linux-kernel - Re: [PATCH v2 0/3] Fix arm_arch_timer clockmode when vDSO disabled

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Message-ID: <20200222104005.6fc4019d@why>
Date:   Sat, 22 Feb 2020 10:40:05 +0000
From:   Marc Zyngier <maz@...nel.org>
To:     Vincenzo Frascino <vincenzo.frascino@....com>
Cc:     linux-arch@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org, catalin.marinas@....com,
        will.deacon@....com, linux@...linux.org.uk, tglx@...utronix.de,
        luto@...nel.org, m.szyprowski@...sung.com, Mark.Rutland@....com
Subject: Re: [PATCH v2 0/3] Fix arm_arch_timer clockmode when vDSO disabled

On Fri, 21 Feb 2020 18:18:46 +0000
Vincenzo Frascino <vincenzo.frascino@....com> wrote:

> The arm_arch_timer requires that VDSO_CLOCKMODE_ARCHTIMER to be
> defined to compile correctly. On arm the vDSO can be disabled and when
> this is the case the compilation ends prematurely with an error:
> 
>  $ make ARCH=arm multi_v7_defconfig
>  $ ./scripts/config -d VDSO
>  $ make
> 
>  drivers/clocksource/arm_arch_timer.c:73:44: error:
>  ‘VDSO_CLOCKMODE_ARCHTIMER’ undeclared here (not in a function)
>  static enum vdso_clock_mode vdso_default = VDSO_CLOCKMODE_ARCHTIMER;
>                                             ^
>  scripts/Makefile.build:267: recipe for target
>  'drivers/clocksource/arm_arch_timer.o' failed
>  make[2]: *** [drivers/clocksource/arm_arch_timer.o] Error 1
>  make[2]: *** Waiting for unfinished jobs....
>  scripts/Makefile.build:505: recipe for target 'drivers/clocksource' failed
>  make[1]: *** [drivers/clocksource] Error 2
>  make[1]: *** Waiting for unfinished jobs....
>  Makefile:1683: recipe for target 'drivers' failed
>  make: *** [drivers] Error 2
> 
> This patch series addresses the issue defining a default arch clockmode
> for arm and arm64 and using it to initialize the arm_arch_timer.

arm only. arm64 is just fine.

> 
> Changes:
> --------
> v2:
>   - Addressed Marc Zyngier comments.
>   - Rebased on 5.6-rc2.

This doesn't apply to -rc2, and is rather against next.

> 
> Cc: Catalin Marinas <catalin.marinas@....com>
> Cc: Will Deacon <will.deacon@....com>
> Cc: Russell King <linux@...linux.org.uk>
> Cc: Thomas Gleixner <tglx@...utronix.de>
> Cc: Marc Zyngier <maz@...nel.org>
> Cc: Mark Rutland <Mark.Rutland@....com>
> Cc: Marek Szyprowski <m.szyprowski@...sung.com>
> Signed-off-by: Vincenzo Frascino <vincenzo.frascino@....com>
> 
> Vincenzo Frascino (3):
>   arm: clocksource: Add VDSO default clockmode
>   arm64: clocksource: Add VDSO default clockmode
>   clocksource: Fix arm_arch_timer clockmode when vDSO disabled

Please squash the three patches into a single one. There is zero point
in having 3 patches for something that small.

	M.
-- 
Jazz is not dead. It just smells funny...