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Commit Graph

110450 Commits

Author SHA1 Message Date
Michael Kerrisk
bd7ebec64d MAINTAINERS: add mailing list for man-pages
Nowadays, man-pages has an associated mailing list.  Mention that list
in MAINTAINERS.

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-10-03 18:22:18 -07:00
Paul Jackson
c222817f6a cpusets: remove pj from cpuset maintainers
Remove myself from the kernel MAINTAINERS file for cpusets.  I am leaving
SGI and probably will not be active in Linux kernel work.  I can be
reached at <pj@usa.net>.  Contact Derek Fults <dfults@sgi.com> for future
SGI+cpuset related issues.  I'm off to the next chapter of this good life.

Signed-off-by: Paul Jackson <pj@sgi.com>
Cc: Paul Menage <menage@google.com>
Cc: Derek Fults <dfults@sgi.com>
Cc: John Hesterberg <jh@sgi.com>
Cc: Paul Jackson <pj@usa.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-10-03 18:22:18 -07:00
Andrew Morton
897312bd24 include/linux/stacktrace.h: declare struct task_struct
include/linux/stacktrace.h:13: warning:
 'struct task_struct' declared inside parameter list

(This might be a hard error on sparc64, which uses this header and has
-Werror)

Reported-by: "Randy.Dunlap" <rdunlap@xenotime.net>
Acked-by: Ingo Molnar <mingo@elte.hu>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Arjan van de Ven <arjan@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-10-03 18:22:18 -07:00
Lennert Buytenhek
f2fe1638f6 orion_spi: fix handling of default transfer speed
Accept zero (the default!) as a per-transfer clock speed override.

Signed-off-by: Lennert Buytenhek <buytenh@marvell.com>
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-10-03 18:22:18 -07:00
Krzysztof Helt
aef7db4bd5 fbdev: fix recursive notifier and locking when fbdev console is blanked
Fix infinite recursive notifier in the fbdev layer.  This causes recursive
locking.  Dmitry Baryshkov found the problem and confirmed that the patch
fixes the bug.

After doing
# echo 1 > /sys/class/graphics/fb0/blank
I got the following in my kernel log:

=============================================
[ INFO: possible recursive locking detected ]
2.6.27-rc6-00086-gda63874-dirty #97
---------------------------------------------
echo/1564 is trying to acquire lock:
 ((fb_notifier_list).rwsem){..--}, at: [<c005a384>] __blocking_notifier_call_chain+0x38/0x6c

but task is already holding lock:
 ((fb_notifier_list).rwsem){..--}, at: [<c005a384>] __blocking_notifier_call_chain+0x38/0x6c

other info that might help us debug this:
2 locks held by echo/1564:
 #0:  (&buffer->mutex){--..}, at: [<c00ddde0>] sysfs_write_file+0x30/0x80
 #1:  ((fb_notifier_list).rwsem){..--}, at: [<c005a384>] __blocking_notifier_call_chain+0x38/0x6c

