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| author | Andrew Morton <akpm@linux-foundation.org> | 2007-11-14 17:00:41 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-11-14 18:45:44 -0800 |
| commit | 35d5d08a085c56f153458c3f5d8ce24123617faf (patch) | |
| tree | 2db6e598e87809bc1ce7838861b2cff18e5fe60d /drivers/char/vme_scc.c | |
| parent | 7eea436433b7b18045f272562e256976f593f7c0 (diff) | |
| download | blackbird-op-linux-35d5d08a085c56f153458c3f5d8ce24123617faf.tar.gz blackbird-op-linux-35d5d08a085c56f153458c3f5d8ce24123617faf.zip | |
x86: disable preemption in delay_tsc()
Marin Mitov points out that delay_tsc() can misbehave if it is preempted and
rescheduled on a different CPU which has a skewed TSC. Fix it by disabling
preemption.
(I assume that the worst-case behaviour here is a stall of 2^32 cycles)
Cc: Andi Kleen <ak@suse.de>
Cc: Marin Mitov <mitov@issp.bas.bg>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/char/vme_scc.c')
0 files changed, 0 insertions, 0 deletions
