linux-kernel - Re: [patch 2/3] add new macros to make percpu readmostly section correctly align

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Message-ID: <4D08CBF4.6040102@gmail.com>
Date:	Wed, 15 Dec 2010 15:08:52 +0100
From:	Tejun Heo <htejun@...il.com>
To:	Shaohua Li <shaohua.li@...el.com>
CC:	lkml <linux-kernel@...r.kernel.org>,
	"hpa@...or.com" <hpa@...or.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	"sam@...nborg.org" <sam@...nborg.org>,
	"eric.dumazet@...il.com" <eric.dumazet@...il.com>
Subject: Re: [patch 2/3] add new macros to make percpu readmostly section
 correctly align

Hello,

On 12/15/2010 02:57 AM, Shaohua Li wrote:
> How about this one?

Much better.  :-)

> +#ifdef INTERNODE_CACHE_BYTES
> +#define INTERNODE_CACHEALIGNED						\
> +	. = ALIGN(INTERNODE_CACHE_BYTES);
> +#else
> +#define INTERNODE_CACHEALIGNED
> +#endif

Yeah, this looks good.

> Index: linux/arch/x86/kernel/vmlinux.lds.S
> ===================================================================
> --- linux.orig/arch/x86/kernel/vmlinux.lds.S	2010-12-15 09:37:01.000000000 +0800
> +++ linux/arch/x86/kernel/vmlinux.lds.S	2010-12-15 09:37:06.000000000 +0800
> @@ -20,11 +20,11 @@
>  #define LOAD_OFFSET __START_KERNEL_map
>  #endif
>  
> -#include <asm-generic/vmlinux.lds.h>
>  #include <asm/asm-offsets.h>
>  #include <asm/thread_info.h>
>  #include <asm/page_types.h>
>  #include <asm/cache.h>
> +#include <asm-generic/vmlinux.lds.h>
>  #include <asm/boot.h>

Why do we need this chunk?

Thanks.

-- 
tejun
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