[glibc] Fix invalid use of NULL in epoll_pwait2(2) test

[glibc] Fix invalid use of NULL in epoll_pwait2(2) test

[Adhemerval Zanella]

https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=cc5372806a4bf34cb5c9038d1716b5ea6202abd0

commit cc5372806a4bf34cb5c9038d1716b5ea6202abd0
Author: Alejandro Colomar <alx.manpages@gmail.com>
Date:   Wed May 31 22:44:22 2023 +0200

    Fix invalid use of NULL in epoll_pwait2(2) test
    
    epoll_pwait2(2)'s second argument should be nonnull.  We're going to add
    __nonnull to the prototype, so let's fix the test accordingly.  We can
    use a dummy variable to avoid passing NULL.
    
    Reported-by: Adhemerval Zanella Netto <adhemerval.zanella@linaro.org>
    Signed-off-by: Alejandro Colomar <alx@kernel.org>

Diff:
---
 sysdeps/unix/sysv/linux/tst-epoll.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/sysdeps/unix/sysv/linux/tst-epoll.c b/sysdeps/unix/sysv/linux/tst-epoll.c
index 66f091c202..abda45c427 100644
--- a/sysdeps/unix/sysv/linux/tst-epoll.c
+++ b/sysdeps/unix/sysv/linux/tst-epoll.c
@@ -180,6 +180,8 @@ epoll_pwait2_check (int epfd, struct epoll_event *ev, int maxev, int tmo,
 static int
 do_test (void)
 {
+  struct epoll_event ev;
+
   {
     struct sigaction sa;
     sa.sa_handler = handler;
@@ -191,7 +193,7 @@ do_test (void)
     xsigaction (SIGCHLD, &sa, NULL);
   }
 
-  int r = epoll_pwait2 (-1, NULL, 0, NULL, NULL);
+  int r = epoll_pwait2 (-1, &ev, 0, NULL, NULL);
   TEST_COMPARE (r, -1);
   bool pwait2_supported = errno != ENOSYS;