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-rw-r--r--include/asm-sparc/spinlock.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/include/asm-sparc/spinlock.h b/include/asm-sparc/spinlock.h
index 3350c90..1c75474 100644
--- a/include/asm-sparc/spinlock.h
+++ b/include/asm-sparc/spinlock.h
@@ -154,6 +154,9 @@ static inline int __raw_write_trylock(raw_rwlock_t *rw)
#define __raw_spin_lock_flags(lock, flags) __raw_spin_lock(lock)
#define __raw_read_trylock(lock) generic__raw_read_trylock(lock)
+#define __raw_read_can_lock(rw) (!((rw)->lock & 0xff))
+#define __raw_write_can_lock(rw) (!(rw)->lock)
+
#endif /* !(__ASSEMBLY__) */
#endif /* __SPARC_SPINLOCK_H */
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