---

yaml --- r: 148755 b: refs/heads/master c: ce58ae6 h: refs/heads/master i: 148753: 117b74a 148751: 550a00b v: v3
git-mirror · Jun 12, 2009 · 8569b49 · 8569b49
1 parent f882725
commit 8569b49
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Showing 3 changed files with 57 additions and 4 deletions.
diff --git a/[refs] b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 76d4e00a05d06c1d1552adea24fcf6182c9d8999
+refs/heads/master: ce58ae6f7f6bdd48c87472ff830a6d586ff076b2
diff --git a/trunk/arch/s390/include/asm/spinlock.h b/trunk/arch/s390/include/asm/spinlock.h
@@ -122,8 +122,10 @@ static inline void __raw_spin_unlock(raw_spinlock_t *lp)
 #define __raw_write_can_lock(x) ((x)->lock == 0)
 
 extern void _raw_read_lock_wait(raw_rwlock_t *lp);
+extern void _raw_read_lock_wait_flags(raw_rwlock_t *lp, unsigned long flags);
 extern int _raw_read_trylock_retry(raw_rwlock_t *lp);
 extern void _raw_write_lock_wait(raw_rwlock_t *lp);
+extern void _raw_write_lock_wait_flags(raw_rwlock_t *lp, unsigned long flags);
 extern int _raw_write_trylock_retry(raw_rwlock_t *lp);
 
 static inline void __raw_read_lock(raw_rwlock_t *rw)
@@ -134,6 +136,14 @@ static inline void __raw_read_lock(raw_rwlock_t *rw)
 		_raw_read_lock_wait(rw);
 }
 
+static inline void __raw_read_lock_flags(raw_rwlock_t *rw, unsigned long flags)
+{
+	unsigned int old;
+	old = rw->lock & 0x7fffffffU;
+	if (_raw_compare_and_swap(&rw->lock, old, old + 1) != old)
+		_raw_read_lock_wait_flags(rw, flags);
+}
+
 static inline void __raw_read_unlock(raw_rwlock_t *rw)
 {
 	unsigned int old, cmp;
@@ -151,6 +161,12 @@ static inline void __raw_write_lock(raw_rwlock_t *rw)
 		_raw_write_lock_wait(rw);
 }
 
+static inline void __raw_write_lock_flags(raw_rwlock_t *rw, unsigned long flags)
+{
+	if (unlikely(_raw_compare_and_swap(&rw->lock, 0, 0x80000000) != 0))
+		_raw_write_lock_wait_flags(rw, flags);
+}
+
 static inline void __raw_write_unlock(raw_rwlock_t *rw)
 {
 	_raw_compare_and_swap(&rw->lock, 0x80000000, 0);
@@ -172,9 +188,6 @@ static inline int __raw_write_trylock(raw_rwlock_t *rw)
 	return _raw_write_trylock_retry(rw);
 }
 
-#define __raw_read_lock_flags(lock, flags) __raw_read_lock(lock)
-#define __raw_write_lock_flags(lock, flags) __raw_write_lock(lock)
-
 #define _raw_read_relax(lock)	cpu_relax()
 #define _raw_write_relax(lock)	cpu_relax()
 

diff --git a/trunk/arch/s390/lib/spinlock.c b/trunk/arch/s390/lib/spinlock.c
@@ -124,6 +124,27 @@ void _raw_read_lock_wait(raw_rwlock_t *rw)
 }
 EXPORT_SYMBOL(_raw_read_lock_wait);
 
+void _raw_read_lock_wait_flags(raw_rwlock_t *rw, unsigned long flags)
+{
+	unsigned int old;
+	int count = spin_retry;
+
+	local_irq_restore(flags);
+	while (1) {
+		if (count-- <= 0) {
+			_raw_yield();
+			count = spin_retry;
+		}
+		if (!__raw_read_can_lock(rw))
+			continue;
+		old = rw->lock & 0x7fffffffU;
+		local_irq_disable();
+		if (_raw_compare_and_swap(&rw->lock, old, old + 1) == old)
+			return;
+	}
+}
+EXPORT_SYMBOL(_raw_read_lock_wait_flags);
+
 int _raw_read_trylock_retry(raw_rwlock_t *rw)
 {
 	unsigned int old;
@@ -157,6 +178,25 @@ void _raw_write_lock_wait(raw_rwlock_t *rw)
 }
 EXPORT_SYMBOL(_raw_write_lock_wait);
 
+void _raw_write_lock_wait_flags(raw_rwlock_t *rw, unsigned long flags)
+{
+	int count = spin_retry;
+
+	local_irq_restore(flags);
+	while (1) {
+		if (count-- <= 0) {
+			_raw_yield();
+			count = spin_retry;
+		}
+		if (!__raw_write_can_lock(rw))
+			continue;
+		local_irq_disable();
+		if (_raw_compare_and_swap(&rw->lock, 0, 0x80000000) == 0)
+			return;
+	}
+}
+EXPORT_SYMBOL(_raw_write_lock_wait_flags);
+
 int _raw_write_trylock_retry(raw_rwlock_t *rw)
 {
 	int count = spin_retry;