x86: replace LOCK_PREFIX in futex.h
authorThomas Gleixner <tglx@linutronix.de>
Fri, 1 Feb 2008 16:45:14 +0000 (17:45 +0100)
committerIngo Molnar <mingo@elte.hu>
Fri, 1 Feb 2008 16:45:14 +0000 (17:45 +0100)
commit9d55b9923a1b7ea8193b8875c57ec940dc2ff027
treec80e51cc63c1e2316d4419b8644ff8359b8586f6
parent5df7fa1c62146a0933767d040d400013310dbcc7
x86: replace LOCK_PREFIX in futex.h

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>
include/asm-x86/futex.h