diff options
author | Kent Overstreet <kent.overstreet@gmail.com> | 2017-01-08 00:13:18 -0900 |
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committer | Kent Overstreet <kent.overstreet@gmail.com> | 2017-01-20 09:07:08 -0900 |
commit | b33fc8298f7e13226b9895abc57c9bfce5e3fa2d (patch) | |
tree | a3d2a5a909b6372f7777c1c5c18cef5f81d123a9 /include/linux/spinlock.h | |
parent | 7f4191a202ea4558ca2d5eb8a47daea33c9999c7 (diff) |
bcache in userspace; userspace fsck
Diffstat (limited to 'include/linux/spinlock.h')
-rw-r--r-- | include/linux/spinlock.h | 60 |
1 files changed, 60 insertions, 0 deletions
diff --git a/include/linux/spinlock.h b/include/linux/spinlock.h new file mode 100644 index 00000000..0fa79a37 --- /dev/null +++ b/include/linux/spinlock.h @@ -0,0 +1,60 @@ +#ifndef __TOOLS_LINUX_SPINLOCK_H +#define __TOOLS_LINUX_SPINLOCK_H + +#include <linux/atomic.h> + +typedef struct { + int count; +} raw_spinlock_t; + +#define __RAW_SPIN_LOCK_UNLOCKED(name) (raw_spinlock_t) { .count = 0 } + +static inline void raw_spin_lock_init(raw_spinlock_t *lock) +{ + smp_store_release(&lock->count, 0); +} + +static inline void raw_spin_lock(raw_spinlock_t *lock) +{ + while (xchg_acquire(&lock->count, 1)) + ; +} + +static inline void raw_spin_unlock(raw_spinlock_t *lock) +{ + smp_store_release(&lock->count, 0); +} + +#define raw_spin_lock_irq(lock) raw_spin_lock(lock) +#define raw_spin_unlock_irq(lock) raw_spin_unlock(lock) + +#define raw_spin_lock_irqsave(lock, flags) \ +do { \ + (void) flags; \ + raw_spin_lock(lock); \ +} while (0) + +#define raw_spin_unlock_irqrestore(lock, flags) raw_spin_unlock(lock) + +typedef raw_spinlock_t spinlock_t; + +#define __SPIN_LOCK_UNLOCKED(name) __RAW_SPIN_LOCK_UNLOCKED(name) + +#define DEFINE_SPINLOCK(x) spinlock_t x = __SPIN_LOCK_UNLOCKED(x) + +#define spin_lock_init(lock) raw_spin_lock_init(lock) +#define spin_lock(lock) raw_spin_lock(lock) +#define spin_unlock(lock) raw_spin_unlock(lock) + +#define spin_lock_nested(lock, n) spin_lock(lock) + +#define spin_lock_bh(lock) raw_spin_lock(lock) +#define spin_unlock_bh(lock) raw_spin_unlock(lock) + +#define spin_lock_irq(lock) raw_spin_lock(lock) +#define spin_unlock_irq(lock) raw_spin_unlock(lock) + +#define spin_lock_irqsave(lock, flags) raw_spin_lock_irqsave(lock, flags) +#define spin_unlock_irqrestore(lock, flags) raw_spin_unlock_irqrestore(lock, flags) + +#endif /* __TOOLS_LINUX_SPINLOCK_H */ |