linux-kernel - Re: [PATCH] thermal: cpu_cooling: Replace kmalloc with kmalloc

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Message-ID: <20170524022706.GA11529@localhost.localdomain>
Date:   Tue, 23 May 2017 19:27:10 -0700
From:   Eduardo Valentin <edubezval@...il.com>
To:     Viresh Kumar <viresh.kumar@...aro.org>
Cc:     Amit Daniel Kachhap <amit.kachhap@...il.com>,
        Javi Merino <javi.merino@...nel.org>,
        Zhang Rui <rui.zhang@...el.com>, linux-pm@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] thermal: cpu_cooling: Replace kmalloc with kmalloc_array

Hello,

On Tue, May 23, 2017 at 12:33:06PM +0530, Viresh Kumar wrote:
> Checkpatch reports following:
> 
> WARNING: Prefer kmalloc_array over kmalloc with multiply
> +	cpufreq_cdev->freq_table = kmalloc(sizeof(*cpufreq_cdev->freq_table) * i,
> 
> Fix that.

That is how the patch would apply. Enter to continue

WARNING: line over 80 characters
#159: FILE: drivers/thermal/cpu_cooling.c:783:
+	cpufreq_cdev->freq_table = kmalloc(sizeof(*cpufreq_cdev->freq_table) * i,

WARNING: Prefer kmalloc_array over kmalloc with multiply
#159: FILE: drivers/thermal/cpu_cooling.c:783:
+	cpufreq_cdev->freq_table = kmalloc(sizeof(*cpufreq_cdev->freq_table) * i,
+					  GFP_KERNEL);

WARNING: line over 80 characters
#190: FILE: include/linux/cpufreq.h:859:
+static inline int cpufreq_table_count_valid_entries(const struct cpufreq_policy *policy)


> 
> Signed-off-by: Viresh Kumar <viresh.kumar@...aro.org>
> ---
>  drivers/thermal/cpu_cooling.c | 5 +++--
>  1 file changed, 3 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/thermal/cpu_cooling.c b/drivers/thermal/cpu_cooling.c
> index 1305020790b2..908a8014cf76 100644
> --- a/drivers/thermal/cpu_cooling.c
> +++ b/drivers/thermal/cpu_cooling.c
> @@ -724,8 +724,9 @@ __cpufreq_cooling_register(struct device_node *np,
>  	/* max_level is an index, not a counter */
>  	cpufreq_cdev->max_level = i - 1;
>  
> -	cpufreq_cdev->freq_table = kmalloc(sizeof(*cpufreq_cdev->freq_table) * i,
> -					  GFP_KERNEL);
> +	cpufreq_cdev->freq_table = kmalloc_array(i,
> +					sizeof(*cpufreq_cdev->freq_table),
> +					GFP_KERNEL);
>  	if (!cpufreq_cdev->freq_table) {
>  		cdev = ERR_PTR(-ENOMEM);
>  		goto free_idle_time;
> -- 
> 2.13.0.70.g6367777092d9
>