linux-kernel - Re: [PATCH] genirq: fix symbol export for __irq_set

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Message-ID: <alpine.DEB.2.11.1412182340300.17382@nanos>
Date:	Thu, 18 Dec 2014 23:42:03 +0100 (CET)
From:	Thomas Gleixner <tglx@...utronix.de>
To:	Jesse Brandeburg <jesse.brandeburg@...el.com>
cc:	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] genirq: fix symbol export for __irq_set_affinity

On Thu, 18 Dec 2014, Jesse Brandeburg wrote:

> The function __irq_set_affinity is referenced by interrupt.h
> with static inlines, but if you try to use one of the inlines
> in interrupt.h (for instance to call irq_set_affinity) then
> compile fails due to a missing symbol, when building modules.
> 
> Enabling this function means that kernel drivers can include
> an initial affinity setting for the interrupt, instead of all
> interrupts starting out life on CPU0.  It seems to have just
> been an oversight that it was not included.
> 
> This function and the helpers that call it from interrupt.h were
> already in the kernel API, but if used would then fail to compile
> due to the lack of an export even though already defined via extern.

And why needs this to be called from modules? Just because or is there
a legitimate reason? IOW, you forgot to describe the actual usecase.

Thanks,

	tglx
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