tests: fix pidfd-test compilation

[ Upstream commit 1fcd0eb356ad56c4e405f06e31dd9fde2109d5ab ]

Define __NR_pidfd_send_signal if it isn't to prevent a potential
compilation error.

To make pidfd-test compile on all arches, irrespective of whether
or not syscall numbers are assigned, define the syscall number to -1.
If it isn't defined this will cause the kernel to return -ENOSYS.

Fixes: 575a0ae9744d ("selftests: add tests for pidfd_send_signal()")
Signed-off-by: Christian Brauner <christian@brauner.io>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/tools/testing/selftests/pidfd/pidfd_test.c b/tools/testing/selftests/pidfd/pidfd_test.c
index d59378a93782ed4edc2c80e737b178baaa816736..20323f55613a08d20ad5b3ce38f527df7b204333 100644 (file)
--- a/tools/testing/selftests/pidfd/pidfd_test.c
+++ b/tools/testing/selftests/pidfd/pidfd_test.c
@@ -16,6 +16,10 @@
 
 #include "../kselftest.h"
 
+#ifndef __NR_pidfd_send_signal
+#define __NR_pidfd_send_signal -1
+#endif
+
 static inline int sys_pidfd_send_signal(int pidfd, int sig, siginfo_t *info,
                                        unsigned int flags)
 {