linux-kernel - Re: [PATCH v2 2/3] topology: use bin

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Message-ID: <YLeoVVF8z4ikaRnp@smile.fi.intel.com>
Date:   Wed, 2 Jun 2021 18:48:37 +0300
From:   Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To:     Tian Tao <tiantao6@...ilicon.com>
Cc:     gregkh@...uxfoundation.org, rafael@...nel.org,
        akpm@...ux-foundation.org, jonathan.cameron@...wei.com,
        song.bao.hua@...ilicon.com, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 2/3] topology: use bin_attribute to avoid buff overflow

On Wed, Jun 02, 2021 at 09:48:53PM +0800, Tian Tao wrote:
> Reading sys/devices/system/cpu/cpuX/topology/ returns cpu topology.
> However, the size of this file is limited to PAGE_SIZE because of the
> limitation for sysfs attribute. so we use bin_attribute instead of
> attribute to avoid NR_CPUS too big to cause buff overflow.

> This patch is based on the following discussion.
> https://lore.kernel.org/lkml/20210319041618.14316-2-song.bao.hua@hisilicon.com/

Link: tag?

...

> +static struct bin_attribute *bin_attrs[] = {
> +	&bin_attr_core_cpus,
> +	&bin_attr_core_cpus_list,
> +	&bin_attr_thread_siblings,
> +	&bin_attr_thread_siblings_list,
> +	&bin_attr_core_siblings,
> +	&bin_attr_core_siblings_list,
> +	&bin_attr_die_cpus,
> +	&bin_attr_die_cpus_list,
> +	&bin_attr_package_cpus,
> +	&bin_attr_package_cpus_list,
> +#ifdef CONFIG_SCHED_BOOK
> +	&bin_attr_book_siblings,
> +	&bin_attr_book_siblings_list,
> +#endif
> +#ifdef CONFIG_SCHED_DRAWER
> +	&bin_attr_drawer_siblings,
> +	&bin_attr_drawer_siblings_list,
> +#endif

> +	NULL,

No comma for terminator line.

> +};

-- 
With Best Regards,
Andy Shevchenko