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authorIngo Molnar <mingo@elte.hu>2006-07-29 05:17:57 +0200
committerLinus Torvalds <torvalds@g5.osdl.org>2006-07-28 21:02:00 -0700
commite3f2ddeac718c768fdac4b7fe69d465172f788a8 (patch)
tree5428532dc6c87710c35a71858425f6d726f0e44c /block/ll_rw_blk.c
parent627371d73cdd04ed23fe098755b4f855138ad9e0 (diff)
[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 'block/ll_rw_blk.c')
0 files changed, 0 insertions, 0 deletions