[PATCH 2/2] selftests/userfaultfd: improve syscall number definition

From: Andre Przywara
Date: Tue Sep 22 2015 - 06:44:57 EST


At the moment the userfaultfd test program only supports x86 and an
architecture called "powewrpc" ;-)
Fix that typo and add the syscall numbers for other architectures as
well.
Also as in an ideal world a syscall number should come from the system
header file <asm/unistd.h>, include that header and guard the explicit
syscall number section below to avoid redefinitions.

Signed-off-by: Andre Przywara <andre.przywara@xxxxxxx>
---
tools/testing/selftests/vm/userfaultfd.c | 13 ++++++++++++-
1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/tools/testing/selftests/vm/userfaultfd.c b/tools/testing/selftests/vm/userfaultfd.c
index 2c7cca6..63be27f 100644
--- a/tools/testing/selftests/vm/userfaultfd.c
+++ b/tools/testing/selftests/vm/userfaultfd.c
@@ -65,16 +65,27 @@
#include <sys/ioctl.h>
#include <pthread.h>
#include "../../../../include/uapi/linux/userfaultfd.h"
+#include <asm/unistd.h>

+/* ideally the above user header provides that number, but ... */
+#ifndef __NR_userfaultfd
#ifdef __x86_64__
#define __NR_userfaultfd 323
#elif defined(__i386__)
#define __NR_userfaultfd 374
-#elif defined(__powewrpc__)
+#elif defined(__powerpc__)
#define __NR_userfaultfd 364
+#elif defined(__ia64__)
+#define __NR_userfaultfd 1343
+#elif defined(__arm__)
+#define __NR_userfaultfd 388
+#elif defined(__aarch64__)
+/* this is from the generic syscall table, used also on other architectures */
+#define __NR_userfaultfd 283
#else
#error "missing __NR_userfaultfd definition"
#endif
+#endif /* !__NR_userfaultfd */

static unsigned long nr_cpus, nr_pages, nr_pages_per_cpu, page_size;

--
2.5.1

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