From b705b53edd1b1e166391861cf9a0460b11a188a6 Mon Sep 17 00:00:00 2001
From: Ben Noordhuis <info@bnoordhuis.nl>
Date: Tue, 25 Nov 2014 01:48:56 +0100
Subject: [PATCH] linux: fix sigmask size arg in epoll_pwait() call

sizeof(sigset_t) = 128 whereas the kernel expects 8, the size of a long.

It made the system call fail with EINVAL when a non-NULL sigset was
passed in.  Fortunately, it's academic because there is just one call
site and it passes in NULL.

Fixes libuv/libuv#4.
---
 src/unix/linux-syscalls.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/unix/linux-syscalls.c b/src/unix/linux-syscalls.c
index 06cc5943..c9945438 100644
--- a/src/unix/linux-syscalls.c
+++ b/src/unix/linux-syscalls.c
@@ -21,6 +21,7 @@
 
 #include "linux-syscalls.h"
 #include <unistd.h>
+#include <signal.h>
 #include <sys/syscall.h>
 #include <sys/types.h>
 #include <errno.h>
@@ -298,7 +299,7 @@ int uv__epoll_pwait(int epfd,
                  nevents,
                  timeout,
                  sigmask,
-                 sizeof(*sigmask));
+                 _NSIG / 8);
 #else
   return errno = ENOSYS, -1;
 #endif