Re: [PATCH -mm] tracing: Fix section mismatch in trace_hw_branches.c

[Sam Ravnborg]

On Mon, Feb 23, 2009 at 01:15:08AM +0900, KOSAKI Motohiro wrote:
> > When I saw this patch, I searched the real purpose of __cpuinit and its
> > real impact.
> > But I didn't find any comments about it inside the kernel.
> 
> AFAIK, __cpuinit mean
> 
> if UP,                     __cpuinit == __init
> if SMP=Y && HOTPLUG_CPU=y, __cpuinit == "" (do nothing)
> if SMP=Y && HOTPLUG_CPU=n, __cpuinit == __init

A function annotated __cpuinit always end up in the same section these
days. And that section are then:

if HOTPLUG_CPU=y, __cpuinit => kept
if HOTPLUG_CPU=n, __cpuinit => discarded

SMP has no influence.

	Sam
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