x86: fix asm constraints in spinlock_32/64.h (a33fff3a) · Commits · 戴 / test

include/asm-x86/spinlock_32.h

+1 −1

Original line number	Diff line number	Diff line
		@@ -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

+5 −5

Original line number	Diff line number	Diff line
		@@ -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");
		: "+m" (rw->lock) : : "memory");
		}

		#define _raw_spin_relax(lock) cpu_relax()