stack backtrace:
[<c0029fe4>] (dump_stack+0x0/0x14) from [<c0060ce0>] (print_deadlock_bug+0xa4/0xd0)
[<c0060c3c>] (print_deadlock_bug+0x0/0xd0) from [<c0060e54>] (check_deadlock+0x148/0x17c)
 r6:c397a1e0 r5:c397a530 r4:c04fcf98
[<c0060d0c>] (check_deadlock+0x0/0x17c) from [<c00637e8>] (validate_chain+0x3c4/0x4f0)
[<c0063424>] (validate_chain+0x0/0x4f0) from [<c0063efc>] (__lock_acquire+0x5e8/0x6b4)
[<c0063914>] (__lock_acquire+0x0/0x6b4) from [<c006402c>] (lock_acquire+0x64/0x78)
[<c0063fc8>] (lock_acquire+0x0/0x78) from [<c0316ca8>] (down_read+0x4c/0x60)
 r7:00000009 r6:ffffffff r5:c0427a40 r4:c005a384
[<c0316c5c>] (down_read+0x0/0x60) from [<c005a384>] (__blocking_notifier_call_chain+0x38/0x6c)
 r5:c0427a40 r4:c0427a74
[<c005a34c>] (__blocking_notifier_call_chain+0x0/0x6c) from [<c005a3d8>] (blocking_notifier_call_chain+0x20/0x28)
 r8:00000009 r7:c086d640 r6:c3967940 r5:00000000 r4:c38984b8
[<c005a3b8>] (blocking_notifier_call_chain+0x0/0x28) from [<c014baa0>] (fb_notifier_call_chain+0x1c/0x24)
[<c014ba84>] (fb_notifier_call_chain+0x0/0x24) from [<c014c18c>] (fb_blank+0x64/0x70)
[<c014c128>] (fb_blank+0x0/0x70) from [<c0155978>] (fbcon_blank+0x114/0x1bc)
 r5:00000001 r4:c38984b8
[<c0155864>] (fbcon_blank+0x0/0x1bc) from [<c0170ea8>] (do_blank_screen+0x1e0/0x2a0)
[<c0170cc8>] (do_blank_screen+0x0/0x2a0) from [<c0154024>] (fbcon_fb_blanked+0x74/0x94)
 r5:c3967940 r4:00000001
[<c0153fb0>] (fbcon_fb_blanked+0x0/0x94) from [<c0154228>] (fbcon_event_notify+0x100/0x12c)
 r5:fffffffe r4:c39bc194
[<c0154128>] (fbcon_event_notify+0x0/0x12c) from [<c005a0d4>] (notifier_call_chain+0x38/0x7c)
[<c005a09c>] (notifier_call_chain+0x0/0x7c) from [<c005a3a0>] (__blocking_notifier_call_chain+0x54/0x6c)
 r8:c3b51ea0 r7:00000009 r6:ffffffff r5:c0427a40 r4:c0427a74
[<c005a34c>] (__blocking_notifier_call_chain+0x0/0x6c) from [<c005a3d8>] (blocking_notifier_call_chain+0x20/0x28)
 r8:00000001 r7:c3a7e000 r6:00000000 r5:00000000 r4:c38984b8
[<c005a3b8>] (blocking_notifier_call_chain+0x0/0x28) from [<c014baa0>] (fb_notifier_call_chain+0x1c/0x24)
[<c014ba84>] (fb_notifier_call_chain+0x0/0x24) from [<c014c18c>] (fb_blank+0x64/0x70)
[<c014c128>] (fb_blank+0x0/0x70) from [<c014e450>] (store_blank+0x54/0x7c)
 r5:c38984b8 r4:c3b51ec4
[<c014e3fc>] (store_blank+0x0/0x7c) from [<c017981c>] (dev_attr_store+0x28/0x2c)
 r8:00000001 r7:c042bf80 r6:c39eba10 r5:c3967c30 r4:c38e0140
[<c01797f4>] (dev_attr_store+0x0/0x2c) from [<c00ddaac>] (flush_write_buffer+0x54/0x68)
[<c00dda58>] (flush_write_buffer+0x0/0x68) from [<c00dde08>] (sysfs_write_file+0x58/0x80)
 r8:c3b51f78 r7:c3bcb070 r6:c39eba10 r5:00000001 r4:00000001
[<c00dddb0>] (sysfs_write_file+0x0/0x80) from [<c009de04>] (vfs_write+0xb8/0x148)
[<c009dd4c>] (vfs_write+0x0/0x148) from [<c009e384>] (sys_write+0x44/0x70)
 r7:00000004 r6:c3bcb070 r5:00000000 r4:00000000
[<c009e340>] (sys_write+0x0/0x70) from [<c0025d00>] (ret_fast_syscall+0x0/0x2c)
 r6:4001b000 r5:00000001 r4:401dc658

Signed-off-by: Krzysztof Helt <krzysztof.h1@wp.pl>
Reported-by: Dmitry Baryshkov <dbaryshkov@gmail.com>
Testted-by: Dmitry Baryshkov <dbaryshkov@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-10-03 18:22:17 -07:00
Marcin Slusarz
2e4a75cdcb rtc: fix kernel panic on second use of SIGIO nofitication
When userspace uses SIGIO notification and forgets to disable it before
closing file descriptor, rtc->async_queue contains stale pointer to struct
file.  When user space enables again SIGIO notification in different
process, kernel dereferences this (poisoned) pointer and crashes.

So disable SIGIO notification on close.

Kernel panic:
(second run of qemu (requires echo 1024 > /sys/class/rtc/rtc0/max_user_freq))

