linux-kernel - Re: [PATCH] x86: fix unconditional arch/x86/kernel/pcspeaker.c compiling

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Date:	Thu, 17 Jan 2008 11:13:51 -0600
From:	Matt Mackall <mpm@...enic.com>
To:	Michael Opdenacker <michael-lists@...e-electrons.com>
Cc:	linux-kernel@...r.kernel.org, Linux-tiny@...enic.com,
	Ingo Molnar <mingo@...e.hu>
Subject: Re: [PATCH] x86: fix unconditional
	arch/x86/kernel/pcspeaker.c	compiling


On Thu, 2008-01-17 at 18:05 +0100, Michael Opdenacker wrote:
> Hi Matt,
> 
> Thanks for your feedback!
> 
> On 01/17/2008 05:36 PM, Matt Mackall wrote:
> > On Thu, 2008-01-17 at 16:43 +0100, Michael Opdenacker wrote:
> >   
> >> diff -Naur linux-2.6.24-rc8-git1/arch/x86/kernel/Makefile_32 linux-2.6.24-rc8-git1-nopcspeaker/arch/x86/kernel/Makefile_32
> >> --- linux-2.6.24-rc8-git1/arch/x86/kernel/Makefile_32	2008-01-17 09:48:58.000000000 +0100
> >> +++ linux-2.6.24-rc8-git1-nopcspeaker/arch/x86/kernel/Makefile_32	2008-01-17 10:06:56.000000000 +0100
> >> @@ -45,10 +45,13 @@
> >>  
> >>  obj-$(CONFIG_VMI)		+= vmi_32.o vmiclock_32.o
> >>  obj-$(CONFIG_PARAVIRT)		+= paravirt_32.o
> >> -obj-y				+= pcspeaker.o
> >> -
> >>  obj-$(CONFIG_SCx200)		+= scx200_32.o
> >>  
> >> +ifeq ($(CONFIG_INPUT_PCSPKR),y)
> >> +	obj-y			+= pcspeaker.o
> >> +endif
> >>     
> >
> > I'm not sure this does what you want. What if CONFIG_INPUT_PCSPKR = m?
> >   
> Does it make sense to compile arch/x86/kernel/pcspeaker.c as a module?
> It defines no init and exit functions, and it defines an initcall, which
> only makes sense at boot time.

Probably not. However, the above code won't build pcspeaker.o if
CONFIG_INPUT_PCSPKR = m. In other words, it'll break.

-- 
Mathematics is the supreme nostalgia of our time.

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