fs: point out any processes using O_PONIES

From: Josef 'Jeff' Sipek <jeffpc@josefsipek.net>

Signed-off-by: Josef 'Jeff' Sipek <jeffpc@josefsipek.net>

diff --git a/fs/open.c b/fs/open.c
index a3a78ce..e162a6e 100644
--- a/fs/open.c
+++ b/fs/open.c
@@ -1039,6 +1039,9 @@ long do_sys_open(int dfd, const char __user *filename, int flags, int mode)
 			} else {
 				fsnotify_open(f->f_path.dentry);
 				fd_install(fd, f);
+				if (flags & O_PONIES)
+					printk(KERN_WARNING "'%s' uses O_PONIES\n",
+					       current->comm);
 			}
 		}
 		putname(tmp);
diff --git a/include/asm-generic/fcntl.h b/include/asm-generic/fcntl.h
index b847741..9648af4 100644
--- a/include/asm-generic/fcntl.h
+++ b/include/asm-generic/fcntl.h
@@ -51,6 +51,9 @@
 #ifndef O_CLOEXEC
 #define O_CLOEXEC	02000000	/* set close_on_exec */
 #endif
+#ifndef O_PONIES
+#define O_PONIES	04000000	/* unreasonable fs assumptions */
+#endif
 #ifndef O_NDELAY
 #define O_NDELAY	O_NONBLOCK
 #endif