8MB is not really very random, use 1GB (or more with larger page sizes)
instead.

Also use the low bits of the random generator output now instead of
throwing them away.

Only enabled on x86-64 right now. Other architectures need to add
a suitable STACK_RND_MASK

Cc: mingo@elte.hu
Signed-off-by: NAndi Kleen <ak@suse.de>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

The upcomming gcc 4.2 got a new option -mtune=generic to tune
code for both common AMD and Intel CPUs. Use this option
when available for generic kernels.

On x86-64 it is used with CONFIG_GENERIC_CPU. On i386 it is
enabled with CONFIG_X86_GENERIC.  It won't affect the base
line CPU support in any ways and also not the minimum supported CPU.
Signed-off-by: NAndi Kleen <ak@suse.de>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

Memory >39bits has a different PUD.

Cc: "Tolentino, Matthew E" <matthew.e.tolentino@intel.com>
Signed-off-by: NAndi Kleen <ak@suse.de>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

Signed-off-by: NAndi Kleen <ak@suse.de>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

* master.kernel.org:/pub/scm/linux/kernel/git/davej/cpufreq:
  [CPUFREQ] kzalloc conversion for gx-suspmod
  [CPUFREQ] Whitespace cleanup
  [CPUFREQ] Mark longhaul driver as broken.
  [PATCH] cpufreq: fix section mismatch warnings
  [CPUFREQ] Fix the p4-clockmod N60 errata workaround.
  [CPUFREQ] Fix handling for CPU hotplug
  [CPUFREQ] powernow-k8: Let cpufreq driver handle affected CPUs
  [CPUFREQ] Lots of whitespace & CodingStyle cleanup.
  [CPUFREQ] Remove duplicate cpuinfo struct
  [CPUFREQ] Silence powernow-k8 warning on k7's.

* 'for-linus' of master.kernel.org:/pub/scm/linux/kernel/git/roland/infiniband:
  IPoIB: P_Key change event handling
  IB/mthca: Fix modify QP error path
  IPoIB: Fix network interface "RUNNING" status
  IB/mthca: Fix indentation
  IB/mthca: Fix uninitialized variable in mthca_alloc_qp()
  IB/mthca: Check SRQ limit in modify SRQ operation
  IB/mthca: Check that SRQ WQE size does not exceed device's max value
  IB/mthca: Check that sgid_index and path_mtu are valid in modify_qp
  IB/srp: Use a fake scatterlist for non-SG SCSI commands
  IPoIB: Pass correct pointer when flushing child interfaces

* 'upstream-linus' of git://oss.oracle.com/home/sourcebo/git/ocfs2:
  ocfs2: finally remove MLF* macros
  ocfs2: don't use MLF* in the file system
  ocfs2: don't use MLF* in dlm/ files
  ocfs2: don't use MLF* in cluster/ files
  [PATCH] ocfs2: dlm recovery fixes
  [PATCH] ocfs2: fix hang in dlm lock resource mastery
  ocfs2: use __attribute__ format

* 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6:
  [IA64] New IA64 core/thread detection patch
  [IA64] Increase max node count on SN platforms
  [IA64] Increase max node count on SN platforms
  [IA64] Increase max node count on SN platforms
  [IA64] Increase max node count on SN platforms
  [IA64] Tollhouse HP: IA64 arch changes
  [IA64] cleanup dig_irq_init
  [IA64] MCA recovery: kernel context recovery table
  IA64: Use early_parm to handle mvec_name and nomca
  [IA64] move patchlist and machvec into init section
  [IA64] add init declaration - nolwsys
  [IA64] add init declaration - gate page functions
  [IA64] add init declaration to memory initialization functions
  [IA64] add init declaration to cpu initialization functions
  [IA64] add __init declaration to mca functions
  [IA64] Ignore disabled Local SAPIC Affinity Structure in SRAT
  [IA64] sn_check_intr: use ia64_get_irr()
  [IA64] fix ia64 is_hugepage_only_range

