From: Alexey Dobriyan <adobriyan@gmail.com>

Everyone passes valid pointer there.

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
---

 fs/filesystems.c |    2 --
 1 file changed, 2 deletions(-)

diff -puN fs/filesystems.c~ban-register_filesystemnull fs/filesystems.c
--- a/fs/filesystems.c~ban-register_filesystemnull
+++ a/fs/filesystems.c
@@ -69,8 +69,6 @@ int register_filesystem(struct file_syst
 	int res = 0;
 	struct file_system_type ** p;
 
-	if (!fs)
-		return -EINVAL;
 	if (fs->next)
 		return -EBUSY;
 	INIT_LIST_HEAD(&fs->fs_supers);
_