Re: [bug] __meminit breaks cpu hotplug

[Andrew Morton <akpm@osdl.org>]

Ravikiran G Thirumalai <kiran@scalex86.org> wrote:
>
> Recent __meminit additions broke cpu hotplug when the kernel is configured 
> with  HOTPLUG_CPU but not HOTPLUG_MEMORY.   
> Although __meminit replaced __devinit functions many places, all those functions
> looked like they should have been marked with __cpuinit to begin with.  That
> is the reason I have changed the below to __cpuinit.  I leave it to Matt if he
> wants to use __devinit here instead. (Depending on where he sees __meminit
> would be used.)
> 
> Signed-off-by: Ravikiran Thirumalai <kiran@scalex86.org>
> Signed-off-by: Shai Fultheim <shai@scalex86.org>
> 
> Index: linux-2.6.16-rc1/include/linux/init.h
> ===================================================================
> --- linux-2.6.16-rc1.orig/include/linux/init.h	2006-01-17 14:12:16.000000000 -0800
> +++ linux-2.6.16-rc1/include/linux/init.h	2006-01-20 12:24:44.000000000 -0800
> @@ -247,10 +247,10 @@ void __init parse_early_param(void);
>  #define __memexit
>  #define __memexitdata
>  #else
> -#define __meminit	__init
> -#define __meminitdata __initdata
> -#define __memexit __exit
> -#define __memexitdata	__exitdata
> +#define __meminit	__cpuinit
> +#define __meminitdata __cpuinitdata
> +#define __memexit __cpuexit
> +#define __memexitdata	__cpuexitdata

This looks wrong.  The __meminit and __cpuinit definitions we have now are
OK, aren't they?  Surely the problem is that some functions/variables are
incorrectly tagged?

If some function is needed by both HOTPLUG_CPU and HOTPLUG_MEMORY then
we're rather messed up - I guess it'll need to be put inside #if
defined(..) || defined(..) and put into plain old .text.