[PATCH] fs: proc: check status of register_filesystem

[Kangjie Lu]

register_filesystem() could fail. The fix issues an error message if it
fails.

Signed-off-by: Kangjie Lu <k...@umn.edu>
---
 fs/proc/root.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/fs/proc/root.c b/fs/proc/root.c
index f4b1a9d2eca6..7dcd947cba23 100644
--- a/fs/proc/root.c
+++ b/fs/proc/root.c
@@ -141,7 +141,8 @@ void __init proc_root_init(void)
        proc_mkdir("bus", NULL);
        proc_sys_init();
 
-       register_filesystem(&proc_fs_type);
+       if (register_filesystem(&proc_fs_type))
+               pr_err("failed to register the filesystem.\n");
 }
 
 static int proc_root_getattr(const struct path *path, struct kstat *stat,
-- 
2.17.2 (Apple Git-113)