[PATCH] futex: init error check

Check register_filesystem() and kern_mount() return values.

Cc: Ingo Molnar <mingo@redhat.com>
Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 8 insertions, 2 deletions

diff --git a/kernel/futex.c b/kernel/futex.c
index 7c0d0d4fa7f7..d60b7f7a8cc3 100644
--- a/kernel/futex.c
+++ b/kernel/futex.c
@@ -1857,10 +1857,16 @@ static struct file_system_type futex_fs_type = {
 
 static int __init init(void)
 {
-        unsigned int i;
+        int i = register_filesystem(&futex_fs_type);
+
+        if (i)
+                return i;
 
-        register_filesystem(&futex_fs_type);
         futex_mnt = kern_mount(&futex_fs_type);
+        if (IS_ERR(futex_mnt)) {
+                unregister_filesystem(&futex_fs_type);
+                return PTR_ERR(futex_mnt);
+        }
 
         for (i = 0; i < ARRAY_SIZE(futex_queues); i++) {
                 INIT_LIST_HEAD(&futex_queues[i].chain);