linux-kernel - Re: [PATCH v1 7/7] jump_label: use defined macros instead of hard-coding for better readability

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Date:	Wed, 25 Sep 2013 23:47:19 +0800
From:	Jiang Liu <liuj97@...il.com>
To:	Steven Rostedt <rostedt@...dmis.org>
CC:	Catalin Marinas <catalin.marinas@....com>,
	Will Deacon <will.deacon@....com>,
	Jiang Liu <jiang.liu@...wei.com>,
	Andrew Jones <drjones@...hat.com>,
	Raghavendra K T <raghavendra.kt@...ux.vnet.ibm.com>,
	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
	"H. Peter Anvin" <hpa@...ux.intel.com>,
	linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH v1 7/7] jump_label: use defined macros instead of hard-coding
 for better readability

On 09/25/2013 10:53 PM, Steven Rostedt wrote:
> On Wed, 25 Sep 2013 18:44:27 +0800
> Jiang Liu <liuj97@...il.com> wrote:
> 
>> From: Jiang Liu <jiang.liu@...wei.com>
>>
>> Use macro JUMP_LABEL_TRUE_BRANCH instead of hard-coding for better
>> readability.
>>
>> Signed-off-by: Jiang Liu <jiang.liu@...wei.com>
>> Cc: Jiang Liu <liuj97@...il.com>
>> ---
>>  include/linux/jump_label.h | 3 ++-
>>  1 file changed, 2 insertions(+), 1 deletion(-)
>>
>> diff --git a/include/linux/jump_label.h b/include/linux/jump_label.h
>> index a507907..b697fbd 100644
>> --- a/include/linux/jump_label.h
>> +++ b/include/linux/jump_label.h
>> @@ -116,7 +116,8 @@ extern void static_key_slow_dec(struct static_key *key);
>>  extern void jump_label_apply_nops(struct module *mod);
>>  
>>  #define STATIC_KEY_INIT_TRUE ((struct static_key) \
>> -	{ .enabled = ATOMIC_INIT(1), .entries = (void *)1 })
>> +	{ .enabled = ATOMIC_INIT(1), \
>> +	  .entries = (void *)JUMP_LABEL_TRUE_BRANCH })
>>  #define STATIC_KEY_INIT_FALSE ((struct static_key) \
>>  	{ .enabled = ATOMIC_INIT(0), .entries = (void *)0 })
>>  
> 
> Probably should add a comment that there is no
> "JUMP_LABEL_FALSE_BRANCH" or maybe we should add one?
Hi Steven,
	How about
JUMP_LABEL_TYPE_MASK/JUMP_LABEL_TRUE_BRANCH/JUMP_LABEL_FALSE_BRANCH
tuple? That should have the best readability.
Thanks!

> 
> -- Steve
> 
> 

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