dtrace: add a test probe with an empty translation or two

The empty translation case gets tested nowhere in the kernel, so add a
probe to dt_test with a couple of args that get thrown away by the
translation machinery.

Signed-off-by: Nick Alcock <nick.alcock@oracle.com>
Acked-by: Kris Van Hees <kris.van.hees@oracle.com>
Orabug: 24661801

diff --git a/dtrace/dt_test_dev.c b/dtrace/dt_test_dev.c
index 9292da8e34cd6df236de1a04793cd9fdfb28b25a..da14419f04695fffa1973a9e4422e444b7993c4b 100644 (file)
--- a/dtrace/dt_test_dev.c
+++ b/dtrace/dt_test_dev.c
@@ -106,6 +106,11 @@ static long dt_test_ioctl(struct file *file,
 
 static int dt_test_open(struct inode *inode, struct file *file)
 {
+       /*
+        * Test translation-to-nothing.
+        */
+       DTRACE_PROBE4(sdt__test__open__file, struct inode *,inode, int :, 666,
+                     char * : (), 0, struct file *, file);
        return 0;
 }