linux-kernel - Re: [PATH] Fix compilation when CONFIG_TRACE_IRQFLAGS

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Date:	Thu, 04 Sep 2008 10:14:03 -0700
From:	Hiroshi Shimamoto <h-shimamoto@...jp.nec.com>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	Rui Sousa <rui.p.m.sousa@...il.com>, linux-kernel@...r.kernel.org,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Thomas Gleixner <tglx@...utronix.de>,
	"H. Peter Anvin" <hpa@...or.com>
Subject: Re: [PATH] Fix compilation when CONFIG_TRACE_IRQFLAGS_SUPPORT is
 not set

Ingo Molnar wrote:
> * Rui Sousa <rui.p.m.sousa@...il.com> wrote:
> 
>> Hi,
>>
>> This patch fixes compilation if CONFIG_TRACE_IRQFLAGS_SUPPORT is ever 
>> disabled (which is currently not allowed by Kconfig). Alternatively we 
>> could just remove the option altogether and the associated code paths. 
>> Since the compilation error has been in the tree for at least two 
>> years and no one noticed it, I guess we don't really have the need for 
>> CONFIG_TRACE_IRQFLAGS_SUPPORT=n. Boot tested on x86 UP.
> 
> applied to tip/core/locking - thanks Rui.
> 
> since you fixed it i prefer the fix over the removal. We could still 
> remove the !TRACE_IRQFLAGS_SUPPORT now (in a separate commit) and 
> simpify this header a bit that way. Thus if someone needs the 
> !TRACE_IRQFLAGS_SUPPORT mode of build for future work, it can be 
> restored via a simple revert.

Hi, it seems that this patch breaks uml build.

kernel/printk.c: In function 'vprintk':
kernel/printk.c:674: error: implicit declaration of function 'raw_local_irq_save'
kernel/printk.c:772: error: implicit declaration of function 'raw_local_irq_restore'

thanks,
Hiroshi Shimamoto
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