linux-kernel - Re: [PATCH] mips: Fix gettimeofday() in the vdso library

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Message-ID: <0b64c6bb-ffc7-059d-3cb3-012092e0fcf0@arm.com>
Date:   Fri, 29 Nov 2019 14:58:52 +0000
From:   Vincenzo Frascino <vincenzo.frascino@....com>
To:     "H. Nikolaus Schaller" <hns@...delico.com>
Cc:     Paul Burton <paulburton@...nel.org>,
        mips-creator-ci20-dev@...glegroups.com,
        letux-kernel@...nphoenux.org, linux-mips@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] mips: Fix gettimeofday() in the vdso library

On 11/29/19 2:52 PM, H. Nikolaus Schaller wrote:
> 
>> Am 29.11.2019 um 15:36 schrieb Vincenzo Frascino <vincenzo.frascino@....com>:
>>
>> The libc provides a discovery mechanism for vDSO library and its
>> symbols. When a symbol is not exposed by the vDSOs the libc falls back
>> on the system calls.
>>
>> With the introduction of the unified vDSO library on mips this behavior
>> is not honored anymore by the kernel in the case of gettimeofday().
>>
>> The issue has been noticed and reported due to a dhclient failure on the
>> CI20 board:
>>
>> root@...ux:~# dhclient
>> ../../../../lib/isc/unix/time.c:200: Operation not permitted
>> root@...ux:~#
>>
>> Restore the original behavior fixing gettimeofday() in the vDSO library.
>>
>> Cc: Paul Burton <paulburton@...nel.org>
>> Reported-by: H. Nikolaus Schaller <hns@...delico.com>
>> Testes-by: H. Nikolaus Schaller <hns@...delico.com> # CI20 with JZ4780
> ^^^ funny typo... -> Tested-by:

Ops, I copy-pasted it from your email ;) Can't trust you ;)

-- 
Regards,
Vincenzo