Commit a33fff3a authored by Thomas Gleixner's avatar Thomas Gleixner Committed by Ingo Molnar

x86: fix asm constraints in spinlock_32/64.h

Use the correct constraints for the spinlock assembler functions.

read (modify) write functions need "+m" instead of "=m"
Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
parent 2fed0c50
......@@ -99,7 +99,7 @@ static inline int __raw_spin_trylock(raw_spinlock_t *lock)
static inline void __raw_spin_unlock(raw_spinlock_t *lock)
{
asm volatile("movb $1,%0" : "+m" (lock->slock) :: "memory");
asm volatile("movb $1,%0" : "=m" (lock->slock) :: "memory");
}
#else
......
......@@ -34,7 +34,7 @@ static inline void __raw_spin_lock(raw_spinlock_t *lock)
"jle 3b\n\t"
"jmp 1b\n"
"2:\t"
: "=m" (lock->slock) : : "memory");
: "+m" (lock->slock) : : "memory");
}
/*
......@@ -80,7 +80,7 @@ static inline int __raw_spin_trylock(raw_spinlock_t *lock)
asm volatile(
"xchgl %0,%1"
:"=q" (oldval), "=m" (lock->slock)
:"=q" (oldval), "+m" (lock->slock)
:"0" (0) : "memory");
return oldval > 0;
......@@ -162,13 +162,13 @@ static inline int __raw_write_trylock(raw_rwlock_t *lock)
static inline void __raw_read_unlock(raw_rwlock_t *rw)
{
asm volatile(LOCK_PREFIX "incl %0" :"=m" (rw->lock) : : "memory");
asm volatile(LOCK_PREFIX "incl %0" :"+m" (rw->lock) : : "memory");
}
static inline void __raw_write_unlock(raw_rwlock_t *rw)
{
asm volatile(LOCK_PREFIX "addl $" RW_LOCK_BIAS_STR ",%0"
: "=m" (rw->lock) : : "memory");
asm volatile(LOCK_PREFIX "addl $" RW_LOCK_BIAS_STR ", %0"
: "+m" (rw->lock) : : "memory");
}
#define _raw_spin_relax(lock) cpu_relax()
......
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