linux-kernel - Re: [tip:timers/urgent] clocksource/fsl: Avoid harmless 64-bit warnings

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Date:	Tue, 17 Nov 2015 12:25:26 +0100
From:	Daniel Lezcano <daniel.lezcano@...aro.org>
To:	kernel@...gutronix.de, mingo@...nel.org, tglx@...utronix.de,
	linux-kernel@...r.kernel.org, Li.Xiubo@...escale.com,
	shawnguo@...nel.org, hpa@...or.com, arnd@...db.de, stefan@...er.ch,
	linux-tip-commits@...r.kernel.org
Subject: Re: [tip:timers/urgent] clocksource/fsl: Avoid harmless 64-bit
 warnings

On 11/17/2015 11:36 AM, tip-bot for Arnd Bergmann wrote:
> Commit-ID:  dde7632ed02382e4bac2b57c66ee2285764f2cd7
> Gitweb:     http://git.kernel.org/tip/dde7632ed02382e4bac2b57c66ee2285764f2cd7
> Author:     Arnd Bergmann <arnd@...db.de>
> AuthorDate: Mon, 16 Nov 2015 17:34:50 +0100
> Committer:  Thomas Gleixner <tglx@...utronix.de>
> CommitDate: Mon, 16 Nov 2015 19:07:08 +0100
>
> clocksource/fsl: Avoid harmless 64-bit warnings
>
> The ftm_clockevent_init passes the value of "~0UL" into a function
> that takes a 32-bit argument, which drops the upper 32 bits, as
> gcc warns about on ARM64:
>
> clocksource/fsl_ftm_timer.c: In function 'ftm_clockevent_init':
> clocksource/fsl_ftm_timer.c:206:13: warning: large integer implicitly truncated to unsigned type [-Woverflow]
>
> This was obviously unintended behavior, and is easily avoided by
> using '~0u' as the integer literal, because that is 32-bit wide
> on all architectures.
>
> Signed-off-by: Arnd Bergmann <arnd@...db.de>
> Cc: linux-arm-kernel@...ts.infradead.org
> Cc: Xiubo Li <Li.Xiubo@...escale.com>
> Cc: Shawn Guo <shawnguo@...nel.org>
> Cc: Sascha Hauer <kernel@...gutronix.de>
> Cc: Stefan Agner <stefan@...er.ch>
> Cc: Daniel Lezcano <daniel.lezcano@...aro.org>
> Link: http://lkml.kernel.org/r/3990834.xnjhm37Grs@wuerfel
> Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
>
> ---

Ok, I dropped the patch from my tree.

   -- Daniel


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