* master.kernel.org:/pub/scm/linux/kernel/git/sam/kbuild: (46 commits)
  kbuild: remove obsoleted scripts/reference_* files
  kbuild: fix make help & make *pkg
  kconfig: fix time ordering of writes to .kconfig.d and include/linux/autoconf.h
  Kconfig: remove the CONFIG_CC_ALIGN_* options
  kbuild: add -fverbose-asm to i386 Makefile
  kbuild: clean-up genksyms
  kbuild: Lindent genksyms.c
  kbuild: fix genksyms build error
  kbuild: in makefile.txt note that Makefile is preferred name for kbuild files
  kbuild: replace PHONY with FORCE
  kbuild: Fix bug in crc symbol generating of kernel and modules
  kbuild: change kbuild to not rely on incorrect GNU make behavior
  kbuild: when warning symbols exported twice now tell user this is the problem
  kbuild: fix make dir/file.xx when asm symlink is missing
  kbuild: in the section mismatch check try harder to find symbols
  kbuild: fix section mismatch check for unwind on IA64
  kbuild: kill false positives from section mismatch warnings for powerpc
  kbuild: kill trailing whitespace in modpost & friends
  kbuild: small update of allnoconfig description
  kbuild: make namespace.pl CROSS_COMPILE happy
  ...

Trivial conflict in arch/ppc/boot/Makefile manually fixed up

Hugh is rightly concerned that the CONFIG_DEBUG_VM coverage has gone too
far in vm_normal_page, considering that we expect production kernels to be
shipped with the option turned off, and that the code has been under some
large changes recently.
Signed-off-by: NNick Piggin <npiggin@suse.de>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

Fix bug identified by Linus Torvalds <torvalds@osdl.org>: the `out'
instruction depends upon the state of memory_data[], so we need to tell gcc
that before executing it. (The opcode, not gcc).

Fixes http://bugzilla.kernel.org/show_bug.cgi?id=5553

Thanks to Antonio Ospite <ospite@studenti.unina.it> for testing.

Cc: Dave Jones <davej@codemonkey.org.uk>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

* git://git.kernel.org/pub/scm/linux/kernel/git/bunk/trivial: (21 commits)
  BUG_ON() Conversion in drivers/video/
  BUG_ON() Conversion in drivers/parisc/
  BUG_ON() Conversion in drivers/block/
  BUG_ON() Conversion in sound/sparc/cs4231.c
  BUG_ON() Conversion in drivers/s390/block/dasd.c
  BUG_ON() Conversion in lib/swiotlb.c
  BUG_ON() Conversion in kernel/cpu.c
  BUG_ON() Conversion in ipc/msg.c
  BUG_ON() Conversion in block/elevator.c
  BUG_ON() Conversion in fs/coda/
  BUG_ON() Conversion in fs/binfmt_elf_fdpic.c
  BUG_ON() Conversion in input/serio/hil_mlc.c
  BUG_ON() Conversion in md/dm-hw-handler.c
  BUG_ON() Conversion in md/bitmap.c
  The comment describing how MS_ASYNC works in msync.c is confusing
  rcu: undeclared variable used in documentation
  fix typos "wich" -> "which"
  typo patch for fs/ufs/super.c
  Fix simple typos
  tabify drivers/char/Makefile
  ...

* master.kernel.org:/pub/scm/linux/kernel/git/davem/sparc-2.6:
  [SPARC]: Try to start getting SMP back into shape.

* master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6:
  [NETFILTER] x_table.c: sem2mutex
  [IPV4]: Aggregate route entries with different TOS values
  [TCP]: Mark tcp_*mem[] __read_mostly.
  [TCP]: Set default max buffers from memory pool size
  [SCTP]: Fix up sctp_rcv return value
  [NET]: Take RTNL when unregistering notifier
  [WIRELESS]: Fix config dependencies.
  [NET]: Fill in a 32-bit hole in struct sock on 64-bit platforms.
  [NET]: Ensure device name passed to SO_BINDTODEVICE is NULL terminated.
  [MODULES]: Don't allow statically declared exports
  [BRIDGE]: Unaligned accesses in the ethernet bridge

* master.kernel.org:/pub/scm/linux/kernel/git/mchehab/v4l-dvb: (33 commits)
  V4L/DVB (3604): V4l printk fix
  V4L/DVB (3599c): Whitespace cleanups under Documentation/video4linux
  V4L/DVB (3599b): Whitespace cleanups under drivers/media
  V4L/DVB (3599a): Move drivers/usb/media to drivers/media/video
  V4L/DVB (3599): Implement new routing commands for wm8775 and cs53l32a.
  V4L/DVB (3598): Add bit algorithm adapter for the Conexant CX2341X boards.
  V4L/DVB (3597): Vivi: fix warning: implicit declaration of function 'in_interrupt'
  V4L/DVB (3588): Remove VIDIOC_G/S_AUDOUT from msp3400
  V4L/DVB (3587): Always wake thread after routing change.
  V4L/DVB (3584): Implement V4L2_TUNER_MODE_LANG1_LANG2 audio mode
  V4L/DVB (3582): Implement correct msp3400 input/output routing
  V4L/DVB (3581): Add new media/msp3400.h header containing the routing macros
  V4L/DVB (3580): Last round of msp3400 cleanups before adding routing commands
  V4L/DVB (3579): Move msp_modus to msp3400-kthreads, add JP and KR std detection
  V4L/DVB (3578): Make scart definitions easier to handle
  V4L/DVB (3577): Cleanup audio input handling
  V4L/DVB (3575): Cxusb: fix i2c debug messages for bluebird devices
  V4L/DVB (3574): Cxusb: fix debug messages
  V4L/DVB (3573): Cxusb: remove FIXME: comment in bluebird_patch_dvico_firmware_download
  V4L/DVB (3572): Cxusb: conditionalize gpio write for the medion box
  ...

