Patch "perf test topology: Use !strncmp(right platform) to fix guest PPC comparision check" has been added to the 5.18-stable tree

[Sasha Levin <sashal@xxxxxxxxxx>]

This is a note to let you know that I've just added the patch titled

    perf test topology: Use !strncmp(right platform) to fix guest PPC comparision check

to the 5.18-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     perf-test-topology-use-strncmp-right-platform-to-fix.patch
and it can be found in the queue-5.18 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.



commit b92c9cf7f9966dc64305fa1325ffd0a495657f1b
Author: Athira Rajeev <atrajeev@xxxxxxxxxxxxxxxxxx>
Date:   Fri Jun 10 19:29:39 2022 +0530

    perf test topology: Use !strncmp(right platform) to fix guest PPC comparision check
    
    [ Upstream commit b236371421df57b93fc49c4b9d0e53bd1aab2b2e ]
    
    commit cfd7092c31aed728 ("perf test session topology: Fix test to skip
    the test in guest environment") added check to skip the testcase if the
    socket_id can't be fetched from topology info.
    
    But the condition check uses strncmp which should be changed to !strncmp
    and to correctly match platform.
    
    Fix this condition check.
    
    Fixes: cfd7092c31aed728 ("perf test session topology: Fix test to skip the test in guest environment")
    Reported-by: Thomas Richter <tmricht@xxxxxxxxxxxxx>
    Signed-off-by: Athira Jajeev <atrajeev@xxxxxxxxxxxxxxxxxx>
    Acked-by: Ian Rogers <irogers@xxxxxxxxxx>
    Cc: Athira Rajeev <atrajeev@xxxxxxxxxxxxxxxxxx>
    Cc: Disha Goel <disgoel@xxxxxxxxxxxxxxxxxx>
    Cc: Jiri Olsa <jolsa@xxxxxxxxxx>
    Cc: Kajol Jain <kjain@xxxxxxxxxxxxx>
    Cc: linuxppc-dev@xxxxxxxxxxxxxxxx
    Cc: Madhavan Srinivasan <maddy@xxxxxxxxxxxxx>
    Cc: Michael Ellerman <mpe@xxxxxxxxxxxxxx>
    Cc: Nageswara R Sastry <rnsastry@xxxxxxxxxxxxx>
    Link: https://lore.kernel.org/r/20220610135939.63361-1-atrajeev@xxxxxxxxxxxxxxxxxx
    Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

diff --git a/tools/perf/tests/topology.c b/tools/perf/tests/topology.c
index d23a9e322ff5..0b4f61b6cc6b 100644
--- a/tools/perf/tests/topology.c
+++ b/tools/perf/tests/topology.c
@@ -115,7 +115,7 @@ static int check_cpu_topology(char *path, struct perf_cpu_map *map)
 	 * physical_package_id will be set to -1. Hence skip this
 	 * test if physical_package_id returns -1 for cpu from perf_cpu_map.
 	 */
-	if (strncmp(session->header.env.arch, "powerpc", 7)) {
+	if (!strncmp(session->header.env.arch, "ppc64le", 7)) {
 		if (cpu__get_socket_id(perf_cpu_map__cpu(map, 0)) == -1)
 			return TEST_SKIP;
 	}