2 files changed, 44 insertions, 40 deletions

diff --git a/include/asm-s390/spinlock.h b/include/asm-s390/spinlock.h
index 321b23bba1ec..273dbecf8ace 100644
--- a/include/asm-s390/spinlock.h
+++ b/include/asm-s390/spinlock.h
@@ -27,25 +27,19 @@ _raw_compare_and_swap(volatile unsigned int *lock,
  * on the local processor, one does not.
  *
  * We make no fairness assumptions. They have a cost.
+ *
+ * (the type definitions are in asm/spinlock_types.h)
  */
 
-typedef struct {
-        volatile unsigned int lock;
-#ifdef CONFIG_PREEMPT
-        unsigned int break_lock;
-#endif
-} __attribute__ ((aligned (4))) spinlock_t;
-
-#define SPIN_LOCK_UNLOCKED      (spinlock_t) { 0 }
-#define spin_lock_init(lp)      do { (lp)->lock = 0; } while(0)
-#define spin_unlock_wait(lp)    do { barrier(); } while(((volatile spinlock_t *)(lp))->lock)
-#define spin_is_locked(x)       ((x)->lock != 0)
-#define _raw_spin_lock_flags(lock, flags) _raw_spin_lock(lock)
+#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(lock) \
+        do { while (__raw_spin_is_locked(lock)) cpu_relax(); } while (0)
 
-extern void _raw_spin_lock_wait(spinlock_t *lp, unsigned int pc);
-extern int _raw_spin_trylock_retry(spinlock_t *lp, unsigned int pc);
+extern void _raw_spin_lock_wait(raw_spinlock_t *lp, unsigned int pc);
+extern int _raw_spin_trylock_retry(raw_spinlock_t *lp, unsigned int pc);
 
-static inline void _raw_spin_lock(spinlock_t *lp)
+static inline void __raw_spin_lock(raw_spinlock_t *lp)
 {
         unsigned long pc = 1 | (unsigned long) __builtin_return_address(0);
 
@@ -53,7 +47,7 @@ static inline void _raw_spin_lock(spinlock_t *lp)
                 _raw_spin_lock_wait(lp, pc);
 }
 
-static inline int _raw_spin_trylock(spinlock_t *lp)
+static inline int __raw_spin_trylock(raw_spinlock_t *lp)
 {
         unsigned long pc = 1 | (unsigned long) __builtin_return_address(0);
 
@@ -62,7 +56,7 @@ static inline int _raw_spin_trylock(spinlock_t *lp)
         return _raw_spin_trylock_retry(lp, pc);
 }
 
-static inline void _raw_spin_unlock(spinlock_t *lp)
+static inline void __raw_spin_unlock(raw_spinlock_t *lp)
 {
         _raw_compare_and_swap(&lp->lock, lp->lock, 0);
 }
@@ -77,36 +71,25 @@ static inline void _raw_spin_unlock(spinlock_t *lp)
  * irq-safe write-lock, but readers can get non-irqsafe
  * read-locks.
  */
-typedef struct {
-        volatile unsigned int lock;
-        volatile unsigned long owner_pc;
-#ifdef CONFIG_PREEMPT
-        unsigned int break_lock;
-#endif
-} rwlock_t;
-
-#define RW_LOCK_UNLOCKED (rwlock_t) { 0, 0 }
-
-#define rwlock_init(x)  do { *(x) = RW_LOCK_UNLOCKED; } while(0)
 
 /**
  * read_can_lock - would read_trylock() succeed?
  * @lock: the rwlock in question.
  */
-#define read_can_lock(x) ((int)(x)->lock >= 0)
+#define __raw_read_can_lock(x) ((int)(x)->lock >= 0)
 
 /**
  * write_can_lock - would write_trylock() succeed?
  * @lock: the rwlock in question.
  */
-#define write_can_lock(x) ((x)->lock == 0)
+#define __raw_write_can_lock(x) ((x)->lock == 0)
 
-extern void _raw_read_lock_wait(rwlock_t *lp);
-extern int _raw_read_trylock_retry(rwlock_t *lp);
-extern void _raw_write_lock_wait(rwlock_t *lp);
-extern int _raw_write_trylock_retry(rwlock_t *lp);
+extern void _raw_read_lock_wait(raw_rwlock_t *lp);
+extern int _raw_read_trylock_retry(raw_rwlock_t *lp);
+extern void _raw_write_lock_wait(raw_rwlock_t *lp);
+extern int _raw_write_trylock_retry(raw_rwlock_t *lp);
 
-static inline void _raw_read_lock(rwlock_t *rw)
+static inline void __raw_read_lock(raw_rwlock_t *rw)
 {
         unsigned int old;
         old = rw->lock & 0x7fffffffU;
@@ -114,7 +97,7 @@ static inline void _raw_read_lock(rwlock_t *rw)
                 _raw_read_lock_wait(rw);
 }
 
-static inline void _raw_read_unlock(rwlock_t *rw)
+static inline void __raw_read_unlock(raw_rwlock_t *rw)
 {
         unsigned int old, cmp;
 
@@ -125,18 +108,18 @@ static inline void _raw_read_unlock(rwlock_t *rw)
         } while (cmp != old);
 }
 
-static inline void _raw_write_lock(rwlock_t *rw)
+static inline void __raw_write_lock(raw_rwlock_t *rw)
 {
         if (unlikely(_raw_compare_and_swap(&rw->lock, 0, 0x80000000) != 0))
                 _raw_write_lock_wait(rw);
 }
 
-static inline void _raw_write_unlock(rwlock_t *rw)
+static inline void __raw_write_unlock(raw_rwlock_t *rw)
 {
         _raw_compare_and_swap(&rw->lock, 0x80000000, 0);
 }
 
-static inline int _raw_read_trylock(rwlock_t *rw)
+static inline int __raw_read_trylock(raw_rwlock_t *rw)
 {
         unsigned int old;
         old = rw->lock & 0x7fffffffU;
@@ -145,7 +128,7 @@ static inline int _raw_read_trylock(rwlock_t *rw)
         return _raw_read_trylock_retry(rw);
 }
 
-static inline int _raw_write_trylock(rwlock_t *rw)
+static inline int __raw_write_trylock(raw_rwlock_t *rw)
 {
         if (likely(_raw_compare_and_swap(&rw->lock, 0, 0x80000000) == 0))
                 return 1;
diff --git a/include/asm-s390/spinlock_types.h b/include/asm-s390/spinlock_types.h
new file mode 100644
index 000000000000..f79a2216204f
--- /dev/null
+++ b/include/asm-s390/spinlock_types.h
@@ -0,0 +1,21 @@
+#ifndef __ASM_SPINLOCK_TYPES_H
+#define __ASM_SPINLOCK_TYPES_H
+
+#ifndef __LINUX_SPINLOCK_TYPES_H
+# error "please don't include this file directly"
+#endif
+
+typedef struct {
+        volatile unsigned int lock;
+} __attribute__ ((aligned (4))) raw_spinlock_t;
+
+#define __RAW_SPIN_LOCK_UNLOCKED        { 0 }
+
+typedef struct {
+        volatile unsigned int lock;
+        volatile unsigned int owner_pc;
+} raw_rwlock_t;
+
+#define __RAW_RW_LOCK_UNLOCKED          { 0, 0 }
+
+#endif