general protection fault: 0000 [1] PREEMPT
CPU 0
Modules linked in: af_packet snd_pcm_oss snd_mixer_oss snd_seq_oss snd_seq_midi_event snd_seq usbhid tuner tea5767 tda8290 tuner_xc2028 xc5000 tda9887 tuner_simple tuner_types mt20xx tea5761 tda9875 uhci_hcd ehci_hcd usbcore bttv snd_via82xx snd_ac97_codec ac97_bus snd_pcm snd_timer ir_common compat_ioctl32 snd_page_alloc videodev v4l1_compat snd_mpu401_uart snd_rawmidi v4l2_common videobuf_dma_sg videobuf_core snd_seq_device snd btcx_risc soundcore tveeprom i2c_viapro
Pid: 5781, comm: qemu-system-x86 Not tainted 2.6.27-rc6 #363
RIP: 0010:[<ffffffff8024f891>]  [<ffffffff8024f891>] __lock_acquire+0x3db/0x73f
RSP: 0000:ffffffff80674cb8  EFLAGS: 00010002
RAX: ffff8800224c62f0 RBX: 0000000000000046 RCX: 0000000000000002
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff8800224c62f0
RBP: ffffffff80674d08 R08: 0000000000000002 R09: 0000000000000001
R10: ffffffff80238941 R11: 0000000000000001 R12: 0000000000000000
R13: 6b6b6b6b6b6b6b6b R14: ffff88003a450080 R15: 0000000000000000
FS:  00007f98b69516f0(0000) GS:ffffffff80623200(0000) knlGS:00000000f7cc86d0
CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
CR2: 0000000000a87000 CR3: 0000000022598000 CR4: 00000000000006e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Process qemu-system-x86 (pid: 5781, threadinfo ffff880028812000, task ffff88003a450080)
Stack:  ffffffff80674cf8 0000000180238440 0000000200000002 0000000000000000
 ffff8800224c62f0 0000000000000046 0000000000000000 0000000000000002
 0000000000000002 0000000000000000 ffffffff80674d68 ffffffff8024fc7a
Call Trace:
 <IRQ>  [<ffffffff8024fc7a>] lock_acquire+0x85/0xa9
 [<ffffffff8029cb62>] ? send_sigio+0x2a/0x184
 [<ffffffff80491d1f>] _read_lock+0x3e/0x4a
 [<ffffffff8029cb62>] ? send_sigio+0x2a/0x184
 [<ffffffff8029cb62>] send_sigio+0x2a/0x184
 [<ffffffff8024fb97>] ? __lock_acquire+0x6e1/0x73f
 [<ffffffff8029cd4d>] ? kill_fasync+0x2c/0x4e
 [<ffffffff8029cd10>] __kill_fasync+0x54/0x65
 [<ffffffff8029cd5b>] kill_fasync+0x3a/0x4e
 [<ffffffff80402896>] rtc_update_irq+0x9c/0xa5
 [<ffffffff80404640>] cmos_interrupt+0xae/0xc0
 [<ffffffff8025d1c1>] handle_IRQ_event+0x25/0x5a
 [<ffffffff8025e5e4>] handle_edge_irq+0xdd/0x123
 [<ffffffff8020da34>] do_IRQ+0xe4/0x144
 [<ffffffff8020bad6>] ret_from_intr+0x0/0xf
 <EOI>  [<ffffffff8026fdc2>] ? __alloc_pages_internal+0xe7/0x3ad
 [<ffffffff8033fe67>] ? clear_page_c+0x7/0x10
 [<ffffffff8026fc10>] ? get_page_from_freelist+0x385/0x450
 [<ffffffff8026fdc2>] ? __alloc_pages_internal+0xe7/0x3ad
 [<ffffffff80280aac>] ? anon_vma_prepare+0x2e/0xf6
 [<ffffffff80279400>] ? handle_mm_fault+0x227/0x6a5
 [<ffffffff80494716>] ? do_page_fault+0x494/0x83f
 [<ffffffff8049251d>] ? error_exit+0x0/0xa9

Code: cc 41 39 45 28 74 24 e8 5e 1d 0f 00 85 c0 0f 84 6a 03 00 00 83 3d 8f a9 aa 00 00 be 47 03 00 00 0f 84 6a 02 00 00 e9 53 03 00 00 <41> ff 85 38 01 00 00 45 8b be 90 06 00 00 41 83 ff 2f 76 24 e8
RIP  [<ffffffff8024f891>] __lock_acquire+0x3db/0x73f
 RSP <ffffffff80674cb8>
---[ end trace 431877d860448760 ]---
Kernel panic - not syncing: Aiee, killing interrupt handler!

Signed-off-by: Marcin Slusarz <marcin.slusarz@gmail.com>
Acked-by: Alessandro Zummo <alessandro.zummo@towertech.it>
Acked-by: David Brownell <dbrownell@users.sourceforge.net>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-10-03 18:22:17 -07:00
Paul Moore
3040a6d5a2 selinux: Fix an uninitialized variable BUG/panic in selinux_secattr_to_sid()
At some point during the 2.6.27 development cycle two new fields were added
to the SELinux context structure, a string pointer and a length field.  The
code in selinux_secattr_to_sid() was not modified and as a result these two
fields were left uninitialized which could result in erratic behavior,
including kernel panics, when NetLabel is used.  This patch fixes the
problem by fully initializing the context in selinux_secattr_to_sid() before
use and reducing the level of direct context manipulation done to help
prevent future problems.

Please apply this to the 2.6.27-rcX release stream.

Signed-off-by: Paul Moore <paul.moore@hp.com>
Signed-off-by: James Morris <jmorris@namei.org>
2008-10-04 08:25:18 +10:00
Linus Torvalds
e105eabb5b Merge branch 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linus
* 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linus:
  [MIPS] SMTC: Fix SMTC dyntick support.
  [MIPS] SMTC: Close tiny holes in the SMTC IPI replay system.
  [MIPS] SMTC: Fix holes in SMTC and FPU affinity support.
  [MIPS] SMTC: Build fix: Fix filename in Makefile
  [MIPS] Build fix: Fix irq flags type
2008-10-03 14:11:43 -07:00
Linus Torvalds
1db9b83738 Merge branch 'for-linus' of git://git390.osdl.marist.edu/pub/scm/linux-2.6
* 'for-linus' of git://git390.osdl.marist.edu/pub/scm/linux-2.6:
  [S390] qdio: prevent stack clobber
  [S390] nohz: Fix __udelay.
2008-10-03 13:43:05 -07:00
H. Peter Anvin
cc65f1ec19 x86 setup: correct segfault in generation of 32-bit reloc kernel
Impact: segfault on build of a 32-bit relocatable kernel

When converting arch/x86/boot/compressed/relocs.c to support unlimited
sections, the computation of sym_strtab in walk_relocs() was done
incorrectly.  This causes a segfault for some people when building the
relocatable 32-bit kernel.

