diff options
author | Kent Overstreet <kent.overstreet@linux.dev> | 2022-11-26 17:09:59 -0500 |
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committer | Kent Overstreet <kent.overstreet@linux.dev> | 2022-11-26 17:09:59 -0500 |
commit | 934a84dfaf719af82dadbbe0e2480baff03c905b (patch) | |
tree | 22deb77e752f90c842ac2f8dce91f5a602afd49d /libbcachefs/two_state_shared_lock.c | |
parent | 48eefee7495c6e145f3fcfe6ab83f9e8bc27a1ec (diff) |
Update bcachefs sources to 5963d1b1a4 bcacehfs: Fix bch2_get_alloc_in_memory_pos()
Diffstat (limited to 'libbcachefs/two_state_shared_lock.c')
-rw-r--r-- | libbcachefs/two_state_shared_lock.c | 29 |
1 files changed, 2 insertions, 27 deletions
diff --git a/libbcachefs/two_state_shared_lock.c b/libbcachefs/two_state_shared_lock.c index dc508d54..9764c2e6 100644 --- a/libbcachefs/two_state_shared_lock.c +++ b/libbcachefs/two_state_shared_lock.c @@ -2,32 +2,7 @@ #include "two_state_shared_lock.h" -void bch2_two_state_unlock(two_state_lock_t *lock, int s) +void __bch2_two_state_lock(two_state_lock_t *lock, int s) { - long i = s ? 1 : -1; - - BUG_ON(atomic_long_read(&lock->v) == 0); - - if (atomic_long_sub_return_release(i, &lock->v) == 0) - wake_up_all(&lock->wait); -} - -bool bch2_two_state_trylock(two_state_lock_t *lock, int s) -{ - long i = s ? 1 : -1; - 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; -} - -void bch2_two_state_lock(two_state_lock_t *lock, int s) -{ - wait_event(lock->wait, bch2_two_state_trylock(lock, s)); + __wait_event(lock->wait, bch2_two_state_trylock(lock, s)); } |