diff options
| author | Kent Overstreet <kent.overstreet@linux.dev> | 2022-12-19 12:24:18 -0500 |
|---|---|---|
| committer | Kent Overstreet <kent.overstreet@linux.dev> | 2022-12-19 12:35:18 -0500 |
| commit | 7958ebe32438f58a0e59f240aa288b14efcc0964 (patch) | |
| tree | 62d3a1f306da778614c53004bda650973c364cd6 | |
| parent | 7a4d61ad5a36ae4f54c9ecc654a8930d806fa54f (diff) | |
bcachefs: Fix alloc_v4_backpointers()
BCH_ALLOC_V4_BACKPOINTERS_START() may be unset on older filesystems, and
alloc_v4_backpointers() needs to take this into account - because it
wasn't, __bch2_alloc_to_v4_mut() was zeroing out all fields, instead of
only new ones.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
| -rw-r--r-- | fs/bcachefs/alloc_background.h | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/fs/bcachefs/alloc_background.h b/fs/bcachefs/alloc_background.h index 47336e9e1018..a0c3c47b49b5 100644 --- a/fs/bcachefs/alloc_background.h +++ b/fs/bcachefs/alloc_background.h @@ -200,7 +200,9 @@ void bch2_do_invalidates(struct bch_fs *); static inline struct bch_backpointer *alloc_v4_backpointers(struct bch_alloc_v4 *a) { - return (void *) ((u64 *) &a->v + BCH_ALLOC_V4_BACKPOINTERS_START(a)); + return (void *) ((u64 *) &a->v + + (BCH_ALLOC_V4_BACKPOINTERS_START(a) ?: + BCH_ALLOC_V4_U64s_V0)); } static inline const struct bch_backpointer *alloc_v4_backpointers_c(const struct bch_alloc_v4 *a) |