flag parameters: check magic constants

[linux-2.6-omap-h63xx.git] / fs / eventpoll.c

diff --git a/fs/eventpoll.c b/fs/eventpoll.c
index 990c01d2d66bcce64a1c2a993cd6cc01ea5951d5..2fdad42040442d391b9089662c08f17cbcefa11a 100644 (file)
--- a/fs/eventpoll.c
+++ b/fs/eventpoll.c
@@ -1046,11 +1046,17 @@ retry:
  * RB tree. With the current implementation, the "size" parameter is ignored
  * (besides sanity checks).
  */
-asmlinkage long sys_epoll_create(int size)
+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;
+
        DNPRINTK(3, (KERN_INFO "[%p] eventpoll: sys_epoll_create(%d)\n",
                     current, size));
 
@@ -1068,7 +1074,8 @@ asmlinkage long sys_epoll_create(int size)
         * Creates all the items needed to setup an eventpoll file. That is,
         * a file structure and a free file descriptor.
         */
-       fd = anon_inode_getfd("[eventpoll]", &eventpoll_fops, ep);
+       fd = anon_inode_getfd("[eventpoll]", &eventpoll_fops, ep,
+                             flags & O_CLOEXEC);
        if (fd < 0)
                ep_free(ep);
 
@@ -1079,6 +1086,11 @@ error_return:
        return fd;
 }
 
+asmlinkage long sys_epoll_create(int size)
+{
+       return sys_epoll_create2(size, 0);
+}
+
 /*
  * The following function implements the controller interface for
  * the eventpoll file that enables the insertion/removal/change of