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Diffstat (limited to 'arch/xtensa/include/asm/spinlock.h')
-rw-r--r--arch/xtensa/include/asm/spinlock.h10
1 files changed, 8 insertions, 2 deletions
diff --git a/arch/xtensa/include/asm/spinlock.h b/arch/xtensa/include/asm/spinlock.h
index 1d95fa5dcd10..a36221cf6363 100644
--- a/arch/xtensa/include/asm/spinlock.h
+++ b/arch/xtensa/include/asm/spinlock.h
@@ -11,6 +11,9 @@
#ifndef _XTENSA_SPINLOCK_H
#define _XTENSA_SPINLOCK_H
+#include <asm/barrier.h>
+#include <asm/processor.h>
+
/*
* spinlock
*
@@ -29,8 +32,11 @@
*/
#define arch_spin_is_locked(x) ((x)->slock != 0)
-#define arch_spin_unlock_wait(lock) \
- do { while (arch_spin_is_locked(lock)) cpu_relax(); } while (0)
+
+static inline void arch_spin_unlock_wait(arch_spinlock_t *lock)
+{
+ smp_cond_load_acquire(&lock->slock, !VAL);
+}
#define arch_spin_lock_flags(lock, flags) arch_spin_lock(lock)