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| author | Kent Overstreet <kent.overstreet@linux.dev> | 2023-06-19 21:01:13 -0400 |
|---|---|---|
| committer | Kent Overstreet <kent.overstreet@linux.dev> | 2023-10-22 17:10:04 -0400 |
| commit | a5b696ee6e10103def82ea9abc18958912e81b00 (patch) | |
| tree | c8b0dadf44dd7441a92c2081b7b78202386bd3bc /fs/bcachefs/bcachefs.h | |
| parent | 6547ebabdaac4407ccc978f63f4dc4d9f8936783 (diff) | |
| download | linux-stable-a5b696ee6e10103def82ea9abc18958912e81b00.tar.gz linux-stable-a5b696ee6e10103def82ea9abc18958912e81b00.tar.bz2 linux-stable-a5b696ee6e10103def82ea9abc18958912e81b00.zip | |
bcachefs: seqmutex; fix a lockdep splat
We can't be holding btree_trans_lock while copying to user space, which
might incur a page fault. To fix this, convert it to a seqmutex so we
can unlock/relock.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Diffstat (limited to 'fs/bcachefs/bcachefs.h')
| -rw-r--r-- | fs/bcachefs/bcachefs.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/fs/bcachefs/bcachefs.h b/fs/bcachefs/bcachefs.h index 0dfa42e297e0..4199b42db640 100644 --- a/fs/bcachefs/bcachefs.h +++ b/fs/bcachefs/bcachefs.h @@ -208,6 +208,7 @@ #include "fifo.h" #include "nocow_locking_types.h" #include "opts.h" +#include "seqmutex.h" #include "util.h" #ifdef CONFIG_BCACHEFS_DEBUG @@ -779,7 +780,7 @@ struct bch_fs { } btree_write_stats[BTREE_WRITE_TYPE_NR]; /* btree_iter.c: */ - struct mutex btree_trans_lock; + struct seqmutex btree_trans_lock; struct list_head btree_trans_list; mempool_t btree_paths_pool; mempool_t btree_trans_mem_pool; |