linux-kernel - [PATCH] perf: make pmu

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Message-Id: <20250901071010.350947-1-lihongfu@kylinos.cn>
Date: Mon,  1 Sep 2025 15:10:10 +0800
From: Hongfu Li <lihongfu@...inos.cn>
To: peterz@...radead.org,
	mingo@...hat.com,
	acme@...nel.org,
	namhyung@...nel.org
Cc: mark.rutland@....com,
	alexander.shishkin@...ux.intel.com,
	jolsa@...nel.org,
	irogers@...gle.com,
	adrian.hunter@...el.com,
	kan.liang@...ux.intel.com,
	linux-perf-users@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Hongfu Li <lihongfu@...inos.cn>
Subject: [PATCH] perf: make pmu_bus constant

Since commit d492cc2573a0 ("driver core: device.h: make struct bus_type
a const *"), the driver core can properly handle constant struct
bus_type, move the pmu_bus variable to be a constant structure as well,
placing it into read-only memory which can not be modifie at runtime.

Signed-off-by: Hongfu Li <lihongfu@...inos.cn>
---
 kernel/events/core.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/events/core.c b/kernel/events/core.c
index 872122e074e5..155bb686c8ce 100644
--- a/kernel/events/core.c
+++ b/kernel/events/core.c
@@ -12216,7 +12216,7 @@ static const struct attribute_group *pmu_dev_groups[] = {
 };
 
 static int pmu_bus_running;
-static struct bus_type pmu_bus = {
+static const struct bus_type pmu_bus = {
 	.name		= "event_source",
 	.dev_groups	= pmu_dev_groups,
 };
-- 
2.25.1