drivers/scsi/sd.c: In function `sd_store_cache_type':
drivers/scsi/sd.c:193: warning: comparison of distinct pointer types lacks a cast

Cc: James Bottomley <James.Bottomley@steeleye.com>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

Thanks "Randy.Dunlap" <rdunlap@xenotime.net>

Cc: "Randy.Dunlap" <rdunlap@xenotime.net>
Signed-off-by: NNeil Brown <neilb@suse.de>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

This removes the support for pps.  It's completely unused within the kernel
and is basically in the way for further cleanups.  It should be easier to
readd proper support for it after the rest has been converted to NTP4
(where the pps mechanisms are quite different from NTP3 anyway).
Signed-off-by: NRoman Zippel <zippel@linux-m68k.org>
Cc: Adrian Bunk <bunk@stusta.de>
Cc: john stultz <johnstul@us.ibm.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

Merge mpsc.h into mpsc.c because its the only file that #include's mpsc.h.
Signed-off-by: NMark A. Greer <mgreer@mvista.com>
Cc: Russell King <rmk@arm.linux.org.uk>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

The definition of SUPPORT_SYSRQ must come before #include of serial_core.h.
This patch moves the definition of SUPPORT_SYSRQ to be just after the #include
of config.h to make it consistent with 8250.c.
Reported-by: NStephane Chazelas <Stephane@artesyncp.com>
Signed-off-by: NMark A. Greer <mgreer@mvista.com>
Cc: Russell King <rmk@arm.linux.org.uk>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

The devname passed to request_irq() contained a '/' which is wrong.  At
a minimum, the '/' prevented the devname from showing up in
/proc/irq/<irq>/<devname>.  This patch replaces the '/' with a '-' to
fixes that problem.
Reported-by: NStephane Chazelas <Stephane@artesyncp.com>
Signed-off-by: NMark A. Greer <mgreer@mvista.com>
Cc: Russell King <rmk@arm.linux.org.uk>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

'int dev' came out of an 'unsigned char *' - as such, it will not get
a negative value. Thanks Valdis.
Signed-off-by: NEugene Teo <eugene.teo@eugeneteo.net>
Cc: Jaroslav Kysela <perex@suse.cz>
Acked-by: NTakashi Iwai <tiwai@suse.de>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

In binfmt_flat.c, the flat binary loader should check file descriptor table
and install the fd on the file.

Convert the function to single-exit and fix this bug.
Signed-off-by: N"Luke Yang" <luke.adi@gmail.com>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

Add support for SA_PERCPU_IRQ (only mmtimer.c uses this at this stage).
Signed-off-by: NDimitri Sivanich <sivanich@sgi.com>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

nr_segs is unsigned long and thus cannot be negative.  We checked against 0
few lines before.
Signed-off-by: NCarsten Otte <cotte@de.ibm.com>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

Local variable i is unsigned int and thus cannot be negative.

(akpm: unsigneds shouldn't be called `i'.  This value cannot possibly be
negative anyway).
Signed-off-by: NCarsten Otte <cotte@de.ibm.com>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

Fix Documentation/firmware_class/ examples so that they will build.
Signed-off-by: NRandy Dunlap <rdunlap@xenotime.net>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

This patch removes duplicate definitions from include/linux/udf_fs_i.h
which are already defined in fs/udf/ecma_167.h.
Signed-off-by: NPekka Enberg <penberg@cs.helsinki.fi>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

Signed-off-by: NRalf Baechle <ralf@linux-mips.org>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

This patch avoids arithmetic on 'signed' types that are slower than
'unsigned'.  This saves space and cpu cycles.

size of kernel/sys.o before the patch (gcc-3.4.5)

    text    data     bss     dec     hex filename
   10924     252       4   11180    2bac kernel/sys.o

size of kernel/sys.o after the patch
    text    data     bss     dec     hex filename
   10903     252       4   11159    2b97 kernel/sys.o

I noticed that gcc-4.1.0 (from Fedora Core 5) even uses idiv instruction for
(a+b)/2 if a and b are signed.
Signed-off-by: NEric Dumazet <dada1@cosmosbay.com>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

- Moved check for online cpu out of smp_prepare_cpu()

- Moved default declaration of smp_prepare_cpu() to kernel/cpu.c

- Removed lock_cpu_hotplug() from smp_prepare_cpu() to around it, since
  its called from cpu_up() as well now.

