diff options
Diffstat (limited to 'libbcachefs/btree_locking.h')
| -rw-r--r-- | libbcachefs/btree_locking.h | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/libbcachefs/btree_locking.h b/libbcachefs/btree_locking.h index 2530fdb2..b9fd14e3 100644 --- a/libbcachefs/btree_locking.h +++ b/libbcachefs/btree_locking.h @@ -13,6 +13,8 @@ #include "btree_iter.h" #include "six.h" +#include <linux/sched/mm.h> + void bch2_btree_lock_init(struct btree_bkey_cached_common *, enum six_lock_init_flags); #ifdef CONFIG_LOCKDEP @@ -194,6 +196,30 @@ int bch2_six_check_for_deadlock(struct six_lock *lock, void *p); /* lock: */ +static inline void trans_set_locked(struct btree_trans *trans) +{ + if (!trans->locked) { + lock_acquire_exclusive(&trans->dep_map, 0, 0, NULL, _THIS_IP_); + trans->locked = true; + trans->last_unlock_ip = 0; + + trans->pf_memalloc_nofs = (current->flags & PF_MEMALLOC_NOFS) != 0; + current->flags |= PF_MEMALLOC_NOFS; + } +} + +static inline void trans_set_unlocked(struct btree_trans *trans) +{ + if (trans->locked) { + lock_release(&trans->dep_map, _THIS_IP_); + trans->locked = false; + trans->last_unlock_ip = _RET_IP_; + + if (!trans->pf_memalloc_nofs) + current->flags &= ~PF_MEMALLOC_NOFS; + } +} + static inline int __btree_node_lock_nopath(struct btree_trans *trans, struct btree_bkey_cached_common *b, enum six_lock_type type, |