Commit 539d39eb2708 ("bcache: fix wrong return value in bch_debug_init()") returns the return value of debugfs_create_dir() to bcache_init(). When CONFIG_DEBUG_FS=n, bch_debug_init() always returns 1 and makes bcache_init() failedi.

This patch makes bch_debug_init() always returns 0 if CONFIG_DEBUG_FS=n, so bcache can continue to work for the kernels which don't have debugfs enanbled.

Fixes: Commit 539d39eb2708 ("bcache: fix wrong return value in bch_debug_init()") Cc: stable@vger.kernel.org Signed-off-by: Coly Li colyli@suse.de Reported-by: Massimo B. massimo.b@gmx.net Reported-by: Kai Krakow kai@kaishome.de Cc: Kent Overstreet kent.overstreet@gmail.com --- drivers/md/bcache/bcache.h | 5 +++++ drivers/md/bcache/debug.c | 4 ++-- 2 files changed, 7 insertions(+), 2 deletions(-)

diff --git a/drivers/md/bcache/bcache.h b/drivers/md/bcache/bcache.h index 3a0cfb237af9..5b3fe87f32ee 100644 --- a/drivers/md/bcache/bcache.h +++ b/drivers/md/bcache/bcache.h @@ -994,8 +994,13 @@ void bch_open_buckets_free(struct cache_set *);

int bch_cache_allocator_start(struct cache *ca);

+#ifdef CONFIG_DEBUG_FS void bch_debug_exit(void); int bch_debug_init(struct kobject *); +#else +static inline void bch_debug_exit(void) {}; +static inline int bch_debug_init(struct kobject *kobj) { return 0; }; +#endif void bch_request_exit(void); int bch_request_init(void);

diff --git a/drivers/md/bcache/debug.c b/drivers/md/bcache/debug.c index 4e63c6f6c04d..34a0ed4ed70c 100644 --- a/drivers/md/bcache/debug.c +++ b/drivers/md/bcache/debug.c @@ -240,8 +240,6 @@ void bch_debug_init_cache_set(struct cache_set *c) } }

-#endif - void bch_debug_exit(void) { if (!IS_ERR_OR_NULL(bcache_debug)) @@ -254,3 +252,5 @@ int __init bch_debug_init(struct kobject *kobj)

return IS_ERR_OR_NULL(bcache_debug); } + +#endif