When using 'make LLVM=1 W=1 -C tools/testing/selftests/pid_namespace' with clang-20, I've noticed the following:
pid_max.c:42:8: error: call to undeclared function 'mount'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration] 42 | ret = mount("", "/", NULL, MS_PRIVATE | MS_REC, 0); | ^ pid_max.c:42:29: error: use of undeclared identifier 'MS_PRIVATE' 42 | ret = mount("", "/", NULL, MS_PRIVATE | MS_REC, 0); | ^ ...
So include '<sys/mount.h>' to add all of the required declarations.
Signed-off-by: Dmitry Antipov dmantipov@yandex.ru --- 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..972bedc475f1 100644 --- a/tools/testing/selftests/pid_namespace/pid_max.c +++ b/tools/testing/selftests/pid_namespace/pid_max.c @@ -11,6 +11,7 @@ #include <string.h> #include <syscall.h> #include <sys/wait.h> +#include <sys/mount.h>
#include "../kselftest_harness.h" #include "../pidfd/pidfd.h"