[PATCH v2 19/46] epoll: Use epoll_pwait if arch does not have the epoll_wait syscall

[Markos Chandras]

From: Markos Chandras <markos.chandras at imgtec.com>

Signed-off-by: Markos Chandras <markos.chandras at imgtec.com>
---
 libc/sysdeps/linux/common/epoll.c | 10 ++++++++++
 libc/sysdeps/linux/common/stubs.c |  2 +-
 2 files changed, 11 insertions(+), 1 deletion(-)

diff --git a/libc/sysdeps/linux/common/epoll.c b/libc/sysdeps/linux/common/epoll.c
index f07ab94..3278f9d 100644
--- a/libc/sysdeps/linux/common/epoll.c
+++ b/libc/sysdeps/linux/common/epoll.c
@@ -87,5 +87,15 @@ int __libc_epoll_pwait(int epfd, struct epoll_event *events, int maxevents,
 	}
 # endif
 }
+/*
+ * If epoll_wait is not defined, then call epoll_pwait instead using NULL
+ * for sigmask argument
+ */
+#if !defined(__NR_epoll_wait)
+int epoll_wait(int epfd, struct epoll_event *events, int maxevents, int timeout)
+{
+	return INLINE_SYSCALL(epoll_pwait, 5, epfd, events, maxevents, timeout, NULL);
+}
+#endif
 weak_alias(__libc_epoll_pwait, epoll_pwait)
 #endif
diff --git a/libc/sysdeps/linux/common/stubs.c b/libc/sysdeps/linux/common/stubs.c
index 3b6df48..e96e458 100644
--- a/libc/sysdeps/linux/common/stubs.c
+++ b/libc/sysdeps/linux/common/stubs.c
@@ -89,7 +89,7 @@ make_stub(epoll_create)
 make_stub(epoll_ctl)
 #endif
 
-#ifndef __NR_epoll_wait
+#if !defined(__NR_epoll_wait) && !defined(__NR_epoll_pwait)
 make_stub(epoll_wait)
 #endif
 
-- 
1.8.0