[git commit branch/0.9.33] eventfd: Implement eventfd2 and fix eventfd

[Khem Raj]

commit: http://git.uclibc.org/uClibc/commit/?id=7810e4f8027b5c4c8ceec6fefec4eb779362ebb5
branch: http://git.uclibc.org/uClibc/commit/?id=refs/heads/0.9.33

eventfd: evntfd assumes to take two arguments instead it
should be one evntfd expects two therefore implement both syscalls with
correct parameters

Thanks Eugene Rudoy for reporting it and also providing the patch

Signed-off-by: Khem Raj <raj.khem at gmail.com>
---
 libc/sysdeps/linux/common/eventfd.c |   16 ++++++++++++++--
 libc/sysdeps/linux/common/stubs.c   |    2 +-
 2 files changed, 15 insertions(+), 3 deletions(-)

diff --git a/libc/sysdeps/linux/common/eventfd.c b/libc/sysdeps/linux/common/eventfd.c
index cc3f3f0..96597ab 100644
--- a/libc/sysdeps/linux/common/eventfd.c
+++ b/libc/sysdeps/linux/common/eventfd.c
@@ -7,12 +7,24 @@
  * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
  */
 
+#include <errno.h>
 #include <sys/syscall.h>
 #include <sys/eventfd.h>
 
 /*
  * eventfd()
  */
-#ifdef __NR_eventfd
-_syscall2(int, eventfd, int, count, int, flags)
+#if defined __NR_eventfd || defined __NR_eventfd2
+int eventfd (int count, int flags)
+{
+#if defined __NR_eventfd2
+  return INLINE_SYSCALL (eventfd2, 2, count, flags);
+#elif defined __NR_eventfd
+  if (flags != 0) {
+     __set_errno (EINVAL);
+    return -1;
+  }
+  return INLINE_SYSCALL (eventfd, 1, count);
+#endif
+}
 #endif
diff --git a/libc/sysdeps/linux/common/stubs.c b/libc/sysdeps/linux/common/stubs.c
index 4d1e26c..7af14c1 100644
--- a/libc/sysdeps/linux/common/stubs.c
+++ b/libc/sysdeps/linux/common/stubs.c
@@ -93,7 +93,7 @@ make_stub(epoll_ctl)
 make_stub(epoll_wait)
 #endif
 
-#if !defined __NR_eventfd && defined __UCLIBC_LINUX_SPECIFIC__
+#if !defined __NR_eventfd && !defined __NR_eventfd2 && defined __UCLIBC_LINUX_SPECIFIC__
 make_stub(eventfd)
 #endif