diff options
Diffstat (limited to 'fs/btrfs/tree-log.c')
| -rw-r--r-- | fs/btrfs/tree-log.c | 22 |
1 files changed, 16 insertions, 6 deletions
diff --git a/fs/btrfs/tree-log.c b/fs/btrfs/tree-log.c index 6f8af2de5..323e12cc9 100644 --- a/fs/btrfs/tree-log.c +++ b/fs/btrfs/tree-log.c @@ -229,7 +229,9 @@ int btrfs_pin_log_trans(struct btrfs_root *root) void btrfs_end_log_trans(struct btrfs_root *root) { if (atomic_dec_and_test(&root->log_writers)) { - smp_mb(); + /* + * Implicit memory barrier after atomic_dec_and_test + */ if (waitqueue_active(&root->log_writer_wait)) wake_up(&root->log_writer_wait); } @@ -2820,7 +2822,9 @@ int btrfs_sync_log(struct btrfs_trans_handle *trans, mutex_lock(&log_root_tree->log_mutex); if (atomic_dec_and_test(&log_root_tree->log_writers)) { - smp_mb(); + /* + * Implicit memory barrier after atomic_dec_and_test + */ if (waitqueue_active(&log_root_tree->log_writer_wait)) wake_up(&log_root_tree->log_writer_wait); } @@ -2950,6 +2954,9 @@ out_wake_log_root: atomic_set(&log_root_tree->log_commit[index2], 0); mutex_unlock(&log_root_tree->log_mutex); + /* + * The barrier before waitqueue_active is implied by mutex_unlock + */ if (waitqueue_active(&log_root_tree->log_commit_wait[index2])) wake_up(&log_root_tree->log_commit_wait[index2]); out: @@ -2961,6 +2968,9 @@ out: atomic_set(&root->log_commit[index1], 0); mutex_unlock(&root->log_mutex); + /* + * The barrier before waitqueue_active is implied by mutex_unlock + */ if (waitqueue_active(&root->log_commit_wait[index1])) wake_up(&root->log_commit_wait[index1]); return ret; @@ -5314,7 +5324,7 @@ int btrfs_recover_log_trees(struct btrfs_root *log_root_tree) ret = walk_log_tree(trans, log_root_tree, &wc); if (ret) { - btrfs_error(fs_info, ret, "Failed to pin buffers while " + btrfs_std_error(fs_info, ret, "Failed to pin buffers while " "recovering log root tree."); goto error; } @@ -5328,7 +5338,7 @@ again: ret = btrfs_search_slot(NULL, log_root_tree, &key, path, 0, 0); if (ret < 0) { - btrfs_error(fs_info, ret, + btrfs_std_error(fs_info, ret, "Couldn't find tree log root."); goto error; } @@ -5346,7 +5356,7 @@ again: log = btrfs_read_fs_root(log_root_tree, &found_key); if (IS_ERR(log)) { ret = PTR_ERR(log); - btrfs_error(fs_info, ret, + btrfs_std_error(fs_info, ret, "Couldn't read tree log root."); goto error; } @@ -5361,7 +5371,7 @@ again: free_extent_buffer(log->node); free_extent_buffer(log->commit_root); kfree(log); - btrfs_error(fs_info, ret, "Couldn't read target root " + btrfs_std_error(fs_info, ret, "Couldn't read target root " "for tree log recovery."); goto error; } |