linux-kernel - Re: [PATCH 1/2] mm: Move definition of MIN_MEMORY_BLOCK

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Date:	Wed, 29 Jun 2011 13:40:40 +1000
From:	Benjamin Herrenschmidt <benh@...nel.crashing.org>
To:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Cc:	Ingo Molnar <mingo@...e.hu>, Thomas Gleixner <tglx@...utronix.de>,
	"linux-mm@...ck.org" <linux-mm@...ck.org>,
	linuxppc-dev <linuxppc-dev@...ts.ozlabs.org>
Subject: Re: [PATCH 1/2] mm: Move definition of MIN_MEMORY_BLOCK_SIZE to a
 header

On Tue, 2011-06-14 at 10:57 +1000, Benjamin Herrenschmidt wrote:
> The macro MIN_MEMORY_BLOCK_SIZE is currently defined twice in two .c
> files, and I need it in a third one to fix a powerpc bug, so let's
> first move it into a header
> 
> Signed-off-by: Benjamin Herrenschmidt <benh@...nel.crashing.org>
> ---
> 
> Ingo, Thomas: Who needs to ack the x86 bit ? I'd like to send that
> to Linus asap with the powerpc fix.

Anybody ? Allo ?

I'm happy to send that to Linus myself but I'd like at least on or two
acks :-)

Cheers,
Ben.

> diff --git a/arch/x86/mm/init_64.c b/arch/x86/mm/init_64.c
> index d865c4a..bbaaa00 100644
> --- a/arch/x86/mm/init_64.c
> +++ b/arch/x86/mm/init_64.c
> @@ -28,6 +28,7 @@
>  #include <linux/poison.h>
>  #include <linux/dma-mapping.h>
>  #include <linux/module.h>
> +#include <linux/memory.h>
>  #include <linux/memory_hotplug.h>
>  #include <linux/nmi.h>
>  #include <linux/gfp.h>
> @@ -895,8 +896,6 @@ const char *arch_vma_name(struct vm_area_struct *vma)
>  }
>  
>  #ifdef CONFIG_X86_UV
> -#define MIN_MEMORY_BLOCK_SIZE   (1 << SECTION_SIZE_BITS)
> -
>  unsigned long memory_block_size_bytes(void)
>  {
>  	if (is_uv_system()) {
> diff --git a/drivers/base/memory.c b/drivers/base/memory.c
> index 9f9b235..45d7c8f 100644
> --- a/drivers/base/memory.c
> +++ b/drivers/base/memory.c
> @@ -30,7 +30,6 @@
>  static DEFINE_MUTEX(mem_sysfs_mutex);
>  
>  #define MEMORY_CLASS_NAME	"memory"
> -#define MIN_MEMORY_BLOCK_SIZE	(1 << SECTION_SIZE_BITS)
>  
>  static int sections_per_block;
>  
> diff --git a/include/linux/memory.h b/include/linux/memory.h
> index e1e3b2b..935699b 100644
> --- a/include/linux/memory.h
> +++ b/include/linux/memory.h
> @@ -20,6 +20,8 @@
>  #include <linux/compiler.h>
>  #include <linux/mutex.h>
>  
> +#define MIN_MEMORY_BLOCK_SIZE     (1 << SECTION_SIZE_BITS)
> +
>  struct memory_block {
>  	unsigned long start_section_nr;
>  	unsigned long end_section_nr;
> 


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