Pointed out by Anonymous <pageexec@freemail.hu>.

Signed-off-by: H. Peter Anvin <hpa@zytor.com>
2008-10-03 13:42:04 -07:00
Linus Torvalds
96d746c68f Fix init/main.c to use regular printk with '%pF' for initcall fn
.. small detail, but the silly e1000e initcall warning debugging caused
me to look at this code.  Rather than gouge my eyes out with a spoon, I
just fixed it.

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-10-03 13:38:07 -07:00
Jan Glauber
75f6276187 [S390] qdio: prevent stack clobber
Don't print more information than fits into the string on the
stack. Combine the informational output of qdio to fit into
one line.

Signed-off-by: Jan Glauber <jang@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2008-10-03 21:55:55 +02:00
Heiko Carstens
d3d238c774 [S390] nohz: Fix __udelay.
This fixes a regression that came with 934b2857cc
("[S390] nohz/sclp: disable timer on synchronous waits.").
If udelay() gets called from a disabled context it sets the clock comparator
to a value where it expects the next interrupt. When the interrupt happens
the clock comparator gets not reset and therefore the interrupt condition
doesn't get cleared. The result is an endless timer interrupt loop.

In addition this patch fixes also the following:

rcutorture reveals that our __udelay implementation is still buggy,
since it might schedule tasklets, but prevents their execution:

NOHZ: local_softirq_pending 42
NOHZ: local_softirq_pending 02
NOHZ: local_softirq_pending 142
NOHZ: local_softirq_pending 02

To fix this we make sure that only the clock comparator interrupt
is enabled when the enabled wait psw is loaded.
Also no code gets called anymore which might schedule tasklets.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2008-10-03 21:55:54 +02:00
Kevin D. Kissell
8531a35e5e [MIPS] SMTC: Fix SMTC dyntick support.
Rework of SMTC support to make it work with the new clock event system,
allowing "tickless" operation, and to make it compatible with the use of
the "wait_irqoff" idle loop.  The new clocking scheme means that the
previously optional IPI instant replay mechanism is now required, and has
been made more robust.

Signed-off-by: Kevin D. Kissell <kevink@paralogos.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2008-10-03 17:58:58 +01:00
Kevin D. Kissell
d2bb01b042 [MIPS] SMTC: Close tiny holes in the SMTC IPI replay system.
Signed-off-by: Kevin D. Kissell <kevink@paralogos.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2008-10-03 17:58:58 +01:00
Kevin D. Kissell
9cc123631b [MIPS] SMTC: Fix holes in SMTC and FPU affinity support.
Signed-off-by: Kevin D. Kissell <kevink@paralogos.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2008-10-03 17:58:58 +01:00
Ralf Baechle
498a863fdf [MIPS] SMTC: Build fix: Fix filename in Makefile
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2008-10-03 17:58:57 +01:00
Ralf Baechle
b7e4226e4f [MIPS] Build fix: Fix irq flags type
Though from a hardware perspective it would be sensible to use only a
32-bit unsigned int type Linux defines interrupt flags to be stored in
an unsigned long and nothing else.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2008-10-03 17:58:56 +01:00
Linus Torvalds
95b866d5af e1000e: Fix incorrect debug warning
Doing 'WARN_ON(preempt_count())' was horribly horribly wrong, and would
cause tons of warnings at bootup if PREEMPT was enabled because the
initcalls currently run with the kernel lock, which increments the
preempt count.

At the same time, the warning was also insufficient, since it didn't
check that interrupts were enabled.

The proper debug function to use for something that can sleep and wants
a warning if it's called in the wrong context is 'might_sleep()'.

Reported-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-10-03 09:18:17 -07:00
Russ Anderson
175e438f7a x86: trivial printk fix in efi.c
[patch] x86: Trivial printk fix in efi.c

The following line is lacking a space between "memdesc" and "doesn't".

  "Kernel-defined memdescdoesn't match the one from EFI!"

Fixed the printk by adding a space.

Signed-off-by: Russ Anderson <rja@sgi.com>
Cc: Russ Anderson <rja@sgi.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-10-03 10:18:30 +02:00
Yinghai Lu
8bb39311bf x86, debug: mtrr_cleanup print out var mtrr before change it
Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-10-03 09:50:04 +02:00
Yinghai Lu
834836ee6a x86: mtrr_cleanup try gran_size to less than 1M, v3
J.A. Magallón reported:

 >> Also, on a 64 bit box with 4Gb, it gives this:
 >>
 >> cicely:~# cat /proc/mtrr
 >> reg00: base=0x00000000 (   0MB), size=4096MB: write-back, count=1
 >> reg01: base=0x100000000 (4096MB), size=1024MB: write-back, count=1
 >> reg02: base=0x140000000 (5120MB), size= 512MB: write-back, count=1
 >> reg03: base=0x160000000 (5632MB), size= 256MB: write-back, count=1
 >> reg04: base=0x80000000 (2048MB), size=2048MB: uncachable, count=1

boundary handling has a problem ... fix it.

