mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-24 05:04:00 +08:00
b97c4bc167
Currently sparse does not work with inline spinlock and rwlock functions. The problem is that they do not use the __acquires/__releases out-of-line functions, but use inline functions with no sparse annotations. This patch adds the appropriate annotations to make it work properly. Signed-off-by: Luca Barbieri <luca@luca-barbieri.com> Cc: Ingo Molnar <mingo@elte.hu> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
126 lines
4.3 KiB
C
126 lines
4.3 KiB
C
#ifndef __LINUX_RWLOCK_H
|
|
#define __LINUX_RWLOCK_H
|
|
|
|
#ifndef __LINUX_SPINLOCK_H
|
|
# error "please don't include this file directly"
|
|
#endif
|
|
|
|
/*
|
|
* rwlock related methods
|
|
*
|
|
* split out from spinlock.h
|
|
*
|
|
* portions Copyright 2005, Red Hat, Inc., Ingo Molnar
|
|
* Released under the General Public License (GPL).
|
|
*/
|
|
|
|
#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
|
|
|
|
#ifdef CONFIG_DEBUG_SPINLOCK
|
|
extern void do_raw_read_lock(rwlock_t *lock) __acquires(lock);
|
|
#define do_raw_read_lock_flags(lock, flags) do_raw_read_lock(lock)
|
|
extern int do_raw_read_trylock(rwlock_t *lock);
|
|
extern void do_raw_read_unlock(rwlock_t *lock) __releases(lock);
|
|
extern void do_raw_write_lock(rwlock_t *lock) __acquires(lock);
|
|
#define do_raw_write_lock_flags(lock, flags) do_raw_write_lock(lock)
|
|
extern int do_raw_write_trylock(rwlock_t *lock);
|
|
extern void do_raw_write_unlock(rwlock_t *lock) __releases(lock);
|
|
#else
|
|
# define do_raw_read_lock(rwlock) do {__acquire(lock); arch_read_lock(&(rwlock)->raw_lock); } while (0)
|
|
# define do_raw_read_lock_flags(lock, flags) \
|
|
do {__acquire(lock); arch_read_lock_flags(&(lock)->raw_lock, *(flags)); } while (0)
|
|
# define do_raw_read_trylock(rwlock) arch_read_trylock(&(rwlock)->raw_lock)
|
|
# define do_raw_read_unlock(rwlock) do {arch_read_unlock(&(rwlock)->raw_lock); __release(lock); } while (0)
|
|
# define do_raw_write_lock(rwlock) do {__acquire(lock); arch_write_lock(&(rwlock)->raw_lock); } while (0)
|
|
# define do_raw_write_lock_flags(lock, flags) \
|
|
do {__acquire(lock); arch_write_lock_flags(&(lock)->raw_lock, *(flags)); } while (0)
|
|
# define do_raw_write_trylock(rwlock) arch_write_trylock(&(rwlock)->raw_lock)
|
|
# define do_raw_write_unlock(rwlock) do {arch_write_unlock(&(rwlock)->raw_lock); __release(lock); } while (0)
|
|
#endif
|
|
|
|
#define read_can_lock(rwlock) arch_read_can_lock(&(rwlock)->raw_lock)
|
|
#define write_can_lock(rwlock) arch_write_can_lock(&(rwlock)->raw_lock)
|
|
|
|
/*
|
|
* Define the various 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 read_trylock(lock) __cond_lock(lock, _raw_read_trylock(lock))
|
|
#define write_trylock(lock) __cond_lock(lock, _raw_write_trylock(lock))
|
|
|
|
#define write_lock(lock) _raw_write_lock(lock)
|
|
#define read_lock(lock) _raw_read_lock(lock)
|
|
|
|
#if defined(CONFIG_SMP) || defined(CONFIG_DEBUG_SPINLOCK)
|
|
|
|
#define read_lock_irqsave(lock, flags) \
|
|
do { \
|
|
typecheck(unsigned long, flags); \
|
|
flags = _raw_read_lock_irqsave(lock); \
|
|
} while (0)
|
|
#define write_lock_irqsave(lock, flags) \
|
|
do { \
|
|
typecheck(unsigned long, flags); \
|
|
flags = _raw_write_lock_irqsave(lock); \
|
|
} while (0)
|
|
|
|
#else
|
|
|
|
#define read_lock_irqsave(lock, flags) \
|
|
do { \
|
|
typecheck(unsigned long, flags); \
|
|
_raw_read_lock_irqsave(lock, flags); \
|
|
} while (0)
|
|
#define write_lock_irqsave(lock, flags) \
|
|
do { \
|
|
typecheck(unsigned long, flags); \
|
|
_raw_write_lock_irqsave(lock, flags); \
|
|
} while (0)
|
|
|
|
#endif
|
|
|
|
#define read_lock_irq(lock) _raw_read_lock_irq(lock)
|
|
#define read_lock_bh(lock) _raw_read_lock_bh(lock)
|
|
#define write_lock_irq(lock) _raw_write_lock_irq(lock)
|
|
#define write_lock_bh(lock) _raw_write_lock_bh(lock)
|
|
#define read_unlock(lock) _raw_read_unlock(lock)
|
|
#define write_unlock(lock) _raw_write_unlock(lock)
|
|
#define read_unlock_irq(lock) _raw_read_unlock_irq(lock)
|
|
#define write_unlock_irq(lock) _raw_write_unlock_irq(lock)
|
|
|
|
#define read_unlock_irqrestore(lock, flags) \
|
|
do { \
|
|
typecheck(unsigned long, flags); \
|
|
_raw_read_unlock_irqrestore(lock, flags); \
|
|
} while (0)
|
|
#define read_unlock_bh(lock) _raw_read_unlock_bh(lock)
|
|
|
|
#define write_unlock_irqrestore(lock, flags) \
|
|
do { \
|
|
typecheck(unsigned long, flags); \
|
|
_raw_write_unlock_irqrestore(lock, flags); \
|
|
} while (0)
|
|
#define write_unlock_bh(lock) _raw_write_unlock_bh(lock)
|
|
|
|
#define write_trylock_irqsave(lock, flags) \
|
|
({ \
|
|
local_irq_save(flags); \
|
|
write_trylock(lock) ? \
|
|
1 : ({ local_irq_restore(flags); 0; }); \
|
|
})
|
|
|
|
#endif /* __LINUX_RWLOCK_H */
|