Building coredump selftests fails on x86 due to following issues:

1./usr/include/x86_64-linux-gnu/sys/mount.h:35:3: error: expected identifier before numeric constant 35 | MS_RDONLY = 1, /* Mount read-only. */ |

<linux/fs.h> pulls in kernel-internal headers that conflict with glibc's <sys/mount.h>, causing this error.

2.stackdump_test.c:25:1: note: ‘offsetof’ is defined in header ‘<stddef.h>’; did you forget to ‘#include <stddef.h>’?

Missing <stddef.h> causes unresolved use of offsetof().

Fix this by: - dropping <linux/fs.h> and including <sys/mount.h> - including <stddef.h> for offsetof()

Signed-off-by: Sahil Chandna chandna.sahil@gmail.com --- tools/testing/selftests/coredump/stackdump_test.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/tools/testing/selftests/coredump/stackdump_test.c b/tools/testing/selftests/coredump/stackdump_test.c index a4ac80bb1003..881565d28fa9 100644 --- a/tools/testing/selftests/coredump/stackdump_test.c +++ b/tools/testing/selftests/coredump/stackdump_test.c @@ -6,7 +6,7 @@ #include <libgen.h> #include <limits.h> #include <linux/coredump.h> -#include <linux/fs.h> +#include <sys/mount.h> #include <linux/limits.h> #include <pthread.h> #include <string.h> @@ -18,6 +18,7 @@ #include <sys/socket.h> #include <sys/un.h> #include <unistd.h> +#include <stddef.h>

#include "../kselftest_harness.h" #include "../filesystems/wrappers.h"