Reported-by: J.A. Magallón <jamagallon@ono.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-10-03 09:41:55 +02:00
J.A. Magallón
136c82c6f7 x86: mtrr_cleanup try gran_size to less than 1M, cleanup
Patch below cleans up formatting, with space for big bases and sizes (64 Gb).

Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-10-03 09:41:42 +02:00
Linus Torvalds
b5ff7df3df Check mapped ranges on sysfs resource files
This is loosely based on a patch by Jesse Barnes to check the user-space
PCI mappings though the sysfs interfaces.  Quoting Jesse's original
explanation:

  It's fairly common for applications to map PCI resources through sysfs.
  However, with the current implementation, it's possible for an application
  to map far more than the range corresponding to the resourceN file it
  opened.  This patch plugs that hole by checking the range at mmap time,
  similar to what is done on platforms like sparc64 in their lower level
  PCI remapping routines.

  It was initially put together to help debug the e1000e NVRAM corruption
  problem, since we initially thought an X driver might be walking past the
  end of one of its mappings and clobbering the NVRAM.  It now looks like
  that's not the case, but doing the check is still important for obvious
  reasons.

and this version of the patch differs in that it uses a helper function
to clarify the code, and does all the checks in pages (instead of bytes)
in order to avoid overflows when doing "<< PAGE_SHIFT" etc.

Acked-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-10-02 18:52:51 -07:00
Jesse Brandeburg
6f92a6a7dd e1000e: update version from k4 to k6
Signed-off-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-10-02 18:28:13 -07:00
Thomas Gleixner
717d438d1f e1000e: debug contention on NVM SWFLAG
This patch adds a mutex to the e1000e driver that would help
catch any collisions of two e1000e threads accessing hardware
at the same time.

description and patch updated by Jesse

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-10-02 18:28:13 -07:00
Jesse Brandeburg
4fa7553a07 e1000e: drop stats lock
the stats lock is left over from e1000, e1000e no longer
has the adjust tbi stats function that required the addition
of the stats lock to begin with.

adding a mutex to acquire_swflag helped catch this one too.

Signed-off-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-10-02 18:28:12 -07:00
Jesse Brandeburg
23033fad5b e1000e: remove phy read from inside spinlock
thanks to tglx, we're finding some interesting reentrancy issues.
this patch removes the phy read from inside a spinlock, paving
the way for removing the spinlock completely.  The phy read was
only feeding a statistic that wasn't used.

Signed-off-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-10-02 18:28:12 -07:00
Jesse Brandeburg
a8f88ff5a5 e1000e: do not ever sleep in interrupt context
e1000e was apparently calling two functions that attempted to reserve
the SWFLAG bit for exclusive (to hardware and firmware) access to
the PHY and NVM (aka eeprom).  These accesses could possibly call
msleep to wait for the resource which is not allowed from interrupt
context.

Signed-off-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-10-02 18:28:12 -07:00
Jesse Brandeburg
37f40239f4 e1000e: reset swflag after resetting hardware
in the process of debugging things, noticed that the swflag is not reset
by the driver after reset, and the swflag is probably not reset unless
management firmware clears it after 100ms.

Signed-off-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-10-02 18:28:12 -07:00
Andy Whitcroft
6babc32c41 mm: handle initialising compound pages at orders greater than MAX_ORDER
When we initialise a compound page we initialise the page flags and head
page pointer for all base pages spanned by that page.  When we initialise
a gigantic page (a page of order greater than or equal to MAX_ORDER) we
have to initialise more than MAX_ORDER_NR_PAGES pages.  Currently we
assume that all elements of the mem_map in this page are contigious in
memory.  However this is only guarenteed out to MAX_ORDER_NR_PAGES pages,
and with SPARSEMEM enabled they will not be contigious.  This leads us to
walk off the end of the first section and scribble on everything which
follows, BAD.

When we reach a MAX_ORDER_NR_PAGES boundary we much locate the next
section of the mem_map.  As gigantic pages can only be maximally aligned
we know this will occur at exact multiple of MAX_ORDER_NR_PAGES pages from
the start of the page.

This is a bug fix for the gigantic page support in hugetlbfs.

Credit to Mel Gorman for spotting the issue.

Signed-off-by: Andy Whitcroft <apw@shadowen.org>
Cc: Mel Gorman <mel@csn.ul.ie>
Cc: Jon Tollefson <kniht@linux.vnet.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-10-02 15:53:13 -07:00
Nick Piggin
4b19de6d1c mm: tiny-shmem nommu fix
The previous patch db203d53d4 ("mm:
tiny-shmem fix lock ordering: mmap_sem vs i_mutex") to fix the lock
ordering in tiny-shmem breaks shared anonymous and IPC memory on NOMMU
architectures because it was using the expanding truncate to signal ramfs
to allocate a physically contiguous RAM backing the inode (otherwise it is
unusable for "memory mapping" it to userspace).

