flag parameters: check magic constants

This patch adds test that ensure the boundary conditions for the various
constants introduced in the previous patches is met.  No code is generated.

[akpm@linux-foundation.org: fix alpha]
Signed-off-by: Ulrich Drepper <drepper@redhat.com>
Acked-by: Davide Libenzi <davidel@xmailserver.org>
Cc: Michael Kerrisk <mtk.manpages@googlemail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 3 insertions, 0 deletions

diff --git a/fs/eventpoll.c b/fs/eventpoll.c
index 3fd4014f3c5a..2fdad4204044 100644
--- a/fs/eventpoll.c
+++ b/fs/eventpoll.c
@@ -1051,6 +1051,9 @@ asmlinkage long sys_epoll_create2(int size, int flags)
         int error, fd = -1;
         struct eventpoll *ep;
 
+        /* Check the EPOLL_* constant for consistency.  */
+        BUILD_BUG_ON(EPOLL_CLOEXEC != O_CLOEXEC);
+
         if (flags & ~EPOLL_CLOEXEC)
                 return -EINVAL;