path: root/mm/backing-dev.c
diff options
authorGreg Kroah-Hartman <gregkh@linuxfoundation.org>2019-01-22 16:21:07 +0100
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2019-06-03 15:49:07 +0200
commit2d146b924ec3c0873f06308d149684dc1105d9a3 (patch)
treef5848a499b5aaa75f58232e34141bc978d44c3ee /mm/backing-dev.c
parentmm: cleancache: no need to check return value of debugfs_create functions (diff)
backing-dev: no need to check return value of debugfs_create functions
When calling debugfs functions, there is no need to ever check the return value. The function can work or not, but the code logic should never do something different based on this. And as the return value does not matter at all, no need to save the dentry in struct backing_dev_info, so delete it. Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Anders Roxell <anders.roxell@linaro.org> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Michal Hocko <mhocko@suse.com> Cc: linux-mm@kvack.org Reviewed-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to '')
1 files changed, 5 insertions, 19 deletions
diff --git a/mm/backing-dev.c b/mm/backing-dev.c
index 909dae445ea7..e8e89158adec 100644
--- a/mm/backing-dev.c
+++ b/mm/backing-dev.c
@@ -103,39 +103,25 @@ static int bdi_debug_stats_show(struct seq_file *m, void *v)
-static int bdi_debug_register(struct backing_dev_info *bdi, const char *name)
+static void bdi_debug_register(struct backing_dev_info *bdi, const char *name)
- if (!bdi_debug_root)
- return -ENOMEM;
bdi->debug_dir = debugfs_create_dir(name, bdi_debug_root);
- if (!bdi->debug_dir)
- return -ENOMEM;
- bdi->debug_stats = debugfs_create_file("stats", 0444, bdi->debug_dir,
- bdi, &bdi_debug_stats_fops);
- if (!bdi->debug_stats) {
- debugfs_remove(bdi->debug_dir);
- bdi->debug_dir = NULL;
- return -ENOMEM;
- }
- return 0;
+ debugfs_create_file("stats", 0444, bdi->debug_dir, bdi,
+ &bdi_debug_stats_fops);
static void bdi_debug_unregister(struct backing_dev_info *bdi)
- debugfs_remove(bdi->debug_stats);
- debugfs_remove(bdi->debug_dir);
+ debugfs_remove_recursive(bdi->debug_dir);
static inline void bdi_debug_init(void)
-static inline int bdi_debug_register(struct backing_dev_info *bdi,
+static inline void bdi_debug_register(struct backing_dev_info *bdi,
const char *name)
- return 0;
static inline void bdi_debug_unregister(struct backing_dev_info *bdi)