linux-kernel - Re: [PATCH] kernel/cpu.c: Section mismatch warning fix.

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Message-ID: <b9df5fa10811011859s48e2f8dnb80d4a76001e8e67@mail.gmail.com>
Date:	Sun, 2 Nov 2008 07:59:47 +0600
From:	"Rakib Mullick" <rakib.mullick@...il.com>
To:	"Ingo Molnar" <mingo@...e.hu>
Cc:	linux-kernel@...r.kernel.org,
	"Andrew Morton" <akpm@...ux-foundation.org>
Subject: Re: [PATCH] kernel/cpu.c: Section mismatch warning fix.

On 10/31/08, Ingo Molnar <mingo@...e.hu> wrote:
>
> * Rakib Mullick <rakib.mullick@...il.com> wrote:
>
>
> you've tested that on x86, right? Have you checked/reviewed all the
> non-x86 architecture codepaths:
>
>  ./arch/m32r/kernel/smpboot.c:	notify_cpu_starting(cpu_id);
>  ./arch/cris/arch-v32/kernel/smp.c:	notify_cpu_starting(cpu);
>  ./arch/s390/kernel/smp.c:	 notify_cpu_starting(smp_processor_id());
>  ./arch/x86/mach-voyager/voyager_smp.c:	notify_cpu_starting(cpuid);
>  ./arch/x86/kernel/smpboot.c:	notify_cpu_starting(cpuid);
>  ./arch/mips/kernel/smp.c:	notify_cpu_starting(cpu);
>  ./arch/sparc64/kernel/smp.c:	notify_cpu_starting(cpuid);
>  ./arch/ia64/kernel/smpboot.c:	notify_cpu_starting(cpuid);
>  ./arch/um/kernel/smp.c:	notify_cpu_starting(cpu);
>  ./arch/sparc/kernel/sun4d_smp.c:	notify_cpu_starting(cpuid);
>  ./arch/sparc/kernel/sun4m_smp.c:	notify_cpu_starting(cpuid);
>  ./arch/powerpc/kernel/smp.c:	notify_cpu_starting(cpu);
>  ./arch/alpha/kernel/smp.c:	notify_cpu_starting(cpuid);
>  ./arch/sh/kernel/smp.c:	notify_cpu_starting(smp_processor_id());
>  ./arch/arm/kernel/smp.c:	notify_cpu_starting(cpu);
>
> to make sure that they never use this function after free_initmem()?
Above codepaths are basically called during initialization, where all
the CPU's are initiated.
When we complete the initial bootup then free_initmem is called. So,
If i'm not wrong they're not using this function after
free_initmem().And notify_cpu_started(cpuid) is declared when
CPU_HOTPLUG is not set. So, It's safe also from CPU hotpluging POV. Am
I missing anything?

Rakib
>
> 	Ingo
>
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