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btrfs: use the right number of levels for lockdep keysets 

BTRFS_MAX_LEVEL is 8 and the keyset table is supposed to have a key for
each level, but we'll never have more than 8 levels.  The values passed
to btrfs_set_buffer_lockdep_class are always derived from a valid extent
buffer.  Set the array sizes to the right value.

Reviewed-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
David Sterba 2020-10-27 15:54:08 +01:00
parent ecfdc08b8c
commit 387824afd7
1 changed files with 2 additions and 2 deletions
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4
fs/btrfs/disk-io.c
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@ -153,8 +153,8 @@ struct async_submit_bio {
static struct btrfs_lockdep_keyset {
u64 id; /* root objectid */
const char *name_stem; /* lock name stem */
char names[BTRFS_MAX_LEVEL + 1][20];
struct lock_class_key keys[BTRFS_MAX_LEVEL + 1];
char names[BTRFS_MAX_LEVEL][20];
struct lock_class_key keys[BTRFS_MAX_LEVEL];
} btrfs_lockdep_keysets[] = {
{ .id = BTRFS_ROOT_TREE_OBJECTID, .name_stem = "root" },
{ .id = BTRFS_EXTENT_TREE_OBJECTID, .name_stem = "extent" },