linux-kernel - [PATCH] cpufreq: armada-8k: make both cpu masks static

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Message-Id: <20250620111459.3366195-1-arnd@kernel.org>
Date: Fri, 20 Jun 2025 13:14:53 +0200
From: Arnd Bergmann <arnd@...nel.org>
To: Andrew Lunn <andrew@...n.ch>,
	Gregory Clement <gregory.clement@...tlin.com>,
	Sebastian Hesselbarth <sebastian.hesselbarth@...il.com>,
	"Rafael J. Wysocki" <rafael@...nel.org>,
	Viresh Kumar <viresh.kumar@...aro.org>,
	"Rob Herring (Arm)" <robh@...nel.org>
Cc: Arnd Bergmann <arnd@...db.de>,
	Jacky Bai <ping.bai@....com>,
	Sudeep Holla <sudeep.holla@....com>,
	linux-arm-kernel@...ts.infradead.org,
	linux-pm@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH] cpufreq: armada-8k: make both cpu masks static

From: Arnd Bergmann <arnd@...db.de>

An earlier patch marked one of the two CPU masks as 'static' to reduce stack
usage, but if CONFIG_NR_CPUS is large enough, the function still produces
a warning for compile testing:

drivers/cpufreq/armada-8k-cpufreq.c: In function 'armada_8k_cpufreq_init':
drivers/cpufreq/armada-8k-cpufreq.c:203:1: error: the frame size of 1416 bytes is larger than 1408 bytes [-Werror=frame-larger-than=]

Normally this should be done using alloc_cpumask_var(), but since the
driver already has a static mask and the probe function is not called
concurrently, use the same trick for both.

Fixes: 1ffec650d07f ("cpufreq: armada-8k: Avoid excessive stack usage")
Signed-off-by: Arnd Bergmann <arnd@...db.de>
---
 drivers/cpufreq/armada-8k-cpufreq.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/cpufreq/armada-8k-cpufreq.c b/drivers/cpufreq/armada-8k-cpufreq.c
index 5a3545bd0d8d..006f4c554dd7 100644
--- a/drivers/cpufreq/armada-8k-cpufreq.c
+++ b/drivers/cpufreq/armada-8k-cpufreq.c
@@ -132,7 +132,7 @@ static int __init armada_8k_cpufreq_init(void)
 	int ret = 0, opps_index = 0, cpu, nb_cpus;
 	struct freq_table *freq_tables;
 	struct device_node *node;
-	static struct cpumask cpus;
+	static struct cpumask cpus, shared_cpus;
 
 	node = of_find_matching_node_and_match(NULL, armada_8k_cpufreq_of_match,
 					       NULL);
@@ -154,7 +154,6 @@ static int __init armada_8k_cpufreq_init(void)
 	 * divisions of it).
 	 */
 	for_each_cpu(cpu, &cpus) {
-		struct cpumask shared_cpus;
 		struct device *cpu_dev;
 		struct clk *clk;
 
-- 
2.39.5