diff options
Diffstat (limited to 'include/linux/lglock.h')
| -rw-r--r-- | include/linux/lglock.h | 125 |
1 files changed, 26 insertions, 99 deletions
diff --git a/include/linux/lglock.h b/include/linux/lglock.h index 0fdd821e77b7..f01e5f6d1f07 100644 --- a/include/linux/lglock.h +++ b/include/linux/lglock.h @@ -23,26 +23,17 @@ #include <linux/lockdep.h> #include <linux/percpu.h> #include <linux/cpu.h> +#include <linux/notifier.h> /* can make br locks by using local lock for read side, global lock for write */ -#define br_lock_init(name) name##_lock_init() -#define br_read_lock(name) name##_local_lock() -#define br_read_unlock(name) name##_local_unlock() -#define br_write_lock(name) name##_global_lock() -#define br_write_unlock(name) name##_global_unlock() +#define br_lock_init(name) lg_lock_init(name, #name) +#define br_read_lock(name) lg_local_lock(name) +#define br_read_unlock(name) lg_local_unlock(name) +#define br_write_lock(name) lg_global_lock(name) +#define br_write_unlock(name) lg_global_unlock(name) -#define DECLARE_BRLOCK(name) DECLARE_LGLOCK(name) #define DEFINE_BRLOCK(name) DEFINE_LGLOCK(name) - -#define lg_lock_init(name) name##_lock_init() -#define lg_local_lock(name) name##_local_lock() -#define lg_local_unlock(name) name##_local_unlock() -#define lg_local_lock_cpu(name, cpu) name##_local_lock_cpu(cpu) -#define lg_local_unlock_cpu(name, cpu) name##_local_unlock_cpu(cpu) -#define lg_global_lock(name) name##_global_lock() -#define lg_global_unlock(name) name##_global_unlock() - #ifdef CONFIG_DEBUG_LOCK_ALLOC #define LOCKDEP_INIT_MAP lockdep_init_map @@ -57,90 +48,26 @@ #define DEFINE_LGLOCK_LOCKDEP(name) #endif - -#define DECLARE_LGLOCK(name) \ - extern void name##_lock_init(void); \ - extern void name##_local_lock(void); \ - extern void name##_local_unlock(void); \ - extern void name##_local_lock_cpu(int cpu); \ - extern void name##_local_unlock_cpu(int cpu); \ - extern void name##_global_lock(void); \ - extern void name##_global_unlock(void); \ +struct lglock { + arch_spinlock_t __percpu *lock; +#ifdef CONFIG_DEBUG_LOCK_ALLOC + struct lock_class_key lock_key; + struct lockdep_map lock_dep_map; +#endif +}; #define DEFINE_LGLOCK(name) \ - \ - DEFINE_SPINLOCK(name##_cpu_lock); \ - DEFINE_PER_CPU(arch_spinlock_t, name##_lock); \ - DEFINE_LGLOCK_LOCKDEP(name); \ - \ - void name##_lock_init(void) { \ - int i; \ - LOCKDEP_INIT_MAP(&name##_lock_dep_map, #name, &name##_lock_key, 0); \ - for_each_possible_cpu(i) { \ - arch_spinlock_t *lock; \ - lock = &per_cpu(name##_lock, i); \ - *lock = (arch_spinlock_t)__ARCH_SPIN_LOCK_UNLOCKED; \ - } \ - } \ - EXPORT_SYMBOL(name##_lock_init); \ - \ - void name##_local_lock(void) { \ - arch_spinlock_t *lock; \ - preempt_disable(); \ - rwlock_acquire_read(&name##_lock_dep_map, 0, 0, _THIS_IP_); \ - lock = &__get_cpu_var(name##_lock); \ - arch_spin_lock(lock); \ - } \ - EXPORT_SYMBOL(name##_local_lock); \ - \ - void name##_local_unlock(void) { \ - arch_spinlock_t *lock; \ - rwlock_release(&name##_lock_dep_map, 1, _THIS_IP_); \ - lock = &__get_cpu_var(name##_lock); \ - arch_spin_unlock(lock); \ - preempt_enable(); \ - } \ - EXPORT_SYMBOL(name##_local_unlock); \ - \ - void name##_local_lock_cpu(int cpu) { \ - arch_spinlock_t *lock; \ - preempt_disable(); \ - rwlock_acquire_read(&name##_lock_dep_map, 0, 0, _THIS_IP_); \ - lock = &per_cpu(name##_lock, cpu); \ - arch_spin_lock(lock); \ - } \ - EXPORT_SYMBOL(name##_local_lock_cpu); \ - \ - void name##_local_unlock_cpu(int cpu) { \ - arch_spinlock_t *lock; \ - rwlock_release(&name##_lock_dep_map, 1, _THIS_IP_); \ - lock = &per_cpu(name##_lock, cpu); \ - arch_spin_unlock(lock); \ - preempt_enable(); \ - } \ - EXPORT_SYMBOL(name##_local_unlock_cpu); \ - \ - void name##_global_lock(void) { \ - int i; \ - preempt_disable(); \ - rwlock_acquire(&name##_lock_dep_map, 0, 0, _RET_IP_); \ - for_each_possible_cpu(i) { \ - arch_spinlock_t *lock; \ - lock = &per_cpu(name##_lock, i); \ - arch_spin_lock(lock); \ - } \ - } \ - EXPORT_SYMBOL(name##_global_lock); \ - \ - void name##_global_unlock(void) { \ - int i; \ - rwlock_release(&name##_lock_dep_map, 1, _RET_IP_); \ - for_each_possible_cpu(i) { \ - arch_spinlock_t *lock; \ - lock = &per_cpu(name##_lock, i); \ - arch_spin_unlock(lock); \ - } \ - preempt_enable(); \ - } \ - EXPORT_SYMBOL(name##_global_unlock); + DEFINE_LGLOCK_LOCKDEP(name); \ + DEFINE_PER_CPU(arch_spinlock_t, name ## _lock) \ + = __ARCH_SPIN_LOCK_UNLOCKED; \ + struct lglock name = { .lock = &name ## _lock } + +void lg_lock_init(struct lglock *lg, char *name); +void lg_local_lock(struct lglock *lg); +void lg_local_unlock(struct lglock *lg); +void lg_local_lock_cpu(struct lglock *lg, int cpu); +void lg_local_unlock_cpu(struct lglock *lg, int cpu); +void lg_global_lock(struct lglock *lg); +void lg_global_unlock(struct lglock *lg); + #endif |