vfs: take O_NONBLOCK out of the O_* uniqueness test
James Bottomley [Thu, 9 Sep 2010 23:38:12 +0000 (16:38 -0700)]
O_NONBLOCK on parisc has a dual value:

#define O_NONBLOCK 000200004 /* HPUX has separate NDELAY & NONBLOCK */

It is caught by the O_* bits uniqueness check and leads to a parisc
compile error.  The fix would be to take O_NONBLOCK out.

Signed-off-by: Wu Fengguang <fengguang.wu@intel.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
Cc: Jamie Lokier <jamie@shareable.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

fs/fcntl.c

index 6769fd0..f8cc34f 100644 (file)
@@ -769,11 +769,15 @@ EXPORT_SYMBOL(kill_fasync);
 
 static int __init fcntl_init(void)
 {
-       /* please add new bits here to ensure allocation uniqueness */
-       BUILD_BUG_ON(19 - 1 /* for O_RDONLY being 0 */ != HWEIGHT32(
+       /*
+        * Please add new bits here to ensure allocation uniqueness.
+        * Exceptions: O_NONBLOCK is a two bit define on parisc; O_NDELAY
+        * is defined as O_NONBLOCK on some platforms and not on others.
+        */
+       BUILD_BUG_ON(18 - 1 /* for O_RDONLY being 0 */ != HWEIGHT32(
                O_RDONLY        | O_WRONLY      | O_RDWR        |
                O_CREAT         | O_EXCL        | O_NOCTTY      |
-               O_TRUNC         | O_APPEND      | O_NONBLOCK    |
+               O_TRUNC         | O_APPEND      | /* O_NONBLOCK | */
                __O_SYNC        | O_DSYNC       | FASYNC        |
                O_DIRECT        | O_LARGEFILE   | O_DIRECTORY   |
                O_NOFOLLOW      | O_NOATIME     | O_CLOEXEC     |