[PATCH] vfs: use kstrdup() and check failing allocation

- use kstrdup() instead of kmalloc() + memcpy()
- return NULL if allocating ->mnt_devname failed
- mnt_devname should be const

Signed-off-by: Li Zefan <lizf@cn.fujitsu.com>
Acked-by: Cyrill Gorcunov <gorcunov@gmail.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

1 files changed, 1 insertions, 1 deletions

diff --git a/include/linux/mount.h b/include/linux/mount.h
index 4374d1adeb4b..b5efaa2132ab 100644
--- a/include/linux/mount.h
+++ b/include/linux/mount.h
@@ -47,7 +47,7 @@ struct vfsmount {
         struct list_head mnt_child;     /* and going through their mnt_child */
         int mnt_flags;
         /* 4 bytes hole on 64bits arches */
-        char *mnt_devname;              /* Name of device e.g. /dev/dsk/hda1 */
+        const char *mnt_devname;        /* Name of device e.g. /dev/dsk/hda1 */
         struct list_head mnt_list;
         struct list_head mnt_expire;    /* link in fs-specific expiry list */
         struct list_head mnt_share;     /* circular list of shared mounts */