However do_truncate is what caused the lock ordering error, due to it
taking i_mutex.  In this case, we can actually just call ramfs directly to
allocate memory for the mapping, rather than go via truncate.

Acked-by: David Howells <dhowells@redhat.com>
Acked-by: Hugh Dickins <hugh@veritas.com>
Signed-off-by: Nick Piggin <npiggin@suse.de>
Cc: Matt Mackall <mpm@selenic.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-10-02 15:53:13 -07:00
Gerald Schaefer
6c1b7f680d memory hotplug: missing zone->lock in test_pages_isolated()
__test_page_isolated_in_pageblock() in mm/page_isolation.c has a comment
saying that the caller must hold zone->lock. But the only caller of that
function, test_pages_isolated(), does not hold zone->lock and the lock is
also not acquired anywhere before. This patch adds the missing zone->lock
to test_pages_isolated().

We reproducibly run into BUG_ON(!PageBuddy(page)) in __offline_isolated_pages()
during memory hotplug stress test, see trace below. This patch fixes that
problem, it would be good if we could have it in 2.6.27.

kernel BUG at /home/autobuild/BUILD/linux-2.6.26-20080909/mm/page_alloc.c:4561!
illegal operation: 0001 [#1] PREEMPT SMP
Modules linked in: dm_multipath sunrpc bonding qeth_l3 dm_mod qeth ccwgroup vmur
CPU: 1 Not tainted 2.6.26-29.x.20080909-s390default #1
Process memory_loop_all (pid: 10025, task: 2f444028, ksp: 2b10dd28)
Krnl PSW : 040c0000 801727ea (__offline_isolated_pages+0x18e/0x1c4)
 R:0 T:1 IO:0 EX:0 Key:0 M:1 W:0 P:0 AS:0 CC:0 PM:0
Krnl GPRS: 00000000 7e27fc00 00000000 7e27fc00
 00000000 00000400 00014000 7e27fc01
 00606f00 7e27fc00 00013fe0 2b10dd28
 00000005 80172662 801727b2 2b10dd28
Krnl Code: 801727de: 5810900c l %r1,12(%r9)
 801727e2: a7f4ffb3 brc 15,80172748
 801727e6: a7f40001 brc 15,801727e8
 >801727ea: a7f4ffbc brc 15,80172762
 801727ee: a7f40001 brc 15,801727f0
 801727f2: a7f4ffaf brc 15,80172750
 801727f6: 0707 bcr 0,%r7
 801727f8: 0017 unknown
Call Trace:
([<0000000000172772>] __offline_isolated_pages+0x116/0x1c4)
 [<00000000001953a2>] offline_isolated_pages_cb+0x22/0x34
 [<000000000013164c>] walk_memory_resource+0xcc/0x11c
 [<000000000019520e>] offline_pages+0x36a/0x498
 [<00000000001004d6>] remove_memory+0x36/0x44
 [<000000000028fb06>] memory_block_change_state+0x112/0x150
 [<000000000028ffb8>] store_mem_state+0x90/0xe4
 [<0000000000289c00>] sysdev_store+0x34/0x40
 [<00000000001ee048>] sysfs_write_file+0xd0/0x178
 [<000000000019b1a8>] vfs_write+0x74/0x118
 [<000000000019b9ae>] sys_write+0x46/0x7c
 [<000000000011160e>] sysc_do_restart+0x12/0x16
 [<0000000077f3e8ca>] 0x77f3e8ca

Signed-off-by: Gerald Schaefer <gerald.schaefer@de.ibm.com>
Acked-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-10-02 15:53:13 -07:00
Dan Carpenter
aa94fbd5cc fix error-path NULL deref in alloc_posix_timer()
Found by static checker (http://repo.or.cz/w/smatch.git).

Signed-off-by: Dan Carpenter <error27@gmail.com>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-10-02 15:53:13 -07:00
Pascal Terjan
c0c9209ddd braille_console: only register notifiers when the braille console is used
Only register the braille driver VT and keyboard notifiers when the
braille console is used.  Avoids eating insert or backspace keys.

Addresses http://bugzilla.kernel.org/show_bug.cgi?id=11242

Signed-off-by: Pascal Terjan <pterjan@mandriva.com>
Signed-off-by: Samuel Thibault <samuel.thibault@ens-lyon.org>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-10-02 15:53:13 -07:00
Nick Piggin
16dbc6c961 inotify: fix lock ordering wrt do_page_fault's mmap_sem
Fix inotify lock order reversal with mmap_sem due to holding locks over
copy_to_user.

