Commit 4a823c0b authored by Jia-Ju Bai's avatar Jia-Ju Bai Committed by Viresh Kumar

opp: cpu: Replace GFP_ATOMIC with GFP_KERNEL in dev_pm_opp_init_cpufreq_table

After checking all possible call chains to
dev_pm_opp_init_cpufreq_table() here,
my tool finds that this function is never called in atomic context,
namely never in an interrupt handler or holding a spinlock.
And dev_pm_opp_init_cpufreq_table() calls dev_pm_opp_get_opp_count(),
which calls mutex_lock that can sleep.
It indicates that atmtcp_v_send() can call functions which may sleep.
Thus GFP_ATOMIC is not necessary, and it can be replaced with GFP_KERNEL.

This is found by a static analysis tool named DCNS written by myself.
Signed-off-by: default avatarJia-Ju Bai <baijiaju1990@gmail.com>
Signed-off-by: default avatarViresh Kumar <viresh.kumar@linaro.org>
parent 7928b2cb
......@@ -55,7 +55,7 @@ int dev_pm_opp_init_cpufreq_table(struct device *dev,
if (max_opps <= 0)
return max_opps ? max_opps : -ENODATA;
freq_table = kcalloc((max_opps + 1), sizeof(*freq_table), GFP_ATOMIC);
freq_table = kcalloc((max_opps + 1), sizeof(*freq_table), GFP_KERNEL);
if (!freq_table)
return -ENOMEM;
......
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