[PATCH 2/2] rt-tests: Add SPDX tag to hackbench.c

[John Kacur <jkacur@redhat.com>]

Add SPDX tag GPL-2.0-or-later
The original author is Rusty Russell

In his mail with the following message-id, he says:
Message-ID: <200911022357.36541.rusty@rustcorp.com.au>

> ( I've Cc:-ed Rusty, the original author of hackbench.c. Rusty, the file
>   has no explicit GPLv2 compatible license - is it fine to be put
>   into GPLv2 code? )

Yep, like all my code it's standard v2 "or later".

Sounds like a good plan, thanks!
Rusty.

Signed-off-by: John Kacur <jkacur@redhat.com>
---
 src/hackbench/hackbench.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/hackbench/hackbench.c b/src/hackbench/hackbench.c
index ba804f519950..5a883d341f2e 100644
--- a/src/hackbench/hackbench.c
+++ b/src/hackbench/hackbench.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  * This is the latest version of hackbench.c, that tests scheduler and
  * unix-socket (or pipe) performance.
-- 
2.20.1