Signed-off-by: Nick Piggin <npiggin@suse.de>
Reported-by: "Daniel J Blueman" <daniel.blueman@gmail.com>
Tested-by: "Daniel J Blueman" <daniel.blueman@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-10-02 15:53:13 -07:00
David Winn
08650869e0 fbcon: fix monochrome color value calculation
Commit 22af89aa0c ("fbcon: replace mono_col
macro with static inline") changed the order of operations for computing
monochrome color values.  This generates 0xffff000f instead of 0x0000000f
for a 4 bit monochrome color, leading to image corruption if it is passed
to cfb_imageblit or other similar functions.  Fix it up.

Cc: Harvey Harrison <harvey.harrison@gmail.com>
Cc: "Antonino A. Daplas" <adaplas@pol.net>
Cc: Krzysztof Helt <krzysztof.h1@poczta.fm>
Cc: <stable@kernel.org>		[2.6.26.x]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-10-02 15:53:13 -07:00
Linus Torvalds
550ac95879 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound-2.6
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound-2.6:
  ALSA: snd-powermac: HP detection for 1st iMac G3 SL
  ALSA: snd-powermac: mixers for PowerMac G4 AGP
  ASoC: Set correct name for WM8753 rec mixer output
2008-10-02 07:54:32 -07:00
Takashi Iwai
591d8a25c7 Merge branch 'asoc-fixes' into for-linus 2008-10-02 12:50:50 +02:00
Risto Suominen
030b655b06 ALSA: snd-powermac: HP detection for 1st iMac G3 SL
Correct headphone detection for 1st generation iMac G3 Slot-loading (Screamer).

This patch fixes the regression in the recent snd-powermac which
doesn't support some G3/G4 PowerMacs:
    http://lkml.org/lkml/2008/10/1/220

Signed-off-by: Risto Suominen <Risto.Suominen@gmail.com>
Tested-by: Mariusz Kozlowski <m.kozlowski@tuxland.pl>
Cc: stable@kernel.org
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2008-10-02 12:50:37 +02:00
Risto Suominen
4dbf95ba6c ALSA: snd-powermac: mixers for PowerMac G4 AGP
Add mixer controls for PowerMac G4 AGP (Screamer).

This patch fixes the regression in the recent snd-powermac which
doesn't support some G3/G4 PowerMacs:
    http://lkml.org/lkml/2008/10/1/220

Signed-off-by: Risto Suominen <Risto.Suominen@gmail.com>
Tested-by: Mariusz Kozlowski <m.kozlowski@tuxland.pl>
Cc: stable@kernel.org
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2008-10-02 12:50:04 +02:00
Rob Sims
4037314afc ASoC: Set correct name for WM8753 rec mixer output
Rob Sims wrote:

"I can't seem to turn on register 0x17, bit 3 in the sound chip, except
by codec_reg_write; the mixer lacks direct or indirect control.  It
seems there are two names for the output of the rec mixer:
Capture ST Mixer
Playback Mixer

Would the following do the trick?"

I confirm that this solves the audio problems I was having.

Signed-off-by: Jonas Bonn <jonas.bonn@gmail.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2008-10-02 12:27:43 +02:00
Kumar Gala
1fce2d01df powerpc: Fix boot hang regression on MPC8544DS
Commit 00c5372d37 caused the MPC8544DS
board to hang at boot.  The MPC8544DS is unique in that it doesn't use
the PCI slots on the ULI (unlike the MPC8572DS or MPC8610HPCD).  So
the dummy read at the end of the address space causes us to hang.

We can detect the situation by comparing the bridge's BARs versus
the root complex.

Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
2008-10-02 00:58:49 -05:00
Bruce Allan
4a77035828 e1000e: write protect ICHx NVM to prevent malicious write/erase
Set the hardware to ignore all write/erase cycles to the GbE region in
the ICHx NVM.  This feature can be disabled by the WriteProtectNVM module
parameter (enabled by default) only after a hardware reset, but
the machine must be power cycled before trying to enable writes.

Signed-off-by: Bruce Allan <bruce.w.allan@intel.com>
Signed-off-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
CC: arjan@linux.intel.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-10-01 17:31:25 -07:00
Mike Rapoport
20b918dc77 pxa2xx_spi: fix build breakage
This patch fixes a build error in the pxa2xx-spi driver,
introduced by commit 7e96445533
("pxa2xx_spi: dma bugfixes")

  CC      drivers/spi/pxa2xx_spi.o
drivers/spi/pxa2xx_spi.c: In function 'map_dma_buffers':
drivers/spi/pxa2xx_spi.c:331: error: invalid operands to binary &
drivers/spi/pxa2xx_spi.c:331: error: invalid operands to binary &
drivers/spi/pxa2xx_spi.c: In function 'pump_transfers':
drivers/spi/pxa2xx_spi.c:897: warning: format '%lu' expects type 'long unsigned int', but argument 4 has type 'unsigned int'

[dbrownell@users.sourceforge.net: fix warning too ]

Signed-off-by: Mike Rapoport <mike@compulab.co.il>
Acked-by: Eric Miao <eric.miao@marvell.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-10-01 12:31:12 -07:00
Linus Torvalds
edfd222fc5 Merge branch 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  x86, vmi: fix broken LDT access
  x86: fix typo in enable_mtrr_cleanup early parameter
2008-10-01 12:26:49 -07:00
David Howells
d6478fad43 MN10300: Fix IRQ handling
Fix the IRQ handling on the MN10300 arch.

