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Diffstat (limited to 'arch/x86/include/asm/qspinlock.h')
-rw-r--r--arch/x86/include/asm/qspinlock.h13
1 files changed, 8 insertions, 5 deletions
diff --git a/arch/x86/include/asm/qspinlock.h b/arch/x86/include/asm/qspinlock.h
index 87623c6b13db..bd5ac6cc37db 100644
--- a/arch/x86/include/asm/qspinlock.h
+++ b/arch/x86/include/asm/qspinlock.h
@@ -13,12 +13,15 @@
13#define queued_fetch_set_pending_acquire queued_fetch_set_pending_acquire 13#define queued_fetch_set_pending_acquire queued_fetch_set_pending_acquire
14static __always_inline u32 queued_fetch_set_pending_acquire(struct qspinlock *lock) 14static __always_inline u32 queued_fetch_set_pending_acquire(struct qspinlock *lock)
15{ 15{
16 u32 val = 0; 16 u32 val;
17
18 if (GEN_BINARY_RMWcc(LOCK_PREFIX "btsl", lock->val.counter, c,
19 "I", _Q_PENDING_OFFSET))
20 val |= _Q_PENDING_VAL;
21 17
18 /*
19 * We can't use GEN_BINARY_RMWcc() inside an if() stmt because asm goto
20 * and CONFIG_PROFILE_ALL_BRANCHES=y results in a label inside a
21 * statement expression, which GCC doesn't like.
22 */
23 val = GEN_BINARY_RMWcc(LOCK_PREFIX "btsl", lock->val.counter, c,
24 "I", _Q_PENDING_OFFSET) * _Q_PENDING_VAL;
22 val |= atomic_read(&lock->val) & ~_Q_PENDING_MASK; 25 val |= atomic_read(&lock->val) & ~_Q_PENDING_MASK;
23 26
24 return val; 27 return val;