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bcache: return 0 from bch_debug_init() if CONFIG_DEBUG_FS=n

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Commit 539d39eb27 ("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 539d39eb27 ("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>
This commit is contained in:
Coly Li 2018-05-17 23:33:26 +08:00 committed by Jens Axboe
parent 9abd68ef45
commit 1c1a2ee1b5
1 changed files with 3 additions and 1 deletions
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4
drivers/md/bcache/debug.c
View File

@ -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);
}