-static void __pagecache_lock_put(struct pagecache_lock *lock, long i)
-{
- BUG_ON(atomic_long_read(&lock->v) == 0);
-
- if (atomic_long_sub_return_release(i, &lock->v) == 0)
- wake_up_all(&lock->wait);
-}
-
-static bool __pagecache_lock_tryget(struct pagecache_lock *lock, long i)
-{
- long v = atomic_long_read(&lock->v), old;
-
- do {
- old = v;
-
- if (i > 0 ? v < 0 : v > 0)
- return false;
- } while ((v = atomic_long_cmpxchg_acquire(&lock->v,
- old, old + i)) != old);
- return true;
-}
-
-static void __pagecache_lock_get(struct pagecache_lock *lock, long i)
-{
- wait_event(lock->wait, __pagecache_lock_tryget(lock, i));
-}
-
-void bch2_pagecache_add_put(struct pagecache_lock *lock)
-{
- __pagecache_lock_put(lock, 1);
-}
-
-bool bch2_pagecache_add_tryget(struct pagecache_lock *lock)
-{
- return __pagecache_lock_tryget(lock, 1);
-}
-
-void bch2_pagecache_add_get(struct pagecache_lock *lock)
-{
- __pagecache_lock_get(lock, 1);
-}
-
-void bch2_pagecache_block_put(struct pagecache_lock *lock)
-{
- __pagecache_lock_put(lock, -1);
-}
-
-void bch2_pagecache_block_get(struct pagecache_lock *lock)
-{
- __pagecache_lock_get(lock, -1);
-}
-