linux-kernel - Re: [PATCH 2/2] x86, e820 disable ACPI Memory Hotplug if memory mapping is specified by user [v2]

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Date:	Fri, 10 Jan 2014 14:34:48 -0700
From:	Toshi Kani <toshi.kani@...com>
To:	Prarit Bhargava <prarit@...hat.com>
Cc:	linux-kernel@...r.kernel.org, Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>,
	"H. Peter Anvin" <hpa@...or.com>, x86@...nel.org,
	Len Brown <lenb@...nel.org>,
	"Rafael J. Wysocki" <rjw@...ysocki.net>,
	Linn Crosetto <linn@...com>, Pekka Enberg <penberg@...nel.org>,
	Yinghai Lu <yinghai@...nel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Tang Chen <tangchen@...fujitsu.com>,
	Wen Congyang <wency@...fujitsu.com>,
	Vivek Goyal <vgoyal@...hat.com>, kosaki.motohiro@...il.com,
	dyoung@...hat.com, linux-acpi@...r.kernel.org, linux-mm@...ck.org
Subject: Re: [PATCH 2/2] x86, e820 disable ACPI Memory Hotplug if memory
 mapping is specified by user [v2]

On Fri, 2014-01-10 at 14:04 -0500, Prarit Bhargava wrote:
 :
>  arch/x86/kernel/e820.c         |   10 +++++++++-
>  drivers/acpi/acpi_memhotplug.c |    7 ++++++-
>  include/linux/memory_hotplug.h |    3 +++
>  3 files changed, 18 insertions(+), 2 deletions(-)
> 
> diff --git a/arch/x86/kernel/e820.c b/arch/x86/kernel/e820.c
> index 174da5f..747f36a 100644
> --- a/arch/x86/kernel/e820.c
> +++ b/arch/x86/kernel/e820.c
> @@ -20,6 +20,7 @@
>  #include <linux/firmware-map.h>
>  #include <linux/memblock.h>
>  #include <linux/sort.h>
> +#include <linux/memory_hotplug.h>
>  
>  #include <asm/e820.h>
>  #include <asm/proto.h>
> @@ -834,6 +835,8 @@ static int __init parse_memopt(char *p)
>  		return -EINVAL;
>  	e820_remove_range(mem_size, ULLONG_MAX - mem_size, E820_RAM, 1);
>  
> +	set_acpi_no_memhotplug();
> +

It won't build when CONFIG_ACPI_HOTPLUG_MEMORY is not defined.

Thanks,
-Toshi




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