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Diffstat (limited to 'arch/sh/include/asm/spinlock.h')
-rw-r--r--arch/sh/include/asm/spinlock.h10
1 files changed, 8 insertions, 2 deletions
diff --git a/arch/sh/include/asm/spinlock.h b/arch/sh/include/asm/spinlock.h
index bdc0f3b6c56a..416834b60ad0 100644
--- a/arch/sh/include/asm/spinlock.h
+++ b/arch/sh/include/asm/spinlock.h
@@ -19,14 +19,20 @@
#error "Need movli.l/movco.l for spinlocks"
#endif
+#include <asm/barrier.h>
+#include <asm/processor.h>
+
/*
* Your basic SMP spinlocks, allowing only a single CPU anywhere
*/
#define arch_spin_is_locked(x) ((x)->lock <= 0)
#define arch_spin_lock_flags(lock, flags) arch_spin_lock(lock)
-#define arch_spin_unlock_wait(x) \
- do { while (arch_spin_is_locked(x)) cpu_relax(); } while (0)
+
+static inline void arch_spin_unlock_wait(arch_spinlock_t *lock)
+{
+ smp_cond_load_acquire(&lock->lock, VAL > 0);
+}
/*
* Simple spin lock operations. There are two variants, one clears IRQ's