This should make sure that, for UML, host's configuration files are not
considered, which avoids various pains to the user. Our dependency are such
that the obtained Kconfig will be valid and will lead to successful
compilation - however they cannot prevent an user from disabling any boot
device, and if an option is not set in the read .config (say
/boot/config-XXX), with make menuconfig ARCH=um, it is not set. This always
disables UBD and all console I/O channels, which leads to non-working UML
kernels, so this bothers users - especially now, since it will happen on
almost every machine (/boot/config-`uname -r` exists almost on every machine).
It can be workarounded with make defconfig ARCH=um, but it is non-obvious and
can be avoided, so please _do_ merge this patch.
Given the existence of options, it could be interesting to implement
(additionally) "option required" - with it, Kconfig will refuse reading a
.config file (from wherever it comes) if the given option is not set. With
this, one could mark with it the option characteristic of the given
architecture (it was an old proposal of Roman Zippel, when I pointed out our
problem):
config UML
option required
default y
However this should be further discussed:
*) for x86, it must support constructs like:
==arch/i386/Kconfig==
config 64BIT
option required
default n
where Kconfig must require that CONFIG_64BIT is disabled or not present in the
read .config.
*) do we want to do such checks only for the starting defconfig or also for
.config? Which leads to:
*) I may want to port a x86_64 .config to x86 and viceversa, or even among more
different archs. Should that be allowed, and in which measure (the user may
force skipping the check for a .config or it is only given a warning by
default)?
Cc: Roman Zippel <zippel@linux-m68k.org>
Cc: <kbuild-devel@lists.sourceforge.net>
Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it>
Cc: Jeff Dike <jdike@addtoit.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
CONFIG_MODE_TT does not work there, the UML_ prefixed version must be used -
this causes a link-time failure when CONFIG_MODE_TT is enabled (i.e. always
here, never by Jeff).
Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it>
Cc: Jeff Dike <jdike@addtoit.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Fix coding conventions violations is arch/um/os-Linux/helper.c.
Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it>
Cc: Jeff Dike <jdike@addtoit.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
user.h is too generic a header name. I've split out allocation routines from
it.
Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it>
Cc: Jeff Dike <jdike@addtoit.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
I happened to notice that this code is a leftover and it should be removed -
since there are sporadical efforts to revive the PPC port doing such cleanups
is not useless.
Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it>
Cc: Jeff Dike <jdike@addtoit.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Fix cut'n'paste typo - &a and &b are used in other examples, in this one
the doc uses &u and &v.
Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it>
Acked-by: David Howells <dhowells@redhat.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
arch/um/sys-x86_64/ptrace.c:20:1: warning: "SC_SS" redefined
In file included from arch/um/include/sysdep/ptrace.h:18,
from include/asm/ptrace-generic.h:12,
from include/asm/ptrace.h:15,
from arch/um/sys-x86_64/ptrace.c:8:
arch/um/include/sysdep/sc.h:38:1: warning: this is the location of the previous definition
arch/um/sys-x86_64/ptrace.c: In function 'putreg':
arch/um/sys-x86_64/ptrace.c:63: warning: implicit declaration of function 'SC_FS_BASE'
arch/um/sys-x86_64/ptrace.c:63: error: invalid lvalue in unary '&'
arch/um/sys-x86_64/ptrace.c:63: warning: implicit declaration of function 'SC_GS_BASE'
arch/um/sys-x86_64/ptrace.c:63: error: invalid lvalue in unary '&'
arch/um/sys-x86_64/ptrace.c: In function 'getreg':
arch/um/sys-x86_64/ptrace.c:101: error: invalid lvalue in unary '&'
arch/um/sys-x86_64/ptrace.c:101: error: invalid lvalue in unary '&'
I'd have to say that the fix for this, for now, is this:
Cc: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
<linux/personality.h> contains the constants for personality(2) but also
some defintions that are useless or even harmful in userspace such as the
personality() macro.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Separate out the concept of "queue congestion" from "backing-dev congestion".
