1 files changed, 17 insertions, 9 deletions

diff --git a/include/asm-mips/spinlock.h b/include/asm-mips/spinlock.h
index 4d0135b11156..669b8e349ff2 100644
--- a/include/asm-mips/spinlock.h
+++ b/include/asm-mips/spinlock.h
@@ -9,17 +9,16 @@
 #ifndef _ASM_SPINLOCK_H
 #define _ASM_SPINLOCK_H
 
-#include <linux/config.h>
 #include <asm/war.h>
 
 /*
  * Your basic SMP spinlocks, allowing only a single CPU anywhere
  */
 
-#define __raw_spin_is_locked(x) ((x)->lock != 0)
+#define __raw_spin_is_locked(x)       ((x)->lock != 0)
 #define __raw_spin_lock_flags(lock, flags) __raw_spin_lock(lock)
 #define __raw_spin_unlock_wait(x) \
-                do { cpu_relax(); } while ((x)->lock)
+        do { cpu_relax(); } while ((x)->lock)
 
 /*
  * Simple spin lock operations.  There are two variants, one clears IRQ's
@@ -119,6 +118,18 @@ static inline unsigned int __raw_spin_trylock(raw_spinlock_t *lock)
  * read-locks.
  */
 
+/*
+ * read_can_lock - would read_trylock() succeed?
+ * @lock: the rwlock in question.
+ */
+#define __raw_read_can_lock(rw) ((rw)->lock >= 0)
+
+/*
+ * write_can_lock - would write_trylock() succeed?
+ * @lock: the rwlock in question.
+ */
+#define __raw_write_can_lock(rw)        (!(rw)->lock)
+
 static inline void __raw_read_lock(raw_rwlock_t *rw)
 {
         unsigned int tmp;
@@ -197,8 +208,7 @@ static inline void __raw_write_lock(raw_rwlock_t *rw)
                 "        lui    %1, 0x8000                              \n"
                 "       sc      %1, %0                                  \n"
                 "       beqzl   %1, 1b                                  \n"
-                "        nop                                            \n"
-                "       sync                                            \n"
+                "        sync                                           \n"
                 "       .set    reorder                                 \n"
                 : "=m" (rw->lock), "=&r" (tmp)
                 : "m" (rw->lock)
@@ -211,8 +221,7 @@ static inline void __raw_write_lock(raw_rwlock_t *rw)
                 "        lui    %1, 0x8000                              \n"
                 "       sc      %1, %0                                  \n"
                 "       beqz    %1, 1b                                  \n"
-                "        nop                                            \n"
-                "       sync                                            \n"
+                "        sync                                           \n"
                 "       .set    reorder                                 \n"
                 : "=m" (rw->lock), "=&r" (tmp)
                 : "m" (rw->lock)
@@ -246,8 +255,7 @@ static inline int __raw_write_trylock(raw_rwlock_t *rw)
                 "        lui    %1, 0x8000                              \n"
                 "       sc      %1, %0                                  \n"
                 "       beqzl   %1, 1b                                  \n"
-                "        nop                                            \n"
-                "       sync                                            \n"
+                "        sync                                           \n"
                 "       li      %2, 1                                   \n"
                 "       .set    reorder                                 \n"
                 "2:                                                     \n"