bcachefs: Check gfp_flags correctly in bch2_btree_cache_scan()

bch2_btree_node_mem_alloc() uses memalloc_nofs_save()/GFP_NOFS, but
GFP_NOFS does include __GFP_IO - oops. We used to use GFP_NOIO, but as
we're a filesystem now GFP_NOFS makes more sense now and is looser.

Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>

diff --git a/fs/bcachefs/btree_cache.c b/fs/bcachefs/btree_cache.c
index fa55bab..541a02f 100644 (file)
--- a/fs/bcachefs/btree_cache.c
+++ b/fs/bcachefs/btree_cache.c
@@ -242,7 +242,7 @@ static unsigned long bch2_btree_cache_scan(struct shrinker *shrink,
                return SHRINK_STOP;
 
        /* Return -1 if we can't do anything right now */
-       if (sc->gfp_mask & __GFP_IO)
+       if (sc->gfp_mask & __GFP_FS)
                mutex_lock(&bc->lock);
        else if (!mutex_trylock(&bc->lock))
                return -1;