linux-kernel - Re: [PATCH vdsotest] Use vdso wrapper for gettimeofday()

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Message-ID: <01e576b8-fe93-1026-5b39-f878297d6835@c-s.fr>
Date:   Thu, 16 Jan 2020 18:59:49 +0100
From:   Christophe Leroy <christophe.leroy@....fr>
To:     Nathan Lynch <nathanl@...ux.ibm.com>
Cc:     Thomas Gleixner <tglx@...utronix.de>,
        linuxppc-dev@...ts.ozlabs.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH vdsotest] Use vdso wrapper for gettimeofday()



Le 16/01/2020 à 17:56, Nathan Lynch a écrit :
> Hi Christophe,
> 
> Christophe Leroy <christophe.leroy@....fr> writes:
>> To properly handle errors returned by gettimeofday(), the
>> DO_VDSO_CALL() macro has to be used, otherwise vdsotest
>> misinterpret VDSO function return on error.
>>
>> This has gone unnoticed until now because the powerpc VDSO
>> gettimeofday() always succeed, but while porting powerpc to
>> generic C VDSO, the following has been encountered:
> 
> Thanks for this, I'll review it soon.
> 
> Can you point me to patches for the powerpc generic vdso work?
> 

Sure.

v3 is at 
https://patchwork.ozlabs.org/project/linuxppc-dev/list/?series=152867

I added you in v4 destinees.

Christophe