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From: shuah <shuah@kernel.org>
To: Vincenzo Frascino <vincenzo.frascino@arm.com>,
	linux-arch@vger.kernel.org, linuxppc-dev@lists.ozlabs.org,
	linux-s390@vger.kernel.org, linux-kselftest@vger.kernel.org
Cc: Arnd Bergmann <arnd@arndb.de>,
	Shuah Khan <skhan@linuxfoundation.org>,
	Heiko Carstens <heiko.carstens@de.ibm.com>,
	Paul Mackerras <paulus@samba.org>,
	Martin Schwidefsky <schwidefsky@de.ibm.com>,
	Thomas Gleixner <tglx@linutronix.de>, shuah <shuah@kernel.org>
Subject: Re: [PATCH v5 2/3] s390: Fix vDSO clock_getres()
Date: Thu, 30 May 2019 08:29:38 -0600	[thread overview]
Message-ID: <dbcf69ff-1fe7-3a2e-5940-11fed052d45e@kernel.org> (raw)
In-Reply-To: <20190528120446.48911-3-vincenzo.frascino@arm.com>

On 5/28/19 6:04 AM, Vincenzo Frascino wrote:
> clock_getres in the vDSO library has to preserve the same behaviour
> of posix_get_hrtimer_res().
> 
> In particular, posix_get_hrtimer_res() does:
>      sec = 0;
>      ns = hrtimer_resolution;
> and hrtimer_resolution depends on the enablement of the high
> resolution timers that can happen either at compile or at run time.
> 
> Fix the s390 vdso implementation of clock_getres keeping a copy of
> hrtimer_resolution in vdso data and using that directly.
> 
> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
> Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
> Signed-off-by: Vincenzo Frascino <vincenzo.frascino@arm.com>
> Acked-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
> ---
> 
> Note: This patch is independent from the others in this series, hence it
> can be merged singularly by the s390 maintainers.
> 

Acked-by: Shuah Khan <skhan@linuxfoundation.org>

thanks,
-- Shuah

WARNING: multiple messages have this Message-ID (diff)
From: shuah <shuah@kernel.org>
To: Vincenzo Frascino <vincenzo.frascino@arm.com>,
	linux-arch@vger.kernel.org, linuxppc-dev@lists.ozlabs.org,
	linux-s390@vger.kernel.org, linux-kselftest@vger.kernel.org
Cc: Christophe Leroy <christophe.leroy@c-s.fr>,
	Benjamin Herrenschmidt <benh@kernel.crashing.org>,
	Paul Mackerras <paulus@samba.org>,
	Michael Ellerman <mpe@ellerman.id.au>,
	Martin Schwidefsky <schwidefsky@de.ibm.com>,
	Heiko Carstens <heiko.carstens@de.ibm.com>,
	Thomas Gleixner <tglx@linutronix.de>,
	Arnd Bergmann <arnd@arndb.de>, shuah <shuah@kernel.org>,
	Shuah Khan <skhan@linuxfoundation.org>
Subject: Re: [PATCH v5 2/3] s390: Fix vDSO clock_getres()
Date: Thu, 30 May 2019 08:29:38 -0600	[thread overview]
Message-ID: <dbcf69ff-1fe7-3a2e-5940-11fed052d45e@kernel.org> (raw)
Message-ID: <20190530142938.QrTOuDpy1mksziV-SaszuJYzmK5WBW2KKYxudD_CY1U@z> (raw)
In-Reply-To: <20190528120446.48911-3-vincenzo.frascino@arm.com>

On 5/28/19 6:04 AM, Vincenzo Frascino wrote:
> clock_getres in the vDSO library has to preserve the same behaviour
> of posix_get_hrtimer_res().
> 
> In particular, posix_get_hrtimer_res() does:
>      sec = 0;
>      ns = hrtimer_resolution;
> and hrtimer_resolution depends on the enablement of the high
> resolution timers that can happen either at compile or at run time.
> 
> Fix the s390 vdso implementation of clock_getres keeping a copy of
> hrtimer_resolution in vdso data and using that directly.
> 
> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
> Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
> Signed-off-by: Vincenzo Frascino <vincenzo.frascino@arm.com>
> Acked-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
> ---
> 
> Note: This patch is independent from the others in this series, hence it
> can be merged singularly by the s390 maintainers.
> 

Acked-by: Shuah Khan <skhan@linuxfoundation.org>

thanks,
-- Shuah

WARNING: multiple messages have this Message-ID (diff)
From: shuah at kernel.org (shuah)
Subject: [PATCH v5 2/3] s390: Fix vDSO clock_getres()
Date: Thu, 30 May 2019 08:29:38 -0600	[thread overview]
Message-ID: <dbcf69ff-1fe7-3a2e-5940-11fed052d45e@kernel.org> (raw)
In-Reply-To: <20190528120446.48911-3-vincenzo.frascino@arm.com>

