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| author | Zhao Liu <zhao1.liu@linux.intel.com> | 2022-07-22 05:50:24 +0300 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2022-07-25 21:38:01 +0300 |
| commit | 3e5c04f97c87f5061a37edad11a7b37c3fee2466 (patch) | |
| tree | 030337b736754a06a93e8e70886b59fbfaffade6 /drivers/cpufreq/cpufreq_ondemand.c | |
| parent | 9d822ccf337299d08cf5121929013f3ac21932c9 (diff) | |
| download | linux-3e5c04f97c87f5061a37edad11a7b37c3fee2466.tar.xz | |
cpufreq: ondemand: Use cpumask_var_t for on-stack cpu mask
A cpumask structure on the stack can cause a warning with
CONFIG_NR_CPUS=8192 (e.g. Ubuntu 22.04 uses this):
drivers/cpufreq/cpufreq_ondemand.c: In function 'od_set_powersave_bias':
drivers/cpufreq/cpufreq_ondemand.c:449:1: warning: the frame size of
1032 bytes is larger than 1024 bytes [-Wframe-larger-than=]
449 | }
| ^
CONFIG_CPUMASK_OFFSTACK=y is enabled by default for most distros, and
hence we can work around the warning by using cpumask_var_t.
Signed-off-by: Zhao Liu <zhao1.liu@linux.intel.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/cpufreq/cpufreq_ondemand.c')
| -rw-r--r-- | drivers/cpufreq/cpufreq_ondemand.c | 13 |
1 files changed, 9 insertions, 4 deletions
diff --git a/drivers/cpufreq/cpufreq_ondemand.c b/drivers/cpufreq/cpufreq_ondemand.c index e8fbf970ff07..c52d19d67557 100644 --- a/drivers/cpufreq/cpufreq_ondemand.c +++ b/drivers/cpufreq/cpufreq_ondemand.c @@ -416,10 +416,13 @@ static struct dbs_governor od_dbs_gov = { static void od_set_powersave_bias(unsigned int powersave_bias) { unsigned int cpu; - cpumask_t done; + cpumask_var_t done; + + if (!alloc_cpumask_var(&done, GFP_KERNEL)) + return; default_powersave_bias = powersave_bias; - cpumask_clear(&done); + cpumask_clear(done); cpus_read_lock(); for_each_online_cpu(cpu) { @@ -428,7 +431,7 @@ static void od_set_powersave_bias(unsigned int powersave_bias) struct dbs_data *dbs_data; struct od_dbs_tuners *od_tuners; - if (cpumask_test_cpu(cpu, &done)) + if (cpumask_test_cpu(cpu, done)) continue; policy = cpufreq_cpu_get_raw(cpu); @@ -439,13 +442,15 @@ static void od_set_powersave_bias(unsigned int powersave_bias) if (!policy_dbs) continue; - cpumask_or(&done, &done, policy->cpus); + cpumask_or(done, done, policy->cpus); dbs_data = policy_dbs->dbs_data; od_tuners = dbs_data->tuners; od_tuners->powersave_bias = default_powersave_bias; } cpus_read_unlock(); + + free_cpumask_var(done); } void od_register_powersave_bias_handler(unsigned int (*f) |