kcore: more fixes for init

proc_kcore_init() doesn't check NULL case.  fix it and remove unnecessary
comments.

Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Acked-by: WANG Cong <xiyou.wangcong@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 4 insertions, 1 deletions

diff --git a/fs/proc/kcore.c b/fs/proc/kcore.c
index c6a5ec731972..70733780fdd9 100644
--- a/fs/proc/kcore.c
+++ b/fs/proc/kcore.c
@@ -606,6 +606,10 @@ static int __init proc_kcore_init(void)
 {
         proc_root_kcore = proc_create("kcore", S_IRUSR, NULL,
                                       &proc_kcore_operations);
+        if (!proc_root_kcore) {
+                printk(KERN_ERR "couldn't create /proc/kcore\n");
+                return 0; /* Always returns 0. */
+        }
         /* Store text area if it's special */
         proc_kcore_text_init();
         /* Store vmalloc area */
@@ -615,7 +619,6 @@ static int __init proc_kcore_init(void)
         /* Store direct-map area from physical memory map */
         kcore_update_ram();
         hotplug_memory_notifier(kcore_callback, 0);
-        /* Other special area, area-for-module etc is arch specific. */
 
         return 0;
 }