On 5/28/19 6:04 AM, Vincenzo Frascino wrote:
> clock_getres in the vDSO library has to preserve the same behaviour
> of posix_get_hrtimer_res().
> 
> In particular, posix_get_hrtimer_res() does:
>      sec = 0;
>      ns = hrtimer_resolution;
> and hrtimer_resolution depends on the enablement of the high
> resolution timers that can happen either at compile or at run time.
> 
> Fix the s390 vdso implementation of clock_getres keeping a copy of
> hrtimer_resolution in vdso data and using that directly.
> 
> Cc: Martin Schwidefsky <schwidefsky at de.ibm.com>
> Cc: Heiko Carstens <heiko.carstens at de.ibm.com>
> Signed-off-by: Vincenzo Frascino <vincenzo.frascino at arm.com>
> Acked-by: Martin Schwidefsky <schwidefsky at de.ibm.com>
> ---
> 
> Note: This patch is independent from the others in this series, hence it
> can be merged singularly by the s390 maintainers.
> 

Acked-by: Shuah Khan <skhan at linuxfoundation.org>

thanks,
-- Shuah

WARNING: multiple messages have this Message-ID (diff)
From: shuah@kernel.org (shuah)
Subject: [PATCH v5 2/3] s390: Fix vDSO clock_getres()
Date: Thu, 30 May 2019 08:29:38 -0600	[thread overview]
Message-ID: <dbcf69ff-1fe7-3a2e-5940-11fed052d45e@kernel.org> (raw)
Message-ID: <20190530142938.jnGH8IiALo7IF4hUo6eH3PUhiNKKWzrsFKT5kDl7LWo@z> (raw)
In-Reply-To: <20190528120446.48911-3-vincenzo.frascino@arm.com>

On 5/28/19 6:04 AM, Vincenzo Frascino wrote:
> clock_getres in the vDSO library has to preserve the same behaviour
> of posix_get_hrtimer_res().
> 
> In particular, posix_get_hrtimer_res() does:
>      sec = 0;
>      ns = hrtimer_resolution;
> and hrtimer_resolution depends on the enablement of the high
> resolution timers that can happen either at compile or at run time.
> 
> Fix the s390 vdso implementation of clock_getres keeping a copy of
> hrtimer_resolution in vdso data and using that directly.
> 
> Cc: Martin Schwidefsky <schwidefsky at de.ibm.com>
> Cc: Heiko Carstens <heiko.carstens at de.ibm.com>
> Signed-off-by: Vincenzo Frascino <vincenzo.frascino at arm.com>
> Acked-by: Martin Schwidefsky <schwidefsky at de.ibm.com>
> ---
> 
> Note: This patch is independent from the others in this series, hence it
> can be merged singularly by the s390 maintainers.
> 

Acked-by: Shuah Khan <skhan at linuxfoundation.org>

thanks,
-- Shuah

  reply	other threads:[~2019-05-30 14:29 UTC|newest]

Thread overview: 27+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-05-28 12:04 [PATCH v5 0/3] Fix vDSO clock_getres() Vincenzo Frascino
2019-05-28 12:04 ` Vincenzo Frascino
2019-05-28 12:04 ` vincenzo.frascino
2019-05-28 12:04 ` Vincenzo Frascino
2019-05-28 12:04 ` [PATCH v5 1/3] powerpc: " Vincenzo Frascino
2019-05-28 12:04   ` Vincenzo Frascino
2019-05-28 12:04   ` Vincenzo Frascino
2019-05-28 12:04   ` vincenzo.frascino
2019-05-30 14:28   ` shuah
2019-05-30 14:28     ` shuah
2019-05-30 14:28     ` shuah
2019-05-30 14:28     ` shuah
2019-06-04 12:50   ` Sasha Levin
2019-06-04 12:50   ` Sasha Levin
2019-06-04 12:50     ` Sasha Levin
2019-05-28 12:04 ` [PATCH v5 2/3] s390: " Vincenzo Frascino
2019-05-28 12:04   ` Vincenzo Frascino
2019-05-28 12:04   ` vincenzo.frascino
2019-05-28 12:04   ` Vincenzo Frascino
2019-05-30 14:29   ` shuah [this message]
2019-05-30 14:29     ` shuah
2019-05-30 14:29     ` shuah
2019-05-30 14:29     ` shuah
2019-05-28 12:04 ` [PATCH v5 3/3] kselftest: Extend vDSO selftest to clock_getres Vincenzo Frascino
2019-05-28 12:04   ` Vincenzo Frascino
2019-05-28 12:04   ` vincenzo.frascino
2019-05-28 12:04   ` Vincenzo Frascino

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