linux-kernel - Re: [PATCH v6 1/6] uapi: Define the aux vector AT

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Message-ID: <96967F18-2856-46AE-A2AB-A36BBBCD999C@intel.com>
Date:   Wed, 10 Mar 2021 16:31:07 +0000
From:   "Bae, Chang Seok" <chang.seok.bae@...el.com>
To:     Borislav Petkov <bp@...e.de>
CC:     Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...nel.org>,
        Andy Lutomirski <luto@...nel.org>,
        the arch/x86 maintainers <x86@...nel.org>,
        "Brown, Len" <len.brown@...el.com>,
        "Hansen, Dave" <dave.hansen@...el.com>,
        "H.J. Lu" <hjl.tools@...il.com>, Dave Martin <Dave.Martin@....com>,
        Jann Horn <jannh@...gle.com>,
        Michael Ellerman <mpe@...erman.id.au>,
        "carlos@...hat.com" <carlos@...hat.com>,
        "Luck, Tony" <tony.luck@...el.com>,
        "Shankar, Ravi V" <ravi.v.shankar@...el.com>,
        "libc-alpha@...rceware.org" <libc-alpha@...rceware.org>,
        linux-arch <linux-arch@...r.kernel.org>,
        Linux API <linux-api@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH v6 1/6] uapi: Define the aux vector AT_MINSIGSTKSZ

On Mar 1, 2021, at 11:09, Borislav Petkov <bp@...e.de> wrote:
> On Sat, Feb 27, 2021 at 08:59:06AM -0800, Chang S. Bae wrote:
>> 
>> diff --git a/include/uapi/linux/auxvec.h b/include/uapi/linux/auxvec.h
>> index abe5f2b6581b..15be98c75174 100644
>> --- a/include/uapi/linux/auxvec.h
>> +++ b/include/uapi/linux/auxvec.h
>> @@ -33,5 +33,8 @@
>> 
>> #define AT_EXECFN  31	/* filename of program */
>> 
>> +#ifndef AT_MINSIGSTKSZ
>> +#define AT_MINSIGSTKSZ	51	/* stack needed for signal delivery  */
> 
> I know glibc's comment says a similar thing but the correct thing to say
> here should be "minimal stack size for signal delivery" or so. Even the
> variable name alludes to that too.

Yeah, you’re right.

Thanks,
Chang