From: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
To: Tian Tao <tiantao6@hisilicon.com>
Cc: gregkh@linuxfoundation.org, rafael@kernel.org,
akpm@linux-foundation.org, jonathan.cameron@huawei.com,
song.bao.hua@hisilicon.com, linux-kernel@vger.kernel.org
Subject: Re: [PATCH v2 3/3] drivers/base/node.c: use bin_attribute to avoid buff overflow
Date: Wed, 2 Jun 2021 18:50:24 +0300 [thread overview]
Message-ID: <YLeowAzQPfJK3oap@smile.fi.intel.com> (raw)
In-Reply-To: <1622641734-22538-4-git-send-email-tiantao6@hisilicon.com>
On Wed, Jun 02, 2021 at 09:48:54PM +0800, Tian Tao wrote:
> Reading sys/devices/system/cpu/cpuX/nodeX/ returns cpumap and cpulist.
> 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.
...
> -static ssize_t node_read_cpumap(struct device *dev, bool list, char *buf)
> +static ssize_t node_read_cpumap(struct device *dev, bool list,
> + char *buf, loff_t off, size_t count)
Why you moved char *buf to the next line? Replacing ) by , doesn't change
character count. Perhaps you need to reconfigure your editor.
...
> +static struct bin_attribute *node_dev_bin_attrs[] = {
> + &bin_attr_cpumap,
> + &bin_attr_cpulist,
> + NULL,
No comma.
> +};
...
> +static const struct attribute_group *node_dev_groups[] = {
> + &node_dev_group,
> + NULL,
Ditto.
> +};
--
With Best Regards,
Andy Shevchenko
next prev parent reply other threads:[~2021-06-02 15:50 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-06-02 13:48 [PATCH v2 0/3] use bin_attribute to avoid buff overflow Tian Tao
2021-06-02 13:48 ` [PATCH v2 1/3] lib: bitmap: introduce bitmap_print_to_buf Tian Tao
2021-06-02 14:22 ` Jonathan Cameron
2021-06-02 15:47 ` Andy Shevchenko
2021-06-02 13:48 ` [PATCH v2 2/3] topology: use bin_attribute to avoid buff overflow Tian Tao
2021-06-02 15:48 ` Andy Shevchenko
2021-06-02 13:48 ` [PATCH v2 3/3] drivers/base/node.c: " Tian Tao
2021-06-02 15:50 ` Andy Shevchenko [this message]
2021-06-02 15:42 ` [PATCH v2 0/3] " Andy Shevchenko
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