With newer compilers the pid_max test is failing to build with the following build error:
... pid_max.c: In function ‘pid_max_cb’: pid_max.c:42:15: error: implicit declaration of function ‘mount’ [-Wimplicit-function-declaration] 42 | ret = mount("", "/", NULL, MS_PRIVATE | MS_REC, 0); | ^~~~~ pid_max.c:42:36: error: ‘MS_PRIVATE’ undeclared (first use in this function); did you mean ‘MAP_PRIVATE’? 42 | ret = mount("", "/", NULL, MS_PRIVATE | MS_REC, 0); | ^~~~~~~~~~ | MAP_PRIVATE pid_max.c:42:36: note: each undeclared identifier is reported only once for each function it appears in ...
The fix seems to be including sys/mount.h which brings in the missing defines and missing definition mount function.
Signed-off-by: Brahmajit Das listout@listout.xyz --- tools/testing/selftests/pid_namespace/pid_max.c | 1 + 1 file changed, 1 insertion(+)
diff --git a/tools/testing/selftests/pid_namespace/pid_max.c b/tools/testing/selftests/pid_namespace/pid_max.c index 51c414faabb0..96f274f0582b 100644 --- a/tools/testing/selftests/pid_namespace/pid_max.c +++ b/tools/testing/selftests/pid_namespace/pid_max.c @@ -10,6 +10,7 @@ #include <stdlib.h> #include <string.h> #include <syscall.h> +#include <sys/mount.h> #include <sys/wait.h>
#include "../kselftest_harness.h"