linux-kernel - Re: [PATCH] include/linux/memblock.h: Use __init_memblock for movable_node_is

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Message-ID: <568C6694.5050601@emindsoft.com.cn>
Date:	Wed, 6 Jan 2016 08:57:56 +0800
From:	Chen Gang <chengang@...ndsoft.com.cn>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	will.deacon@....com, tangchen@...fujitsu.com,
	kuleshovmail@...il.com, tony.luck@...el.com,
	vladimir.murzin@....com, baiyaowei@...s.chinamobile.com,
	holt@....com, ard.biesheuvel@...aro.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] include/linux/memblock.h: Use __init_memblock for
 movable_node_is_enabled


OK, thanks. And I shall try to send another patches for mm within this
month.



On 2016年01月06日 06:35, Andrew Morton wrote:
> On Wed,  6 Jan 2016 06:25:56 +0800 chengang@...ndsoft.com.cn wrote:
> 
>> The related warning:
>>
>>     LD      mm/built-in.o
>>   WARNING: mm/built-in.o(.text.unlikely+0x155d): Section mismatch in reference from the function movable_node_is_enabled() to the variable .meminit.data:movable_node_enabled
>>   The function movable_node_is_enabled() references
>>   the variable __meminitdata movable_node_enabled.
>>   This is often because movable_node_is_enabled lacks a __meminitdata
>>   annotation or the annotation of movable_node_enabled is wrong.
> 
> Thanks.  Kirill just sent (almost) the same patch:
> 
> 
> 
> From: "Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>
> Subject: memblock: fix section mismatch
> 
> allmodconfig produces following warning for me:
> 
>   WARNING: vmlinux.o(.text.unlikely+0x10314): Section mismatch in reference from the function movable_node_is_enabled() to the variable .meminit.data:movable_node_enabled
>   The function movable_node_is_enabled() references
>   the variable __meminitdata movable_node_enabled.
>   This is often because movable_node_is_enabled lacks a __meminitdata
>   annotation or the annotation of movable_node_enabled is wrong.
> 
> Let's mark the function with __meminit. It fixes the warning.
> 
> Signed-off-by: Kirill A. Shutemov <kirill.shutemov@...ux.intel.com>
> Signed-off-by: Andrew Morton <akpm@...ux-foundation.org>
> ---
> 
>  include/linux/memblock.h |   18 +++++++++---------
>  1 file changed, 9 insertions(+), 9 deletions(-)
> 
> diff -puN include/linux/memblock.h~memblock-fix-section-mismatch include/linux/memblock.h
> --- a/include/linux/memblock.h~memblock-fix-section-mismatch
> +++ a/include/linux/memblock.h
> @@ -60,6 +60,14 @@ extern int memblock_debug;
>  extern bool movable_node_enabled;
>  #endif /* CONFIG_MOVABLE_NODE */
>  
> +#ifdef CONFIG_ARCH_DISCARD_MEMBLOCK
> +#define __init_memblock __meminit
> +#define __initdata_memblock __meminitdata
> +#else
> +#define __init_memblock
> +#define __initdata_memblock
> +#endif
> +
>  #define memblock_dbg(fmt, ...) \
>  	if (memblock_debug) printk(KERN_INFO pr_fmt(fmt), ##__VA_ARGS__)
>  
> @@ -164,7 +172,7 @@ static inline bool memblock_is_hotplugga
>  	return m->flags & MEMBLOCK_HOTPLUG;
>  }
>  
> -static inline bool movable_node_is_enabled(void)
> +static inline bool __init_memblock movable_node_is_enabled(void)
>  {
>  	return movable_node_enabled;
>  }
> @@ -397,14 +405,6 @@ static inline unsigned long memblock_reg
>  	for (idx = 0; idx < memblock_type->cnt;				\
>  	     idx++,rgn = &memblock_type->regions[idx])
>  
> -#ifdef CONFIG_ARCH_DISCARD_MEMBLOCK
> -#define __init_memblock __meminit
> -#define __initdata_memblock __meminitdata
> -#else
> -#define __init_memblock
> -#define __initdata_memblock
> -#endif
> -
>  #ifdef CONFIG_MEMTEST
>  extern void early_memtest(phys_addr_t start, phys_addr_t end);
>  #else
> _
> 
> 

-- 
Chen Gang (陈刚)

Open, share, and attitude like air, water, and life which God blessed
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