linux-kernel - Re: linux-next: tip tree build warning

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Date:	Sun, 8 Nov 2009 14:32:47 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	Cyrill Gorcunov <gorcunov@...nvz.org>
Cc:	Stephen Rothwell <sfr@...b.auug.org.au>,
	Thomas Gleixner <tglx@...utronix.de>,
	"H. Peter Anvin" <hpa@...or.com>,
	Peter Zijlstra <peterz@...radead.org>,
	linux-next@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: linux-next: tip tree build warning


* Cyrill Gorcunov <gorcunov@...nvz.org> wrote:

> [Ingo Molnar - Wed, Oct 28, 2009 at 08:50:12AM +0100]
> | 
> | * Stephen Rothwell <sfr@...b.auug.org.au> wrote:
> | 
> | > Hi all,
> | > 
> | > On Wed, 28 Oct 2009 18:41:26 +1100 Stephen Rothwell <sfr@...b.auug.org.au> wrote:
> | > >
> | > > static inline physid_mask_t default_apicid_to_cpu_present(int phys_apicid)
> | > > {
> | > >         return physid_mask_of_physid(phys_apicid);
> | > > }
> | > 
> | > I just noticed that this function (default_apicid_to_cpu_present) is 
> | > declared "static inline in a header" but looks like it is only used by 
> | > assigning its address to a function pointer.  Its only use for x86_64 
> | > is in arch/x86/kernel/apic/apic_noop.c ...
> | 
> | yes, that might be a real problem - returning the mask like that is 
> | messy. Thanks, will check.
> | 
> | 	Ingo
> | 
> 
> Darn, my fault sorry! Here is an update which fixes the issue.
> (Btw, Stephen could you CC me next time if you get commit id
>  with me in authors, so I wouldn't miss problem).
> 
> Please review, comments/complains are quite welcome!
> 
> 	-- Cyrill
> ---
> x86,apic: Get rid of apicid_to_cpu_present assign on X86-64
> 
> In fact it's never get used on x86-64 (for 64 bit platform
> we use differ technique to enumerate io-units).
> 
> Signed-off-by: Cyrill Gorcunov <gorcunov@...nvz.org>
> ---
>  arch/x86/kernel/apic/apic_noop.c |    5 +++++
>  1 file changed, 5 insertions(+)
> 
> Index: linux-2.6.git/arch/x86/kernel/apic/apic_noop.c
> =====================================================================
> --- linux-2.6.git.orig/arch/x86/kernel/apic/apic_noop.c
> +++ linux-2.6.git/arch/x86/kernel/apic/apic_noop.c
> @@ -162,7 +162,12 @@ struct apic apic_noop = {
>  
>  	.cpu_to_logical_apicid		= noop_cpu_to_logical_apicid,
>  	.cpu_present_to_apicid		= default_cpu_present_to_apicid,
> +
> +#ifdef CONFIG_X86_32
>  	.apicid_to_cpu_present		= default_apicid_to_cpu_present,
> +#else
> +	.apicid_to_cpu_present		= NULL,
> +#endif

would be better to unify this instead ...

	Ingo
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