linux-kernel - Re: [PATCH] fix a warning on kernel/trace/trace

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Date:	Wed, 07 Oct 2009 15:39:37 +0800
From:	"Helight.Xu" <helight.xu@...il.com>
To:	Li Zefan <lizf@...fujitsu.com>
CC:	linux-kernel@...r.kernel.org, Ingo Molnar <mingo@...hat.com>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Steven Rostedt <rostedt@...dmis.org>
Subject: Re: [PATCH] fix a warning on kernel/trace/trace_branch.c

Li Zefan wrote:
> Zhenwen Xu wrote:
>   
>> fix this warning:
>>
>> kernel/trace/trace_branch.c: In function ‘probe_likely_condition’:
>> kernel/trace/trace_branch.c:58: warning: passing argument 1 of ‘
>> trace_buffer_lock_reserve’ from incompatible pointer type
>>
>> The "tr" should be "(struct buffer *)tr" or "tr->buffer" here!!!
>>
>>     
>
> It's caused by the API change of trace_buffer_lock_reserve() by
> commit e77405ad80f53966524b5c31244e13fbbbecbd84.
>
> Could you send an updated patch to also fix the same bug
> in kernel/trace/trace_hw_branch.c ?
>   
Roger that!
>   
>> Signed-off-by: Zhenwen Xu <helight.xu@...il.com>
>> ---
>>  kernel/trace/trace_branch.c |    2 +-
>>  1 files changed, 1 insertions(+), 1 deletions(-)
>>
>> diff --git a/kernel/trace/trace_branch.c b/kernel/trace/trace_branch.c
>> index 7a7a9fd..216e2dd 100644
>> --- a/kernel/trace/trace_branch.c
>> +++ b/kernel/trace/trace_branch.c
>> @@ -54,7 +54,7 @@ probe_likely_condition(struct ftrace_branch_data *f, int val, int expect)
>>  		goto out;
>>  
>>  	pc = preempt_count();
>> -	event = trace_buffer_lock_reserve(tr, TRACE_BRANCH,
>> +	event = trace_buffer_lock_reserve(tr->buffer, TRACE_BRANCH,
>>  					  sizeof(*entry), flags, pc);
>>  	if (!event)
>>  		goto out;
>>     
>
>
>   


-- 
---------------------------------
Zhenwen Xu - Open and Free
Home Page:	http://zhwen.org

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