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| author | Ingo Molnar <mingo@elte.hu> | 2006-07-29 05:17:57 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-07-28 21:02:00 -0700 |
| commit | e3f2ddeac718c768fdac4b7fe69d465172f788a8 (patch) | |
| tree | 5428532dc6c87710c35a71858425f6d726f0e44c /include/linux/kernel_stat.h | |
| parent | 627371d73cdd04ed23fe098755b4f855138ad9e0 (diff) | |
| download | blackbird-op-linux-e3f2ddeac718c768fdac4b7fe69d465172f788a8.tar.gz blackbird-op-linux-e3f2ddeac718c768fdac4b7fe69d465172f788a8.zip | |
[PATCH] pi-futex: robust-futex exit
Fix robust PI-futexes to be properly unlocked on unexpected exit.
For this to work the kernel has to know whether a futex is a PI or a
non-PI one, because the semantics are different. Since the space in
relevant glibc data structures is extremely scarce, the best solution is
to encode the 'PI' information in bit 0 of the robust list pointer.
Existing (non-PI) glibc robust futexes have this bit always zero, so the
ABI is kept. New glibc with PI-robust-futexes will set this bit.
Further fixes from Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Ulrich Drepper <drepper@redhat.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'include/linux/kernel_stat.h')
0 files changed, 0 insertions, 0 deletions
