x86: replace LOCK_PREFIX in futex.h

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The exception fixup for the futex macros __futex_atomic_op1/2 and
futex_atomic_cmpxchg_inatomic() is missing an entry when the lock
prefix is replaced by a NOP via SMP alternatives.

Chuck Ebert tracked this down from the information provided in:
https://bugzilla.redhat.com/show_bug.cgi?id=429412

A possible solution would be to add another fixup after the
LOCK_PREFIX, so both the LOCK and NOP case have their own entry in the
exception table, but it's not really worth the trouble.

Simply replace LOCK_PREFIX with lock and keep those untouched by SMP
alternatives.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

Signed-off-by: Ingo Molnar <mingo@elte.hu>

...

This commit is contained in:

Thomas Gleixner 2008-02-01 17:45:14 +01:00 • committed by Ingo Molnar

parent 5df7fa1c62

commit 9d55b9923a

1 changed files with 3 additions and 3 deletions

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include/asm-x86/futex.h

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