mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-26 02:39:48 +00:00
![Thomas Gleixner](/assets/img/avatar_default.png)
Not strictly necessary for -rt as -rt does not have non sleeping rwlocks, but it's odd to not have a consistent naming convention. No functional change. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: Peter Zijlstra <peterz@infradead.org> Acked-by: David S. Miller <davem@davemloft.net> Acked-by: Ingo Molnar <mingo@elte.hu> Cc: linux-arch@vger.kernel.org
56 lines
1.4 KiB
C
56 lines
1.4 KiB
C
#ifndef __LINUX_RWLOCK_TYPES_H
|
|
#define __LINUX_RWLOCK_TYPES_H
|
|
|
|
/*
|
|
* include/linux/rwlock_types.h - generic rwlock type definitions
|
|
* and initializers
|
|
*
|
|
* portions Copyright 2005, Red Hat, Inc., Ingo Molnar
|
|
* Released under the General Public License (GPL).
|
|
*/
|
|
typedef struct {
|
|
arch_rwlock_t raw_lock;
|
|
#ifdef CONFIG_GENERIC_LOCKBREAK
|
|
unsigned int break_lock;
|
|
#endif
|
|
#ifdef CONFIG_DEBUG_SPINLOCK
|
|
unsigned int magic, owner_cpu;
|
|
void *owner;
|
|
#endif
|
|
#ifdef CONFIG_DEBUG_LOCK_ALLOC
|
|
struct lockdep_map dep_map;
|
|
#endif
|
|
} rwlock_t;
|
|
|
|
#define RWLOCK_MAGIC 0xdeaf1eed
|
|
|
|
#ifdef CONFIG_DEBUG_LOCK_ALLOC
|
|
# define RW_DEP_MAP_INIT(lockname) .dep_map = { .name = #lockname }
|
|
#else
|
|
# define RW_DEP_MAP_INIT(lockname)
|
|
#endif
|
|
|
|
#ifdef CONFIG_DEBUG_SPINLOCK
|
|
#define __RW_LOCK_UNLOCKED(lockname) \
|
|
(rwlock_t) { .raw_lock = __ARCH_RW_LOCK_UNLOCKED, \
|
|
.magic = RWLOCK_MAGIC, \
|
|
.owner = SPINLOCK_OWNER_INIT, \
|
|
.owner_cpu = -1, \
|
|
RW_DEP_MAP_INIT(lockname) }
|
|
#else
|
|
#define __RW_LOCK_UNLOCKED(lockname) \
|
|
(rwlock_t) { .raw_lock = __ARCH_RW_LOCK_UNLOCKED, \
|
|
RW_DEP_MAP_INIT(lockname) }
|
|
#endif
|
|
|
|
/*
|
|
* RW_LOCK_UNLOCKED defeat lockdep state tracking and is hence
|
|
* deprecated.
|
|
*
|
|
* Please use DEFINE_RWLOCK() or __RW_LOCK_UNLOCKED() as appropriate.
|
|
*/
|
|
#define RW_LOCK_UNLOCKED __RW_LOCK_UNLOCKED(old_style_rw_init)
|
|
|
|
#define DEFINE_RWLOCK(x) rwlock_t x = __RW_LOCK_UNLOCKED(x)
|
|
|
|
#endif /* __LINUX_RWLOCK_TYPES_H */
|