locking: Split rwlock from spinlock headers
Move the rwlock defines and inlines into separate header files. This
makes the selection for -rt easier.
No functional change.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Peter Zijlstra <peterz@infradead.org>
Acked-by: Ingo Molnar <mingo@elte.hu>
diff --git a/include/linux/spinlock.h b/include/linux/spinlock.h
index 71dccfe..a9aaa70 100644
--- a/include/linux/spinlock.h
+++ b/include/linux/spinlock.h
@@ -103,20 +103,6 @@
do { *(lock) = __SPIN_LOCK_UNLOCKED(lock); } while (0)
#endif
-#ifdef CONFIG_DEBUG_SPINLOCK
- extern void __rwlock_init(rwlock_t *lock, const char *name,
- struct lock_class_key *key);
-# define rwlock_init(lock) \
-do { \
- static struct lock_class_key __key; \
- \
- __rwlock_init((lock), #lock, &__key); \
-} while (0)
-#else
-# define rwlock_init(lock) \
- do { *(lock) = __RW_LOCK_UNLOCKED(lock); } while (0)
-#endif
-
#define spin_is_locked(lock) __raw_spin_is_locked(&(lock)->raw_lock)
#ifdef CONFIG_GENERIC_LOCKBREAK
@@ -146,43 +132,21 @@
#define _raw_spin_lock_flags(lock, flags) _raw_spin_lock(lock)
extern int _raw_spin_trylock(spinlock_t *lock);
extern void _raw_spin_unlock(spinlock_t *lock);
- extern void _raw_read_lock(rwlock_t *lock);
-#define _raw_read_lock_flags(lock, flags) _raw_read_lock(lock)
- extern int _raw_read_trylock(rwlock_t *lock);
- extern void _raw_read_unlock(rwlock_t *lock);
- extern void _raw_write_lock(rwlock_t *lock);
-#define _raw_write_lock_flags(lock, flags) _raw_write_lock(lock)
- extern int _raw_write_trylock(rwlock_t *lock);
- extern void _raw_write_unlock(rwlock_t *lock);
#else
# define _raw_spin_lock(lock) __raw_spin_lock(&(lock)->raw_lock)
# define _raw_spin_lock_flags(lock, flags) \
__raw_spin_lock_flags(&(lock)->raw_lock, *(flags))
# define _raw_spin_trylock(lock) __raw_spin_trylock(&(lock)->raw_lock)
# define _raw_spin_unlock(lock) __raw_spin_unlock(&(lock)->raw_lock)
-# define _raw_read_lock(rwlock) __raw_read_lock(&(rwlock)->raw_lock)
-# define _raw_read_lock_flags(lock, flags) \
- __raw_read_lock_flags(&(lock)->raw_lock, *(flags))
-# define _raw_read_trylock(rwlock) __raw_read_trylock(&(rwlock)->raw_lock)
-# define _raw_read_unlock(rwlock) __raw_read_unlock(&(rwlock)->raw_lock)
-# define _raw_write_lock(rwlock) __raw_write_lock(&(rwlock)->raw_lock)
-# define _raw_write_lock_flags(lock, flags) \
- __raw_write_lock_flags(&(lock)->raw_lock, *(flags))
-# define _raw_write_trylock(rwlock) __raw_write_trylock(&(rwlock)->raw_lock)
-# define _raw_write_unlock(rwlock) __raw_write_unlock(&(rwlock)->raw_lock)
#endif
-#define read_can_lock(rwlock) __raw_read_can_lock(&(rwlock)->raw_lock)
-#define write_can_lock(rwlock) __raw_write_can_lock(&(rwlock)->raw_lock)
-
/*
- * Define the various spin_lock and rw_lock methods. Note we define these
- * regardless of whether CONFIG_SMP or CONFIG_PREEMPT are set. The various
- * methods are defined as nops in the case they are not required.
+ * Define the various spin_lock methods. Note we define these
+ * regardless of whether CONFIG_SMP or CONFIG_PREEMPT are set. The
+ * various methods are defined as nops in the case they are not
+ * required.
