2 files changed, 4 insertions, 3 deletions

diff --git a/fs/signalfd.c b/fs/signalfd.c
index c8609fa51a13..5441a4bca772 100644
--- a/fs/signalfd.c
+++ b/fs/signalfd.c
@@ -211,7 +211,7 @@ asmlinkage long sys_signalfd4(int ufd, sigset_t __user *user_mask,
         sigset_t sigmask;
         struct signalfd_ctx *ctx;
 
-        if (flags & ~SFD_CLOEXEC)
+        if (flags & ~(SFD_CLOEXEC | SFD_NONBLOCK))
                 return -EINVAL;
 
         if (sizemask != sizeof(sigset_t) ||
@@ -232,7 +232,7 @@ asmlinkage long sys_signalfd4(int ufd, sigset_t __user *user_mask,
                  * anon_inode_getfd() will install the fd.
                  */
                 ufd = anon_inode_getfd("[signalfd]", &signalfd_fops, ctx,
-                                       flags & O_CLOEXEC);
+                                       flags & (O_CLOEXEC | O_NONBLOCK));
                 if (ufd < 0)
                         kfree(ctx);
         } else {
diff --git a/include/linux/signalfd.h b/include/linux/signalfd.h
index 8b3f7b7420a1..bef0c46d4713 100644
--- a/include/linux/signalfd.h
+++ b/include/linux/signalfd.h
@@ -8,11 +8,12 @@
 #ifndef _LINUX_SIGNALFD_H
 #define _LINUX_SIGNALFD_H
 
-/* For O_CLOEXEC */
+/* For O_CLOEXEC and O_NONBLOCK */
 #include <linux/fcntl.h>
 
 /* Flags for signalfd4.  */
 #define SFD_CLOEXEC O_CLOEXEC
+#define SFD_NONBLOCK O_NONBLOCK
 
 struct signalfd_siginfo {
         __u32 ssi_signo;