_common.c:114: warning: long long unsigned int format, long unsigned int arg (arg 5)
arch/sparc/kernel/psycho_common.c:114: warning: long long unsigned int format, long unsigned int arg (arg 6)
arch/sparc/kernel/psycho_common.c:114: warning: long long unsigned int format, long unsigned int arg (arg 7)
arch/sparc/kernel/psycho_common.c: In function `psycho_dump_iommu_tags_and_data':
arch/sparc/kernel/psycho_common.c:187: warning: long long unsigned int format, long unsigned int arg (arg 8)
arch/sparc/kernel/psycho_common.c:193: warning: long long unsigned int format, long unsigned int arg (arg 6)
arch/sparc/kernel/psycho_common.c: In function `psycho_pcierr_intr':
arch/sparc/kernel/psycho_common.c:333: warning: long long unsigned int format, long unsigned int arg (arg 3)
arch/sparc/kernel/psycho_common.c:333: warning: long long unsigned int format, long unsigned int arg (arg 4)

This is due to different integer promotion in my 32 bit hosted gcc.
The fix is to force a few constants to ULL.

The following stands out from the rest:
+#define  PSYCHO_IOMMU_TAG_VPAGE         0x7ffffULL
+#define  PSYCHO_IOMMU_DATA_PPAGE 0xfffffffULL

They were needed otherwise the expression:

    (data_val & PSYCHO_IOMMU_DATA_PPAGE) << IOMMU_PAGE_SHIFT)

were promoted to a unsigned long and not a unsigned long long as expected.

I tried the alternative solution and made IOMMU_PAGE_SHIFT an ULL but that did not help.
The only way gcc would make this expression an unsigned long long was to
define PSYCHO_IOMMU_DATA_PPAGE as ULL. The alternative to add a cast was
not considered a valid solution.

We had this issue in two places and this were the only places the above
two constants are used.

A small coding style diff sneaked in too. 

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2009-01-08 11:37:19 -08:00
Wu Fengguang 1a8a27c974 generic swap(): sparc: rename swap() to swap_ulong()
In preparation for the introduction of a generic swap() macro.

Signed-off-by: Wu Fengguang <fengguang.wu@intel.com>
Acked-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-01-08 08:31:14 -08:00
Linus Torvalds 9e42d0cf50 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6:
  sparc64: Work around branch tracer warning.
  sparc64: Fix unsigned long long warnings in drivers.
  sparc64: Use unsigned long long for u64.
  sparc: refactor code in fault_32.c
  sparc64: refactor code in init_64.c
  sparc64: refactor code in viohs.c
  sparc: make proces_ver_nack a bit more readable
2009-01-07 17:23:53 -08:00
David S. Miller 18b8e08e29 sparc64: Work around branch tracer warning.
As reported by Sam Ravnborg, Gcc-3.4.5 does not handle:

	if (get_user() || get_user())

with the new branch tracer enabled.

Just seperate it out into seperate statements for now
so people can get work done.

Signed-off-by: David S. Miller <davem@davemloft.net>
2009-01-07 17:15:57 -08:00
Linus Torvalds 57c44c5f6f Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial: (24 commits)
  trivial: chack -> check typo fix in main Makefile
  trivial: Add a space (and a comma) to a printk in 8250 driver
  trivial: Fix misspelling of "firmware" in docs for ncr53c8xx/sym53c8xx
  trivial: Fix misspelling of "firmware" in powerpc Makefile
  trivial: Fix misspelling of "firmware" in usb.c
  trivial: Fix misspelling of "firmware" in qla1280.c
  trivial: Fix misspelling of "firmware" in a100u2w.c
  trivial: Fix misspelling of "firmware" in megaraid.c
  trivial: Fix misspelling of "firmware" in ql4_mbx.c
  trivial: Fix misspelling of "firmware" in acpi_memhotplug.c
  trivial: Fix misspelling of "firmware" in ipw2100.c
  trivial: Fix misspelling of "firmware" in atmel.c
  trivial: Fix misspelled firmware in Kconfig
  trivial: fix an -> a typos in documentation and comments
  trivial: fix then -> than typos in comments and documentation
  trivial: update Jesper Juhl CREDITS entry with new email
  trivial: fix singal -> signal typo
  trivial: Fix incorrect use of "loose" in event.c
  trivial: printk: fix indentation of new_text_line declaration
  trivial: rtc-stk17ta8: fix sparse warning
  ...
2009-01-07 11:31:52 -08:00
Harvey Harrison f4d2b14501 sparc: introduce asm/swab.h
Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-01-06 18:10:27 -08:00
Matthew Wilcox ea43546750 atomic_t: unify all arch definitions
The atomic_t type cannot currently be used in some header files because it
would create an include loop with asm/atomic.h.  Move the type definition
to linux/types.h to break the loop.

Signed-off-by: Matthew Wilcox <willy@linux.intel.com>
Cc: Huang Ying <ying.huang@intel.com>
Cc: <linux-arch@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-01-06 15:59:10 -08:00
Sam Ravnborg 9018113649 sparc64: Use unsigned long long for u64.
Andrew Morton wrote:

    People keep on doing

            printk("%llu", some_u64);

    testing it only on x86_64 and this generates a warning storm on
    powerpc, sparc64, etc.  Because they use `long', not `long long'.

    Quite a few 64-bit architectures are using `long' for their
    s64/u64 types.  We should convert them all to `long long'.

