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Date:	Mon, 24 Jun 2013 16:12:10 -0700
From:	"H. Peter Anvin" <>
To:	Paul Gortmaker <>
CC:, Thomas Gleixner <>,
	Ingo Molnar <>,
Subject: Re: [PATCH 23/32] x86: delete __cpuinit usage from all x86 files

On 06/24/2013 12:30 PM, Paul Gortmaker wrote:
> The __cpuinit type of throwaway sections might have made sense
> some time ago when RAM was more constrained, but now the savings
> do not offset the cost and complications.  For example, the fix in
> commit 5e427ec2d0 ("x86: Fix bit corruption at CPU resume time")
> is a good example of the nasty type of bugs that can be created
> with improper use of the various __init prefixes.
> After a discussion on LKML[1] it was decided that cpuinit should go
> the way of devinit and be phased out.  Once all the users are gone,
> we can then finally remove the macros themselves from linux/init.h.
> Note that some harmless section mismatch warnings may result, since
> notify_cpu_starting() and cpu_up() are arch independent (kernel/cpu.c)
> are flagged as __cpuinit  -- so if we remove the __cpuinit from
> arch specific callers, we will also get section mismatch warnings.
> As an intermediate step, we intend to turn the linux/init.h cpuinit
> content into no-ops as early as possible, since that will get rid
> of these warnings.  In any case, they are temporary and harmless.
> This removes all the arch/x86 uses of the __cpuinit macros from
> all C files.  x86 only had the one __CPUINIT used in assembly files,
> and it wasn't paired off with a .previous or a __FINIT, so we can
> delete it directly w/o any corresponding additional change there.
> [1]
> Cc: Thomas Gleixner <>
> Cc: Ingo Molnar <>
> Cc: "H. Peter Anvin" <>
> Cc:
> Signed-off-by: Paul Gortmaker <>
> ---

Acked-by: H. Peter Anvin <>

Do you want me to carry this or are you planning to push the entire
thing as a single patchset?


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