Patch "tools/power turbostat: Remember global max_die_id" has been added to the 6.9-stable tree

[Sasha Levin <sashal@xxxxxxxxxx>]

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

    tools/power turbostat: Remember global max_die_id

to the 6.9-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:
     tools-power-turbostat-remember-global-max_die_id.patch
and it can be found in the queue-6.9 subdirectory.

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



commit bd9faa4e50dff75e836f229ed4fc3057331104e0
Author: Len Brown <len.brown@xxxxxxxxx>
Date:   Sun Apr 21 11:56:48 2024 -0400

    tools/power turbostat: Remember global max_die_id
    
    [ Upstream commit cda203388687aa075db6f8996c3c4549fa518ea8 ]
    
    This is necessary to gracefully handle sparse die_id's.
    
    no functional change
    
    Signed-off-by: Len Brown <len.brown@xxxxxxxxx>
    Stable-dep-of: 3559ea813ad3 ("tools/power turbostat: Avoid possible memory corruption due to sparse topology IDs")
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

diff --git a/tools/power/x86/turbostat/turbostat.c b/tools/power/x86/turbostat/turbostat.c
index 8071a3ef2a2e8..25417c3a47ab6 100644
--- a/tools/power/x86/turbostat/turbostat.c
+++ b/tools/power/x86/turbostat/turbostat.c
@@ -1415,6 +1415,7 @@ struct topo_params {
 	int allowed_cpus;
 	int allowed_cores;
 	int max_cpu_num;
+	int max_die_id;
 	int max_node_num;
 	int nodes_per_pkg;
 	int cores_per_node;
@@ -6967,7 +6968,6 @@ void topology_probe(bool startup)
 	int i;
 	int max_core_id = 0;
 	int max_package_id = 0;
-	int max_die_id = 0;
 	int max_siblings = 0;
 
 	/* Initialize num_cpus, max_cpu_num */
@@ -7084,8 +7084,8 @@ void topology_probe(bool startup)
 
 		/* get die information */
 		cpus[i].die_id = get_die_id(i);
-		if (cpus[i].die_id > max_die_id)
-			max_die_id = cpus[i].die_id;
+		if (cpus[i].die_id > topo.max_die_id)
+			topo.max_die_id = cpus[i].die_id;
 
 		/* get numa node information */
 		cpus[i].physical_node_id = get_physical_node_id(&cpus[i]);
@@ -7111,9 +7111,9 @@ void topology_probe(bool startup)
 	if (!summary_only && topo.cores_per_node > 1)
 		BIC_PRESENT(BIC_Core);
 
-	topo.num_die = max_die_id + 1;
+	topo.num_die = topo.max_die_id + 1;
 	if (debug > 1)
-		fprintf(outf, "max_die_id %d, sizing for %d die\n", max_die_id, topo.num_die);
+		fprintf(outf, "max_die_id %d, sizing for %d die\n", topo.max_die_id, topo.num_die);
 	if (!summary_only && topo.num_die > 1)
 		BIC_PRESENT(BIC_Die);