linux-kernel - Re: + sysctl-add-proc_dointvec_unsigned-handler.patch added to -mm tree

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Date:	Tue, 8 Mar 2011 13:43:31 +0800
From:	Dave Young <hidave.darkstar@...il.com>
To:	Alexey Dobriyan <adobriyan@...il.com>
Cc:	linux-kernel@...r.kernel.org, akpm@...ux-foundation.org
Subject: Re: + sysctl-add-proc_dointvec_unsigned-handler.patch added to -mm tree

On Tue, Mar 8, 2011 at 1:15 PM, Dave Young <hidave.darkstar@...il.com> wrote:
> On Tue, Mar 8, 2011 at 7:26 AM, Alexey Dobriyan <adobriyan@...il.com> wrote:
>> On Mon, Mar 07, 2011 at 03:05:43PM -0800, akpm@...ux-foundation.org wrote:
>>> Add a proc_dointvec_unsigned() sysctl handler for positive value cases.
>>
>>> --- a/kernel/sysctl.c~sysctl-add-proc_dointvec_unsigned-handler
>>> +++ a/kernel/sysctl.c
>>
>>> +int proc_dointvec_unsigned(struct ctl_table *table, int write,
>>> +               void __user *buffer, size_t *lenp, loff_t *ppos)
>>> +{
>>> +     struct do_proc_dointvec_minmax_conv_param param = {
>>> +             .min = &zero,
>>> +     };
>>> +     return do_proc_dointvec(table, write, buffer, lenp, ppos,
>>> +                             do_proc_dointvec_minmax_conv, &param);
>>> +}
>>
>> This silently ignored max value in .extra2 .
>
> Hi,
>
> Good cache, should set .max = NULL here

Oh, c99 set default value to 0, isn't it?

What do you mean silently ignore here?

Let's see the code:

 if ((param->min && *param->min > val) ||
                    (param->max && *param->max < val))
                    return -EINVAL;

There's no problem max == NULL

-- 
Regards
dave
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