[PATCH 14/15] x86/ticketlocks: use cmpxchg_flag for trylock

[Jeremy Fitzhardinge]

From: Jeremy Fitzhardinge <jeremy.fitzhardinge@xxxxxxxxxx>

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@xxxxxxxxxx>
---
 arch/x86/include/asm/spinlock.h |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/arch/x86/include/asm/spinlock.h b/arch/x86/include/asm/spinlock.h
index 05fd59e..e208c8f 100644
--- a/arch/x86/include/asm/spinlock.h
+++ b/arch/x86/include/asm/spinlock.h
@@ -102,7 +102,7 @@ static __always_inline int __ticket_spin_trylock(arch_spinlock_t *lock)
 	new.head_tail = old.head_tail + (1 << TICKET_SHIFT);
 
 	/* cmpxchg is a full barrier, so nothing can move before it */
-	return cmpxchg(&lock->head_tail, old.head_tail, new.head_tail) == old.head_tail;
+	return cmpxchg_flag(&lock->head_tail, old.head_tail, new.head_tail);
 }
 
 static __always_inline void __ticket_spin_unlock(arch_spinlock_t *lock)
-- 
1.7.6

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