Congestion is a backing-dev concept, not a queue concept.
The blk_* congestion functions are retained, as wrappers around the core
backing-dev congestion functions.
This proper layering is needed so that NFS can cleanly use the congestion
functions, and so that CONFIG_BLOCK=n actually links.
Cc: "Thomas Maier" <balagi@justmail.de>
Cc: "Jens Axboe" <jens.axboe@oracle.com>
Cc: Trond Myklebust <trond.myklebust@fys.uio.no>
Cc: David Howells <dhowells@redhat.com>
Cc: Peter Osterlund <petero2@telia.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Export the clear_queue_congested() and set_queue_congested() functions
located in ll_rw_blk.c
The functions are renamed to blk_clear_queue_congested() and
blk_set_queue_congested().
(needed in the pktcdvd driver's bio write congestion control)
Signed-off-by: Thomas Maier <balagi@justmail.de>
Cc: Peter Osterlund <petero2@telia.com>
Cc: Jens Axboe <jens.axboe@oracle.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Use the special_file() macro to check whether an inode is special instead of
open-coding it.
Acked-by: Mike Halcrow <mhalcrow@us.ibm.com>
Cc: Phillip Hellewell <phillip@hellewell.homeip.net>
Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
When direct-io falls back to buffered write, it will just leave the dirty data
floating about in pagecache, pending regular writeback.
But normal direct-io semantics are that IO is synchronous, and that it leaves
no pagecache behind.
So change the fallback-to-buffered-write code to sync the file region and to
then strip away the pagecache, just as a regular direct-io write would do.
Acked-by: Jeff Moyer <jmoyer@redhat.com>
Cc: Zach Brown <zach.brown@oracle.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
When rebooting with netconsole over e100, the driver shutdown code would
deadlock with netpoll. Reduce shutdown code to a bare minimum while retaining
WoL and suspend functionality.
Signed-off-by: Auke Kok <auke-jan.h.kok@intel.com>
Cc: Jeff Garzik <jeff@garzik.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
In the "if (extlen)" case, "bh" was used uninitialized.
This patch changes the code to what seems to have been intended.
Spotted by the Coverity checker.
This patch also removes a pointless "bh = NULL" asignment (the variable
is never accessed again after this point).
Signed-off-by: Adrian Bunk <bunk@stusta.de>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
Don't dereference new->s_root when we do know it's NULL.
Spotted by the Coverity checker.
Signed-off-by: Adrian Bunk <bunk@stusta.de>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
In the "if (extlen)" case, "new" might be used uninitialized.
Looking at the code, it should be initialized to 0.
Spotted by the Coverity checker.
Signed-off-by: Adrian Bunk <bunk@stusta.de>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
The Coverity checker spotted this obviously dead code.
Signed-off-by: Adrian Bunk <bunk@stusta.de>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
This fix means that bmap will map extents of the length requested
by the VFS rather than guessing at it, or just mapping one block
at a time. The other callers of gfs2_block_map are audited to ensure
they send the correct max extent lengths (i.e. set bh->b_size correctly).
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
I didn't spot that the msg_iovlen was set to 2 if there
were two elements in the iovec but left at zero if not :(
I think this might be why bob was still seeing trouble.
Signed-Off-By: Patrick Caulfield <pcaulfie@redhat.com>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
The latest HID disconnect sequence change introduced a NULL pointer
dereference. For the quirk to handle buggy remote HID implementations,
it is enough to wait for a potential control channel disconnect from
the remote side and it is also enough to wait only 500 msecs.
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
The device id for the Nokia DTL-4 PCMCIA card was missing. This patch
adds it back to the list of supported devices.
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
This patch adds the vendor and product id of the ANYCOM Bluetooth
USB-200 and USB-250 dongles and sets a flag to send HCI_Reset as
the first command.
