[PATCH] fs: Use ARRAY_SIZE macro

Use ARRAY_SIZE macro instead of sizeof(x)/sizeof(x[0]) and remove a
duplicate of ARRAY_SIZE.  Some trailing whitespaces are also deleted.

Signed-off-by: Tobias Klauser <tklauser@nuerscht.ch>
Cc: David Howells <dhowells@redhat.com>
Cc: Dave Kleikamp <shaggy@austin.ibm.com>
Acked-by: Trond Myklebust <trond.myklebust@fys.uio.no>
Cc: Neil Brown <neilb@cse.unsw.edu.au>
Cc: Chris Mason <mason@suse.com>
Cc: Jeff Mahoney <jeffm@suse.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Nathan Scott <nathans@sgi.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/fs/nfsctl.c b/fs/nfsctl.c
index 1c72c7f..a5a18d4 100644
--- a/fs/nfsctl.c
+++ b/fs/nfsctl.c
@@ -101,7 +101,7 @@
 	if (version != NFSCTL_VERSION)
 		return -EINVAL;
 
-	if (cmd < 0 || cmd >= sizeof(map)/sizeof(map[0]) || !map[cmd].name)
+	if (cmd < 0 || cmd >= ARRAY_SIZE(map) || !map[cmd].name)
 		return -EINVAL;
 
 	file = do_open(map[cmd].name, map[cmd].rsize ? O_RDWR : O_WRONLY);