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spinlock: bug fix in spinlock code

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Using ebx will truncate the high 32bit part of 64bit virtual address.
So using rbx instead of ebx.

Signed-off-by: Zheng, Gen <gen.zheng@intel.com>
Reviewed-by: Yakui, Zhao <yakui.zhao@intel.com>
This commit is contained in:
Zheng, Gen 2018-04-12 13:57:05 +08:00 committed by lijinxia
parent 81b26dacc4
commit 1eb3854555
1 changed files with 6 additions and 6 deletions
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12
include/lib/spinlock.h
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@ -69,13 +69,13 @@ static inline int spinlock_release(spinlock_t *lock)
.macro spinlock_obtain lock
movl $1, % eax
lea \lock, % ebx
lock xaddl % eax, SYNC_SPINLOCK_HEAD_OFFSET(%ebx)
cmpl % eax, SYNC_SPINLOCK_TAIL_OFFSET(%ebx)
lea \lock, % rbx
lock xaddl % eax, SYNC_SPINLOCK_HEAD_OFFSET(%rbx)
cmpl % eax, SYNC_SPINLOCK_TAIL_OFFSET(%rbx)
jz 1f
2 :
pause
cmpl % eax, SYNC_SPINLOCK_TAIL_OFFSET(%ebx)
cmpl % eax, SYNC_SPINLOCK_TAIL_OFFSET(%rbx)
jnz 2b
1 :
.endm
@ -83,8 +83,8 @@ static inline int spinlock_release(spinlock_t *lock)
#define spinlock_obtain(x) spinlock_obtain lock = (x)
.macro spinlock_release lock
lea \lock, % ebx
lock incl SYNC_SPINLOCK_TAIL_OFFSET(%ebx)
lea \lock, % rbx
lock incl SYNC_SPINLOCK_TAIL_OFFSET(%rbx)
.endm
#define spinlock_release(x) spinlock_release lock = (x)