X-Git-Url: http://pilppa.org/gitweb/gitweb.cgi?a=blobdiff_plain;f=include%2Fasm-sh%2Frwsem.h;h=1987f3ea7f1b1422d8ae5ad02003d6f6c29a770a;hb=a9e82d3a02247af6b729be0a963862d70cb25bf9;hp=0262d3d1e5e018a2ddb9e7913d48124eb4311a4e;hpb=9e0cb06b17be7e562cbdaba2768649f025826dc6;p=linux-2.6-omap-h63xx.git

diff --git a/include/asm-sh/rwsem.h b/include/asm-sh/rwsem.h
index 0262d3d1e5e..1987f3ea7f1 100644
--- a/include/asm-sh/rwsem.h
+++ b/include/asm-sh/rwsem.h
@@ -1,11 +1,15 @@
 /*
- * include/asm-ppc/rwsem.h: R/W semaphores for SH using the stuff
+ * include/asm-sh/rwsem.h: R/W semaphores for SH using the stuff
  * in lib/rwsem.c.
  */
 
 #ifndef _ASM_SH_RWSEM_H
 #define _ASM_SH_RWSEM_H
 
+#ifndef _LINUX_RWSEM_H
+#error "please don't include asm/rwsem.h directly, use linux/rwsem.h instead"
+#endif
+
 #ifdef __KERNEL__
 #include <linux/list.h>
 #include <linux/spinlock.h>
@@ -25,24 +29,21 @@ struct rw_semaphore {
 #define RWSEM_ACTIVE_WRITE_BIAS		(RWSEM_WAITING_BIAS + RWSEM_ACTIVE_BIAS)
 	spinlock_t		wait_lock;
 	struct list_head	wait_list;
-#if RWSEM_DEBUG
-	int			debug;
+#ifdef CONFIG_DEBUG_LOCK_ALLOC
+	struct lockdep_map	dep_map;
 #endif
 };
 
-/*
- * initialisation
- */
-#if RWSEM_DEBUG
-#define __RWSEM_DEBUG_INIT      , 0
+#ifdef CONFIG_DEBUG_LOCK_ALLOC
+# define __RWSEM_DEP_MAP_INIT(lockname) , .dep_map = { .name = #lockname }
 #else
-#define __RWSEM_DEBUG_INIT	/* */
+# define __RWSEM_DEP_MAP_INIT(lockname)
 #endif
 
 #define __RWSEM_INITIALIZER(name) \
 	{ RWSEM_UNLOCKED_VALUE, SPIN_LOCK_UNLOCKED, \
 	  LIST_HEAD_INIT((name).wait_list) \
-	  __RWSEM_DEBUG_INIT }
+	  __RWSEM_DEP_MAP_INIT(name) }
 
 #define DECLARE_RWSEM(name)		\
 	struct rw_semaphore name = __RWSEM_INITIALIZER(name)
@@ -52,14 +53,21 @@ extern struct rw_semaphore *rwsem_down_write_failed(struct rw_semaphore *sem);
 extern struct rw_semaphore *rwsem_wake(struct rw_semaphore *sem);
 extern struct rw_semaphore *rwsem_downgrade_wake(struct rw_semaphore *sem);
 
+extern void __init_rwsem(struct rw_semaphore *sem, const char *name,
+			 struct lock_class_key *key);
+
+#define init_rwsem(sem)				\
+do {						\
+	static struct lock_class_key __key;	\
+						\
+	__init_rwsem((sem), #sem, &__key);	\
+} while (0)
+
 static inline void init_rwsem(struct rw_semaphore *sem)
 {
 	sem->count = RWSEM_UNLOCKED_VALUE;
 	spin_lock_init(&sem->wait_lock);
 	INIT_LIST_HEAD(&sem->wait_list);
-#if RWSEM_DEBUG
-	sem->debug = 0;
-#endif
 }
 
 /*
@@ -157,6 +165,11 @@ static inline void __downgrade_write(struct rw_semaphore *sem)
 		rwsem_downgrade_wake(sem);
 }
 
+static inline void __down_write_nested(struct rw_semaphore *sem, int subclass)
+{
+	__down_write(sem);
+}
+
 /*
  * implement exchange and add functionality
  */