Signed-off-by: Marcel Holtmann <marcel@holtmann.org
As BHs are off in loopback_xmit(), preemption cannot occurs, so we can
use __get_cpu_var() instead of per_cpu() (and avoid a
preempt_enable()/preempt_disable() pair)
Signed-off-by: Eric Dumazet <dada1@cosmosbay.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
We don't need to export sparc_elf_hwcap() to userspace, and it doesn't
build there. Remove it by moving it inside #ifdef __KERNEL__, along with
some other things which don't need to be exported.
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Lot of routers/embedded devices still use CPUS with 16/32 bytes cache
lines. (486, Pentium, ... PIII) It makes sense to group together
fields used at lookup time so they fit in one cache line. This reduce
cache footprint and speedup lookups.
Signed-off-by: Eric Dumazet <dada1@cosmosbay.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
I believe this NET_INC_STATS() call can be replaced by
NET_INC_STATS_BH(), a little bit cheaper.
Signed-off-by: Eric Dumazet <dada1@cosmosbay.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
The 32bit compatibility layer has no CAP_NET_ADMIN check in
compat_do_ipt_get_ctl, which for example allows to list the current
iptables rules even without having that capability (the non-compat
version requires it). Other capabilities might be required to exploit
the bug (eg. CAP_NET_RAW to get the nfnetlink socket?), so a plain user
can't exploit it, but a setup actually using the posix capability system
might very well hit such a constellation of granted capabilities.
Signed-off-by: Björn Steinbrink <B.Steinbrink@gmx.de>
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
Need to fully initialize skb to keep lower layers and queueing happy.
Signed-off-by: Stephen Hemminger <shemminger@osdl.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
With the existing prototype the following code:
const void __iomem *io = ioremap();
x = readb(io);
iounmap(io);
did result in a warning.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
In the current pnx8550-v2pci_defconfig CONFIG_SGI_IP22 has been selected.
Signed-off-by: Yoichi Yuasa <yoichi_yuasa@tripeaks.co.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
In the current pnx8550-jbs_defconfig CONFIG_SGI_IP22 has been selected.
Signed-off-by: Yoichi Yuasa <yoichi_yuasa@tripeaks.co.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
CONFIG_KALLSYMS=n case is obviously wrong, though it is harmless since
CONFIG_KALLSYMS is always enabled with CONFIG_STACKTRACE for now.
Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
A sign extension bug did result in sys_personality being invoked with a
0xffffffffffffffffUL argument, so querying the current personality didn't
work.
Signed-off-by: Thiemo Seufer <ths@networkno.de>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This new routine doesn't lookup for symbol names. So we needn't
to pass any char buffers or pointer since we don't care about
names.
Signed-off-by: Franck Bui-Huu <fbuihuu@gmail.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
The minimum tx ring size must be greater than MAX_SKB_FRAGS or 3
times that on some chips with TSO bugs.
Signed-off-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Fixes the implementation of the ethtool set ring parameters for the
tg3 transmit ring. The size of tx_pending is taken into account
before doing a netif_wake_queue. This prevents the interface from
locking up when smaller transmit ring sizes are used.
Signed-off-by: Ranjit Manomohan <ranjitm@google.com>
Acked-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
We dont need a full struct net_device_stats (currently 23 long : 184 bytes on
x86_64) per possible CPU, but only two counters : bytes and packets
We save few CPU cycles too in loopback_xmit() not updating 4 fields, but 2.
Signed-off-by: Eric Dumazet <dada1@cosmosbay.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Paolo 'Blaisorblade' Giarrusso
Jeff Dike
Ralf Baechle
Andrew Morton
Thomas Maier
Pekka Enberg
Jeff Moyer
Auke Kok
Adrian Bunk
Al Viro
Steven Whitehouse
Patrick Caulfield
Marcel Holtmann
Eric Dumazet
David Woodhouse
Björn Steinbrink
Stephen Hemminger
David S. Miller
Yoichi Yuasa
Atsushi Nemoto
Thiemo Seufer
Franck Bui-Huu
Michael Chan
Ranjit Manomohan