ocfs2: further debugfs cleanups

There is no need to check return value of debugfs_create functions, but
the last sweep through ocfs missed a number of places where this was
happening.  There is also no need to save the individual dentries for the
debugfs files, as everything is can just be removed at once when the
directory is removed.

By getting rid of the file dentries for the debugfs entries, a bit of
local memory can be saved as well.

[colin.king@canonical.com: ensure ret is set to zero before returning]
  Link: http://lkml.kernel.org/r/20190807121929.28918-1-colin.king@canonical.com
Link: http://lkml.kernel.org/r/20190731132119.GA12603@kroah.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Reviewed-by: Joseph Qi <joseph.qi@linux.alibaba.com>
Cc: Mark Fasheh <mark@fasheh.com>
Cc: Joel Becker <jlbec@evilplan.org>
Cc: Jia Guo <guojia12@huawei.com>
Cc: Junxiao Bi <junxiao.bi@oracle.com>
Cc: Changwei Ge <gechangwei@live.cn>
Cc: Gang He <ghe@suse.com>
Cc: Jun Piao <piaojun@huawei.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 11 insertions, 15 deletions

diff --git a/fs/ocfs2/blockcheck.c b/fs/ocfs2/blockcheck.c
index 429e6a8359a5..eaf042feaf5e 100644
--- a/fs/ocfs2/blockcheck.c
+++ b/fs/ocfs2/blockcheck.c
@@ -231,14 +231,6 @@ static int blockcheck_u64_get(void *data, u64 *val)
 }
 DEFINE_SIMPLE_ATTRIBUTE(blockcheck_fops, blockcheck_u64_get, NULL, "%llu\n");
 
-static struct dentry *blockcheck_debugfs_create(const char *name,
-						struct dentry *parent,
-						u64 *value)
-{
-	return debugfs_create_file(name, S_IFREG | S_IRUSR, parent, value,
-				   &blockcheck_fops);
-}
-
 static void ocfs2_blockcheck_debug_remove(struct ocfs2_blockcheck_stats *stats)
 {
 	if (stats) {
@@ -250,16 +242,20 @@ static void ocfs2_blockcheck_debug_remove(struct ocfs2_blockcheck_stats *stats)
 static void ocfs2_blockcheck_debug_install(struct ocfs2_blockcheck_stats *stats,
 					   struct dentry *parent)
 {
-	stats->b_debug_dir = debugfs_create_dir("blockcheck", parent);
+	struct dentry *dir;
+
+	dir = debugfs_create_dir("blockcheck", parent);
+	stats->b_debug_dir = dir;
+
+	debugfs_create_file("blocks_checked", S_IFREG | S_IRUSR, dir,
+			    &stats->b_check_count, &blockcheck_fops);
 
-	blockcheck_debugfs_create("blocks_checked", stats->b_debug_dir,
-				  &stats->b_check_count);
+	debugfs_create_file("checksums_failed", S_IFREG | S_IRUSR, dir,
+			    &stats->b_failure_count, &blockcheck_fops);
 
-	blockcheck_debugfs_create("checksums_failed", stats->b_debug_dir,
-				  &stats->b_failure_count);
+	debugfs_create_file("ecc_recoveries", S_IFREG | S_IRUSR, dir,
+			    &stats->b_recover_count, &blockcheck_fops);
 
-	blockcheck_debugfs_create("ecc_recoveries", stats->b_debug_dir,
-				  &stats->b_recover_count);
 }
 #else
 static inline void ocfs2_blockcheck_debug_install(struct ocfs2_blockcheck_stats *stats,