[patch 6/8] kselftest/vm: fix tests build with old libc

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From: Chengming Zhou <zhouchengming@xxxxxxxxxxxxx>
Subject: kselftest/vm: fix tests build with old libc

The error message when I build vm tests on debian10 (GLIBC 2.28):

userfaultfd.c: In function `userfaultfd_pagemap_test':
userfaultfd.c:1393:37: error: `MADV_PAGEOUT' undeclared (first use
in this function); did you mean `MADV_RANDOM'?
  if (madvise(area_dst, test_pgsize, MADV_PAGEOUT))
                                     ^~~~~~~~~~~~
                                     MADV_RANDOM

This patch includes these newer definitions from UAPI linux/mman.h, is
useful to fix tests build on systems without these definitions in glibc
sys/mman.h.

Link: https://lkml.kernel.org/r/20220227055330.43087-2-zhouchengming@xxxxxxxxxxxxx
Signed-off-by: Chengming Zhou <zhouchengming@xxxxxxxxxxxxx>
Reviewed-by: Shuah Khan <skhan@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---

 tools/testing/selftests/vm/userfaultfd.c |    1 +
 1 file changed, 1 insertion(+)

--- a/tools/testing/selftests/vm/userfaultfd.c~kselftest-vm-fix-tests-build-with-old-libc
+++ a/tools/testing/selftests/vm/userfaultfd.c
@@ -46,6 +46,7 @@
 #include <signal.h>
 #include <poll.h>
 #include <string.h>
+#include <linux/mman.h>
 #include <sys/mman.h>
 #include <sys/syscall.h>
 #include <sys/ioctl.h>
_



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