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authorDavid Sterba <dsterba@suse.com>2019-03-27 16:19:55 +0100
committerDavid Sterba <dsterba@suse.com>2019-09-09 14:59:00 +0200
commit73e82fe4099bbf3e06a351430bd4ed9703212dda (patch)
treebd3545f712918d0e1382c66aaf14a2066a8d6c49 /fs
parentd23ea3fa7dcb0d4a2c405de0879bc4ddcf521d7d (diff)
downloadlinux-73e82fe4099bbf3e06a351430bd4ed9703212dda.tar.bz2
btrfs: assert tree mod log lock in __tree_mod_log_insert
The tree is going to be modified so it must be the exclusive lock. Reviewed-by: Nikolay Borisov <nborisov@suse.com> Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to 'fs')
-rw-r--r--fs/btrfs/ctree.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/fs/btrfs/ctree.c b/fs/btrfs/ctree.c
index 5df76c17775a..9d1d0a926cb0 100644
--- a/fs/btrfs/ctree.c
+++ b/fs/btrfs/ctree.c
@@ -376,8 +376,6 @@ void btrfs_put_tree_mod_seq(struct btrfs_fs_info *fs_info,
* The 'start address' is the logical address of the *new* root node
* for root replace operations, or the logical address of the affected
* block for all other operations.
- *
- * Note: must be called with write lock for fs_info::tree_mod_log_lock.
*/
static noinline int
__tree_mod_log_insert(struct btrfs_fs_info *fs_info, struct tree_mod_elem *tm)
@@ -387,6 +385,8 @@ __tree_mod_log_insert(struct btrfs_fs_info *fs_info, struct tree_mod_elem *tm)
struct rb_node *parent = NULL;
struct tree_mod_elem *cur;
+ lockdep_assert_held_write(&fs_info->tree_mod_log_lock);
+
tm->seq = btrfs_inc_tree_mod_seq(fs_info);
tm_root = &fs_info->tree_mod_log;