From: Peter Xu peterx@redhat.com
[ Upstream commit 0ca2c535f5a07f01118a6a70bfab78576e02fcae ]
__USE_GNU should be an internal macro only used inside glibc. Either memfd_create() or fallocate() requires _GNU_SOURCE per man page, where __USE_GNU will further be defined by glibc headers include/features.h:
#ifdef _GNU_SOURCE # define __USE_GNU 1 #endif
This fixes:
hugetlb-madvise.c:20: warning: "__USE_GNU" redefined
20 | #define __USE_GNU | In file included from /usr/include/x86_64-linux-gnu/bits/libc-header-start.h:33, from /usr/include/stdlib.h:26, from hugetlb-madvise.c:16: /usr/include/features.h:407: note: this is the location of the previous definition 407 | # define __USE_GNU 1 |
Link: https://lkml.kernel.org/r/Y8V9z+z6Tk7NetI3@x1n Signed-off-by: Peter Xu peterx@redhat.com Reported-by: kernel test robot lkp@intel.com Cc: Mike Kravetz mike.kravetz@oracle.com Signed-off-by: Andrew Morton akpm@linux-foundation.org Signed-off-by: Sasha Levin sashal@kernel.org --- tools/testing/selftests/vm/hugetlb-madvise.c | 1 - 1 file changed, 1 deletion(-)
diff --git a/tools/testing/selftests/vm/hugetlb-madvise.c b/tools/testing/selftests/vm/hugetlb-madvise.c index 3c9943131881..b3f01f1f7a60 100644 --- a/tools/testing/selftests/vm/hugetlb-madvise.c +++ b/tools/testing/selftests/vm/hugetlb-madvise.c @@ -16,7 +16,6 @@ #include <stdio.h> #include <unistd.h> #include <sys/mman.h> -#define __USE_GNU #include <fcntl.h>
#define USAGE "USAGE: %s <hugepagefile_name>\n"