Update types.h so we use unsigned long long for u64 and
fix all warnings in sparc64 code.
Tested with an allnoconfig, defconfig and allmodconfig builds.

This patch introduces additional warnings in several drivers.
These will be dealt with in separate patches.

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2009-01-06 13:19:28 -08:00
Sam Ravnborg 0157141ae2 sparc: refactor code in fault_32.c
The sparc allmodconfig build broke due to enabling of the
branch_tracer that does some very clever things with
all if conditions. This caused my gcc 3.4.5 to be so confused that
it emitted a warning:

arch/sparc/mm/fault_32.c: In function `do_sparc_fault':
arch/sparc/mm/fault_32.c:176: warning: 'fixup' might be used uninitialized in this function

And with -Werror this broke the build.

Refactor code so it:
1) becomes more readable
2) no longer emit a warning with the branch_tracer enabled

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2009-01-06 12:52:41 -08:00
Sam Ravnborg ff9aefbf4d sparc64: refactor code in init_64.c
The sparc64 allmodconfig build broke due to enabling of the
branch_tracer that does some very clever things with
all if conditions. This caused my gcc 3.4.5 to be so confused that
it emitted two warnings:

arch/sparc/mm/init_64.c: In function `update_mmu_cache':
arch/sparc/mm/init_64.c:271: warning: 'pg_flags' might be used uninitialized in this function
arch/sparc/mm/init_64.c:272: warning: 'page' might be used uninitialized in this function

And with -Werror this broke the build.

Refactor code so it:
1) becomes more readable
2) no longer emit a warning with the branch_tracer enabled

The refactoring uses a small helper function (flush_dcache()).

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2009-01-06 12:51:26 -08:00
Sam Ravnborg 2eac5a0d3a sparc64: refactor code in viohs.c
The sparc64 allmodconfig build broke due to enabling of the
branch_tracer that does some very clever things with
all if conditions. This caused my gcc 3.4.5 to be so confused that
it emitted a warning:

arch/sparc/kernel/viohs.c: In function `vio_control_pkt_engine':
arch/sparc/kernel/viohs.c:335: warning: 'nver' might be used uninitialized in this function

And with -Werror this broke the build.

Refactor code so it:
1) becomes more readable
2) no longer emit a warning with the branch_tracer enabled

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2009-01-06 12:46:46 -08:00
Steven Rostedt b2c0805f77 sparc: make proces_ver_nack a bit more readable
Impact: clean up

The code in process_ver_nack is a little obfuscated. This change
makes it a bit more readable by humans. It removes the complex
if statement and replaces it with a cleaner flow of control.

Signed-off-by: Steven Rostedt <srostedt@redhat.com>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2009-01-06 10:23:22 -08:00
Frederik Schwarzer 025dfdafe7 trivial: fix then -> than typos in comments and documentation
- (better, more, bigger ...) then -> (...) than

Signed-off-by: Frederik Schwarzer <schwarzerf@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
2009-01-06 11:28:06 +01:00
Linus Torvalds 7a1fcd5f51 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6: (30 commits)
  sparc: Fix minor SPARC32 compile error
  sparc: Remove reg*.h from Kbuild
  sparc: Clean arch-specific code in prom_common.c
  sparc: Kill asm/reg*.h
  sparc: Use 64BIT config entry
  MAINTAINERS: update sparc maintainer
  sparc: unify ipcbuf.h
  sparc: Update 64-bit defconfig.
  sparc: remove NO_PROC_ID - it is no longer used
  sparc: drop get_tbr() in traps.h
  sparc: fix warning in userspace header traps.h
  sparc: fix warnings in userspace header byteorder.h
  sparc: fix warning in userspace header jsflash.h
  sparc: unify openprom.h
  sparc64: delete unused linux_prom64_ranges from openprom_64.h
  sparc: prepare openprom for unification
  sparc: remove linux_prom_pci_assigned_addresses from openprom_32.h
  sparc: remove ebus definitions from openprom*.h
  sparc: unify siginfo.h
  sparc: unify ptrace.h
  ...
2009-01-05 18:45:06 -08:00
Julian Calaby 4696b64d23 sparc: Fix minor SPARC32 compile error
When CONFIG_PROC_FS is unset, include/linux/interrupt.h defines
init_irq_proc() as an empty function.

arch/sparc/kernel/irq_32.c defines this function unconditionally.

Fix the latter so that it only defines this function when CONFIG_PROC_FS
is set.

This fixes the following error:
arch/sparc/kernel/irq_32.c:672: error: redefinition of 'init_irq_proc'
include/linux/interrupt.h:461: error: previous definition of
'init_irq_proc' was here

This was found using randconfig builds.

Signed-off-by: Julian Calaby <julian.calaby@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2009-01-05 18:13:49 -08:00
David S. Miller 576b4d0cce sparc: Remove reg*.h from Kbuild
Forgot to commit this in previous change, noticed by
Sam.

Signed-off-by: David S. Miller <davem@davemloft.net>
2009-01-05 00:55:24 -08:00
Julian Calaby 47cd5265ea sparc: Clean arch-specific code in prom_common.c
prom_nextprop() and prom_firstprop() have slightly different calling
conventions in 32 and 64 bit SPARC.

prom_common.c uses a ifdef guard to ensure that these functions are
called correctly.

Adjust code to eliminate this ifdef by using a calling convention that
is compatible with both 32 and 64 bit SPARC.

Signed-off-by: Julian Calaby <julian.calaby@gmail.com>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2009-01-05 00:07:18 -08:00