*/
#define spin_trylock(lock) __cond_lock(lock, _spin_trylock(lock))
-#define read_trylock(lock) __cond_lock(lock, _read_trylock(lock))
-#define write_trylock(lock) __cond_lock(lock, _write_trylock(lock))
#define spin_lock(lock) _spin_lock(lock)
@@ -198,9 +162,6 @@
# define spin_lock_nest_lock(lock, nest_lock) _spin_lock(lock)
#endif
-#define write_lock(lock) _write_lock(lock)
-#define read_lock(lock) _read_lock(lock)
-
#if defined(CONFIG_SMP) || defined(CONFIG_DEBUG_SPINLOCK)
#define spin_lock_irqsave(lock, flags) \
@@ -208,16 +169,6 @@
typecheck(unsigned long, flags); \
flags = _spin_lock_irqsave(lock); \
} while (0)
-#define read_lock_irqsave(lock, flags) \
- do { \
- typecheck(unsigned long, flags); \
- flags = _read_lock_irqsave(lock); \
- } while (0)
-#define write_lock_irqsave(lock, flags) \
- do { \
- typecheck(unsigned long, flags); \
- flags = _write_lock_irqsave(lock); \
- } while (0)
#ifdef CONFIG_DEBUG_LOCK_ALLOC
#define spin_lock_irqsave_nested(lock, flags, subclass) \
@@ -240,16 +191,7 @@
typecheck(unsigned long, flags); \
_spin_lock_irqsave(lock, flags); \
} while (0)
-#define read_lock_irqsave(lock, flags) \
- do { \
- typecheck(unsigned long, flags); \
- _read_lock_irqsave(lock, flags); \
- } while (0)
-#define write_lock_irqsave(lock, flags) \
- do { \
- typecheck(unsigned long, flags); \
- _write_lock_irqsave(lock, flags); \
- } while (0)
+
#define spin_lock_irqsave_nested(lock, flags, subclass) \
spin_lock_irqsave(lock, flags)
@@ -257,16 +199,8 @@
#define spin_lock_irq(lock) _spin_lock_irq(lock)
#define spin_lock_bh(lock) _spin_lock_bh(lock)
-#define read_lock_irq(lock) _read_lock_irq(lock)
-#define read_lock_bh(lock) _read_lock_bh(lock)
-#define write_lock_irq(lock) _write_lock_irq(lock)
-#define write_lock_bh(lock) _write_lock_bh(lock)
#define spin_unlock(lock) _spin_unlock(lock)
-#define read_unlock(lock) _read_unlock(lock)
-#define write_unlock(lock) _write_unlock(lock)
#define spin_unlock_irq(lock) _spin_unlock_irq(lock)
-#define read_unlock_irq(lock) _read_unlock_irq(lock)
-#define write_unlock_irq(lock) _write_unlock_irq(lock)
#define spin_unlock_irqrestore(lock, flags) \
do { \
@@ -275,20 +209,6 @@
} while (0)
#define spin_unlock_bh(lock) _spin_unlock_bh(lock)
-#define read_unlock_irqrestore(lock, flags) \
- do { \
- typecheck(unsigned long, flags); \
- _read_unlock_irqrestore(lock, flags); \
- } while (0)
-#define read_unlock_bh(lock) _read_unlock_bh(lock)
-
-#define write_unlock_irqrestore(lock, flags) \
- do { \
- typecheck(unsigned long, flags); \
- _write_unlock_irqrestore(lock, flags); \
- } while (0)
-#define write_unlock_bh(lock) _write_unlock_bh(lock)
-
#define spin_trylock_bh(lock) __cond_lock(lock, _spin_trylock_bh(lock))
#define spin_trylock_irq(lock) \
@@ -305,13 +225,6 @@
1 : ({ local_irq_restore(flags); 0; }); \
})
-#define write_trylock_irqsave(lock, flags) \
-({ \
- local_irq_save(flags); \
- write_trylock(lock) ? \
- 1 : ({ local_irq_restore(flags); 0; }); \
-})
-
/*
* Pull the atomic_t declaration:
* (asm-mips/atomic.h needs above definitions)
@@ -335,6 +248,9 @@
*/
#define spin_can_lock(lock) (!spin_is_locked(lock))
+/* Include rwlock functions */
+#include <linux/rwlock.h>
+
/*
* Pull the _spin_*()/_read_*()/_write_*() functions/declarations:
*/