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x86: ticket spin locks: fix asm constraints

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In addition to these changes I doubt the 'volatile' on all the ticket
lock asm()-s are really necessary.

Signed-off-by: Jan Beulich <jbeulich@novell.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Jan Beulich 2008-09-05 13:26:39 +01:00 committed by Ingo Molnar
parent 0a328ea43d
commit ef1f341328
1 changed files with 3 additions and 3 deletions
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6
include/asm-x86/spinlock.h
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@ -101,7 +101,7 @@ static __always_inline int __ticket_spin_trylock(raw_spinlock_t *lock)
"1:"
"sete %b1\n\t"
"movzbl %b1,%0\n\t"
: "=&a" (tmp), "=Q" (new), "+m" (lock->slock)
: "=&a" (tmp), "=&Q" (new), "+m" (lock->slock)
:
: "memory", "cc");
@ -146,7 +146,7 @@ static __always_inline void __ticket_spin_lock(raw_spinlock_t *lock)
/* don't need lfence here, because loads are in-order */
"jmp 1b\n"
"2:"
: "+Q" (inc), "+m" (lock->slock), "=r" (tmp)
: "+r" (inc), "+m" (lock->slock), "=&r" (tmp)
:
: "memory", "cc");
}
@ -166,7 +166,7 @@ static __always_inline int __ticket_spin_trylock(raw_spinlock_t *lock)
"1:"
"sete %b1\n\t"
"movzbl %b1,%0\n\t"
: "=&a" (tmp), "=r" (new), "+m" (lock->slock)
: "=&a" (tmp), "=&q" (new), "+m" (lock->slock)
:
: "memory", "cc");