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mirror of https://github.com/edk2-porting/linux-next.git synced 2024-12-25 21:54:06 +08:00
linux-next/include
Oleg Nesterov f63ee72e0f [PATCH] introduce lock_task_sighand() helper
Add lock_task_sighand() helper and converts group_send_sig_info() to use
it.  Hopefully we will have more users soon.

This patch also removes '!sighand->count' and '!p->usage' checks, I think
they both are bogus, racy and unneeded (but probably it makes sense to
restore them as BUG_ON()s).

->sighand is cleared and it's ->count is decremented in release_task() with
sighand->siglock held, so it is a bug to have '!p->usage || !->count' after
we already locked and verified it is the same.  On the other hand, an
already dead task without ->sighand can have a non-zero ->usage due to
ptrace, for example.

If we read the stale value of ->sighand we must see the change after
spin_lock(), because that change was done while holding that same old
->sighand.siglock.

Signed-off-by: Oleg Nesterov <oleg@tv-sign.ru>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-03-28 18:36:42 -08:00
..
acpi [PATCH] s/;;/;/g 2006-03-24 07:33:24 -08:00
asm-alpha [PATCH] alpha: make poll flags the same as other architectures 2006-03-28 09:16:02 -08:00
asm-arm Merge master.kernel.org:/home/rmk/linux-2.6-arm 2006-03-28 13:53:03 -08:00
asm-arm26 [PATCH] unify pfn_to_page: arm26 pfn_to_page 2006-03-27 08:44:44 -08:00
asm-cris [PATCH] unify pfn_to_page: cris pfn_to_page 2006-03-27 08:44:45 -08:00
asm-frv [PATCH] lightweight robust futexes updates 2006-03-27 08:44:49 -08:00
asm-generic [PATCH] for_each_possible_cpu: fixes for generic part 2006-03-28 09:16:05 -08:00
asm-h8300 [PATCH] unify pfn_to_page: h8300 pfn_to_page 2006-03-27 08:44:45 -08:00
asm-i386 [PATCH] arch/i386/kernel/microcode.c: remove the obsolete microcode_ioctl 2006-03-28 09:16:06 -08:00
asm-ia64 [PATCH] Notifier chain update: API changes 2006-03-27 08:44:50 -08:00
asm-m32r [PATCH] unify PFN_* macros 2006-03-27 08:44:48 -08:00
asm-m68k [PATCH] m68k: fix undefined reference to generic_find_next_zero_le_bit 2006-03-26 08:57:13 -08:00
asm-m68knommu [PATCH] bitops: m68knommu: use generic bitops 2006-03-26 08:57:13 -08:00
asm-mips Merge master.kernel.org:/home/rmk/linux-2.6-serial 2006-03-28 13:52:37 -08:00
asm-parisc [PATCH] Typo fixes 2006-03-28 09:16:08 -08:00
asm-powerpc [PATCH] Notifier chain update: API changes 2006-03-27 08:44:50 -08:00
asm-ppc [PATCH] unify pfn_to_page: ppc pfn_to_page 2006-03-27 08:44:46 -08:00
asm-s390 [PATCH] s390: add ptr_to_compat() 2006-03-27 08:44:48 -08:00
asm-sh [PATCH] Typo fixes 2006-03-28 09:16:08 -08:00
asm-sh64 [PATCH] unify PFN_* macros 2006-03-27 08:44:48 -08:00
asm-sparc [PATCH] unify pfn_to_page: sparc pfn_to_page 2006-03-27 08:44:46 -08:00
asm-sparc64 Merge master.kernel.org:/pub/scm/linux/kernel/git/davem/sparc-2.6 2006-03-28 09:25:22 -08:00
asm-um [PATCH] unify pfn_to_page: uml pfn_to_page 2006-03-27 08:44:46 -08:00
asm-v850 [PATCH] unify pfn_to_page: v850 pfn_to_page 2006-03-27 08:44:47 -08:00
asm-x86_64 [PATCH] arch/i386/kernel/microcode.c: remove the obsolete microcode_ioctl 2006-03-28 09:16:06 -08:00
asm-xtensa [PATCH] unify pfn_to_page: xtensa pfn_to_page 2006-03-27 08:44:47 -08:00
keys
linux [PATCH] introduce lock_task_sighand() helper 2006-03-28 18:36:42 -08:00
math-emu
media V4L/DVB (3599): Implement new routing commands for wm8775 and cs53l32a. 2006-03-24 16:27:00 -03:00
mtd
net Merge master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 2006-03-27 08:47:29 -08:00
pcmcia [PATCH] pcmcia: Add macro to match PCMCIA cards by numeric ID and first vendor string 2006-03-01 11:11:26 +01:00
rdma IB/umad: Add support for large RMPP transfers 2006-03-20 10:08:23 -08:00
rxrpc
scsi [PATCH] Make libata not powerdown drivers on PM_EVENT_FREEZE. 2006-03-24 09:51:36 -05:00
sound [PATCH] mark f_ops const in the inode 2006-03-28 09:16:05 -08:00
video [PATCH] Remove MODULE_PARM 2006-03-25 08:22:52 -08:00