This patch makes a number of significant changes:

 (1) It separates the irq_chip definition for edge-triggered interrupts from
     the one for level-triggered interrupts.

     This is necessary because the MN10300 PIC latches the IRQ channel's
     interrupt request bit (GxICR_REQUEST), even after the device has ceased to
     assert its interrupt line and the interrupt channel has been disabled in
     the PIC.  So for level-triggered interrupts we need to clear this bit when
     we re-enable - which is achieved by setting GxICR_DETECT but not
     GxICR_REQUEST when writing to the register.

     Not doing this results in spurious interrupts occurring because calling
     mask_ack() at the start of handle_level_irq() is insufficient - it fails
     to clear the REQUEST latch because the device that caused the interrupt is
     still asserting its interrupt line at this point.

 (2) IRQ disablement [irq_chip::disable_irq()] shouldn't clear the interrupt
     request flag for edge-triggered interrupts lest it lose an interrupt.

 (3) IRQ unmasking [irq_chip::unmask_irq()] also shouldn't clear the interrupt
     request flag for edge-triggered interrupts lest it lose an interrupt.

 (4) The end() operation is now left to the default (no-operation) as
     __do_IRQ() is compiled out.  This may affect misrouted_irq(), but
     according to Thomas Gleixner it's the correct thing to do.

 (5) handle_level_irq() is used for edge-triggered interrupts rather than
     handle_edge_irq() as the MN10300 PIC latches interrupt events even on
     masked IRQ channels, thus rendering IRQ_PENDING unnecessary.  It is
     sufficient to call mask_ack() at the start and unmask() at the end.

 (6) For level-triggered interrupts, ack() is now NULL as it's not used, and
     there is no effective ACK function on the PIC.  mask_ack() is now the
     same as mask() as the latch continues to latch, even when the channel is
     masked.

Further, the patch discards the disable() op implementation as its now the same
as the mask() op implementation, which is used instead.

It also discards the enable() op implementations as they're now the same as
the unmask() op implementations, which are used instead.

Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-10-01 09:40:43 -07:00
Linus Torvalds
7ac9c1c24c Merge git://git.kernel.org/pub/scm/linux/kernel/git/agk/linux-2.6-dm
* git://git.kernel.org/pub/scm/linux/kernel/git/agk/linux-2.6-dm:
  dm mpath: add missing path switching locking
  dm: cope with access beyond end of device in dm_merge_bvec
  dm: always allow one page in dm_merge_bvec
2008-10-01 09:37:23 -07:00
Linus Torvalds
ae1cfb1174 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6:
  af_key: Free dumping state on socket close
  XFRM,IPv6: initialize ip6_dst_blackhole_ops.kmem_cachep
  ipv6: NULL pointer dereferrence in tcp_v6_send_ack
  tcp: Fix NULL dereference in tcp_4_send_ack()
  sctp: Fix kernel panic while process protocol violation parameter
  iucv: Fix mismerge again.
  ipsec: Fix pskb_expand_head corruption in xfrm_state_check_space
2008-10-01 09:37:04 -07:00
Chandra Seetharaman
7253a33434 dm mpath: add missing path switching locking
Moving the path activation to workqueue along with scsi_dh patches introduced
a race. It is due to the fact that the current_pgpath (in the multipath data
structure) can be modified if changes happen in any of the paths leading to
the lun. If the changes lead to current_pgpath being set to NULL, then it
leads to the invalid access which results in the panic below.

This patch fixes that by storing the pgpath to activate in the multipath data
structure and properly protecting it.

Note that if activate_path is called twice in succession with different pgpath,
with the second one being called before the first one is done, then activate
path will be called twice for the second pgpath, which is fine.

Unable to handle kernel paging request for data at address 0x00000020
Faulting instruction address: 0xd000000000aa1844
cpu 0x1: Vector: 300 (Data Access) at [c00000006b987a80]
    pc: d000000000aa1844: .activate_path+0x30/0x218 [dm_multipath]
    lr: c000000000087a2c: .run_workqueue+0x114/0x204
    sp: c00000006b987d00
   msr: 8000000000009032
   dar: 20
 dsisr: 40000000
  current = 0xc0000000676bb3f0
  paca    = 0xc0000000006f3680
    pid   = 2528, comm = kmpath_handlerd
enter ? for help
[c00000006b987da0] c000000000087a2c .run_workqueue+0x114/0x204
[c00000006b987e40] c000000000088b58 .worker_thread+0x120/0x144
[c00000006b987f00] c00000000008ca70 .kthread+0x78/0xc4
[c00000006b987f90] c000000000027cc8 .kernel_thread+0x4c/0x68

Signed-off-by: Chandra Seetharaman <sekharan@us.ibm.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
2008-10-01 14:39:27 +01:00