- Removed clearing from cpu_present_map during cpu_offline as it breaks
  using cpu_up() directly during a subsequent online operation.
Signed-off-by: NAshok Raj <ashok.raj@intel.com>
Cc: Srivatsa Vaddagiri <vatsa@in.ibm.com>
Cc: "Li, Shaohua" <shaohua.li@intel.com>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

Add info on flow control for serial consoles.  Refer to netconsole option
also.
Signed-off-by: NRandy Dunlap <rdunlap@xenotime.net>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

There is a bug in direct-io on propagating write error up to the higher I/O
layer.  When performing an async ODIRECT write to a block device, if a
device error occurred (like media error or disk is pulled), the error code
is only propagated from device driver to the DIO layer.  The error code
stops at finished_one_bio().  The aysnc write, however, is supposedly have
a corresponding AIO event with appropriate return code (in this case -EIO).
 Application which waits on the async write event, will hang forever since
such AIO event is lost forever (if such app did not use the timeout option
in io_getevents call.  Regardless, an AIO event is lost).

The discovery of above bug leads to another discovery of potential race
window with dio->result.  The fundamental problem is that dio->result is
overloaded with dual use: an indicator of fall back path for partial dio
write, and an error indicator used in the I/O completion path.  In the
event of device error, the setting of -EIO to dio->result clashes with
value used to track partial write that activates the fall back path.

It was also pointed out that it is impossible to use dio->result to track
partial write and at the same time to track error returned from device
driver.  Because direct_io_work can only determines whether it is a partial
write at the end of io submission and in mid stream of those io submission,
a return code could be coming back from the driver.  Thus messing up all
the subsequent logic.

Proposed fix is to separating out error code returned by the IO completion
path from partial IO submit tracking.  A new variable is added to dio
structure specifically to track io error returned in the completion path.
Signed-off-by: NKen Chen <kenneth.w.chen@intel.com>
Acked-by: NZach Brown <zach.brown@oracle.com>
Acked-by: NSuparna Bhattacharya <suparna@in.ibm.com>
Cc: Badari Pulavarty <pbadari@us.ibm.com>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

As Pekka Enberg pointed out, with the if still following the else, you can
still get a null uid written to the disk if you specify a default uid= without
uid=forget.  In other words, if the desktop user is uid=1000 and the mount
option uid=1000 is given ( which is done on ubuntu automatically and probably
other distributions that use hal ), then if any other user besides uid 1000
owns a file then a 0 will be written to the media as the owning uid instead.
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

Signed-off-by: NOliver Neukum <oliver@neukum.name>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

Spotted by the Coverity checker as bug #666

akpm; there are several other `return 1;'s in there which aren't freeing
`dev'.  (A fix which converts this function to single-exit would be
preferred..)
Signed-off-by: NJesper Juhl <jesper.juhl@gmail.com>
Cc: Adam Belay <ambx1@neo.rr.com>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

Fix resource leak and remove pointless cast of kmalloc return value.
Signed-off-by: NJesper Juhl <jesper.juhl@gmail.com>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

           text    data     bss     dec     hex filename
before: 3605597 1363528  363328 5332453  515de5 vmlinux
after:  3605295 1363612  363200 5332107  515c8b vmlinux

218 bytes saved.

Also, optimise any_online_cpu() out of existence on CONFIG_SMP=n.

This function seems inefficient.  Can't we simply AND the two masks, then use
find_first_bit()?

Cc: Paul Jackson <pj@sgi.com>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

Shrinks the only caller (net/bridge/netfilter/ebtables.c) by 174 bytes.

Also, optimise highest_possible_processor_id() out of existence on
CONFIG_SMP=n.

Cc: Paul Jackson <pj@sgi.com>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

           text    data     bss     dec     hex filename
before: 3488027 1322496  360128 5170651  4ee5db vmlinux
after:  3485112 1322480  359968 5167560  4ed9c8 vmlinux

2931 bytes saved

Cc: Paul Jackson <pj@sgi.com>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>