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| author | Coly Li <colyli@suse.de> | 2018-05-17 23:33:26 +0800 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2018-05-17 09:43:40 -0600 |
| commit | 1c1a2ee1b53b006754073eefc65d2b2cedb5264b (patch) | |
| tree | 4a2b82959256114041c471c0b2dc453740d5aca9 | |
| parent | 9abd68ef454c824bfd18629033367b4382b5f390 (diff) | |
| download | linux-1c1a2ee1b53b006754073eefc65d2b2cedb5264b.tar.bz2 | |
bcache: return 0 from bch_debug_init() if CONFIG_DEBUG_FS=n
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.
Changelog:
v4: Add Acked-by from Kent Overstreet.
v3: Use IS_ENABLED(CONFIG_DEBUG_FS) to replace #ifdef DEBUG_FS.
v2: Remove a warning information
v1: Initial version.
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>
Tested-by: Kai Krakow <kai@kaishome.de>
Acked-by: Kent Overstreet <kent.overstreet@gmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
| -rw-r--r-- | drivers/md/bcache/debug.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/md/bcache/debug.c b/drivers/md/bcache/debug.c index 4e63c6f6c04d..d030ce3025a6 100644 --- a/drivers/md/bcache/debug.c +++ b/drivers/md/bcache/debug.c @@ -250,7 +250,9 @@ void bch_debug_exit(void) int __init bch_debug_init(struct kobject *kobj) { - bcache_debug = debugfs_create_dir("bcache", NULL); + if (!IS_ENABLED(CONFIG_DEBUG_FS)) + return 0; + bcache_debug = debugfs_create_dir("bcache", NULL); return IS_ERR_OR_NULL(bcache_debug); } |