linux-kernel - Re: [tip:timers/core] clocksource: Increase dependencies of timer-stm32 to limit build wreckage

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Date:	Mon, 22 Jun 2015 10:05:11 +0200
From:	Maxime Coquelin <mcoquelin.stm32@...il.com>
To:	Daniel Lezcano <daniel.lezcano@...aro.org>, hpa@...or.com,
	mingo@...nel.org, paul.gortmaker@...driver.com,
	Linus Walleij <linus.walleij@...aro.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Maxime Coquelin <mcoquelin.stm32@...il.com>
Cc:	linux-tip-commits@...r.kernel.org,
	Chanwoo Choi <cw00.choi@...sung.com>
Subject: Re: [tip:timers/core] clocksource: Increase dependencies of
 timer-stm32 to limit build wreckage

2015-06-21 20:03 GMT+02:00 tip-bot for Paul Gortmaker <tipbot@...or.com>:
> Commit-ID:  1cb6c2151850584ee805fdcf088af0bb81f4b086
> Gitweb:     http://git.kernel.org/tip/1cb6c2151850584ee805fdcf088af0bb81f4b086
> Author:     Paul Gortmaker <paul.gortmaker@...driver.com>
> AuthorDate: Sat, 20 Jun 2015 19:02:32 -0400
> Committer:  Thomas Gleixner <tglx@...utronix.de>
> CommitDate: Sun, 21 Jun 2015 20:01:48 +0200
>
> clocksource: Increase dependencies of timer-stm32 to limit build wreckage
>
> This driver leaks out into arch/parisc builds that don't have
> CONFIG_GENERIC_CLOCKEVENTS, leading to the following (truncated)
> wreckage:
>
>   CC      drivers/clocksource/timer-stm32.o
> drivers/clocksource/timer-stm32.c:38:28: error: field 'evtdev' has incomplete type
> drivers/clocksource/timer-stm32.c:44:19: warning: 'enum clock_event_mode' declared inside parameter list
> drivers/clocksource/timer-stm32.c:44:19: warning: its scope is only this definition or declaration, which is probably not what you want
> drivers/clocksource/timer-stm32.c:43:62: error: parameter 1 ('mode') has incomplete type
> drivers/clocksource/timer-stm32.c:43:13: error: function declaration isn't a prototype
> drivers/clocksource/timer-stm32.c: In function 'stm32_clock_event_set_mode':
> drivers/clocksource/timer-stm32.c:47:3: error: type defaults to 'int' in declaration of '__mptr'
> drivers/clocksource/timer-stm32.c:47:3: warning: initialization from incompatible pointer type
> drivers/clocksource/timer-stm32.c:51:7: error: 'CLOCK_EVT_MODE_PERIODIC' undeclared (first use in this function)
> drivers/clocksource/timer-stm32.c:51:7: note: each undeclared identifier is reported only once for each function it appears in
> drivers/clocksource/timer-stm32.c:56:7: error: 'CLOCK_EVT_MODE_ONESHOT' undeclared (first use in this function)
>
> Tighten up the dependencies to limit where it gets built by copying
> the style of the Kconfig line for CLKSRC_EFM32 a few lines above.
>
> Signed-off-by: Paul Gortmaker <paul.gortmaker@...driver.com>
> Cc: Linus Walleij <linus.walleij@...aro.org>
> Cc: Chanwoo Choi <cw00.choi@...sung.com>
> Cc: Maxime Coquelin <mcoquelin.stm32@...il.com>
> Cc: Daniel Lezcano <daniel.lezcano@...aro.org>
> Link: http://lkml.kernel.org/r/1434841352-24300-1-git-send-email-paul.gortmaker@windriver.com
> Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
> ---
>  drivers/clocksource/Kconfig | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
>

Thanks Paul for the patch.
Actually, I already had sent a patch to fix this dependency issue [0].
I thought Daniel had pick it, but don't find it in his tree.
My patch adds a build dependency on GENERIC_CLOCKEVENTS, which I think
is the best way to fix the problem.

Regards,
Maxime

[0]: https://lkml.org/lkml/2015/6/7/47
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