From: Michael Ellerman <mpe@xxxxxxxxxxxxxx>
If __NR_userfaultfd is not yet defined by the arch, warn but still
build and run the userfaultfd selftest successfully.
Signed-off-by: Michael Ellerman <mpe@xxxxxxxxxxxxxx>
Signed-off-by: Andrea Arcangeli <aarcange@xxxxxxxxxx>
---
tools/testing/selftests/vm/userfaultfd.c | 16 +++++++++++++---
1 file changed, 13 insertions(+), 3 deletions(-)
diff --git a/tools/testing/selftests/vm/userfaultfd.c b/tools/testing/selftests/vm/userfaultfd.c
index 23ba5f2..0c7d66f 100644
--- a/tools/testing/selftests/vm/userfaultfd.c
+++ b/tools/testing/selftests/vm/userfaultfd.c
@@ -66,9 +66,7 @@
#include <pthread.h>
#include <linux/userfaultfd.h>
-#ifndef __NR_userfaultfd
-#error "missing __NR_userfaultfd definition"
-#endif
+#ifdef __NR_userfaultfd
static unsigned long nr_cpus, nr_pages, nr_pages_per_cpu, page_size;
@@ -628,3 +626,15 @@ int main(int argc, char **argv)
nr_pages, nr_pages_per_cpu);
return userfaultfd_stress();
}
+
+#else /* __NR_userfaultfd */
+
+#warning "missing __NR_userfaultfd definition"
+
+int main(void)
+{
+ printf("skip: Skipping userfaultfd test (missing __NR_userfaultfd)\n");
+ return 0;
+}
+
+#endif /* __NR_userfaultfd */
--
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