linux-kernel - Re: [PATCH v2 4/7] gpio: mockup: improve readability

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Message-ID: <CAHp75VfKEUeNEf1xJ_9+wi0UREznfUxs6Pu1EZWbmuoB15bZ9Q@mail.gmail.com>
Date:   Tue, 30 May 2017 21:55:13 +0300
From:   Andy Shevchenko <andy.shevchenko@...il.com>
To:     Bartosz Golaszewski <brgl@...ev.pl>
Cc:     Linus Walleij <linus.walleij@...aro.org>,
        Alexandre Courbot <gnurou@...il.com>,
        Bamvor Jian Zhang <bamvor.zhangjian@...aro.org>,
        "linux-gpio@...r.kernel.org" <linux-gpio@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2 4/7] gpio: mockup: improve readability

On Tue, May 30, 2017 at 11:58 AM, Bartosz Golaszewski <brgl@...ev.pl> wrote:
> We currently shift bits here and there without actually explaining
> what we're doing. Add some helper variables with names indicating
> their purpose to improve the code readability.

> +       /* Each chip is described by two values. */
> +       num_chips = gpio_mockup_params_nr / 2;
> +
> +       chips = devm_kzalloc(dev, sizeof(*chips) * num_chips, GFP_KERNEL);

It's effectively
devm_kcalloc()
or
devm_kmalloc_array()
depending on the requirement of zeroing a memory chunks.

-- 
With Best Regards,
Andy Shevchenko