fs: Make unload_nls() NULL pointer safe

Most call sites of unload_nls() do:
	if (nls)
		unload_nls(nls);

Check the pointer inside unload_nls() like we do in kfree() and
simplify the call sites.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Steve French <sfrench@us.ibm.com>
Cc: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>
Cc: Roman Zippel <zippel@linux-m68k.org>
Cc: Dave Kleikamp <shaggy@linux.vnet.ibm.com>
Cc: Petr Vandrovec <vandrove@vc.cvut.cz>
Cc: Anton Altaparmakov <aia21@cantab.net>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

1 files changed, 1 insertions, 6 deletions

diff --git a/fs/befs/linuxvfs.c b/fs/befs/linuxvfs.c
index dd376c124e71..33baf27fac78 100644
--- a/fs/befs/linuxvfs.c
+++ b/fs/befs/linuxvfs.c
@@ -737,12 +737,7 @@ befs_put_super(struct super_block *sb)
 {
         kfree(BEFS_SB(sb)->mount_opts.iocharset);
         BEFS_SB(sb)->mount_opts.iocharset = NULL;
-
-        if (BEFS_SB(sb)->nls) {
-                unload_nls(BEFS_SB(sb)->nls);
-                BEFS_SB(sb)->nls = NULL;
-        }
-
+        unload_nls(BEFS_SB(sb)->nls);
         kfree(sb->s_fs_info);
         sb->s_fs_info = NULL;
 }