linux-kernel - Re: [PATCH 5/5] blktrace: print human-readable act

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Date:	Tue, 24 Mar 2009 12:04:43 -0400 (EDT)
From:	Steven Rostedt <rostedt@...dmis.org>
To:	Ingo Molnar <mingo@...e.hu>
cc:	Li Zefan <lizf@...fujitsu.com>, Jens Axboe <jens.axboe@...cle.com>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Arnaldo Carvalho de Melo <acme@...hat.com>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 5/5] blktrace: print human-readable act_mask




On Tue, 24 Mar 2009, Ingo Molnar wrote:

> 
> * Steven Rostedt <rostedt@...dmis.org> wrote:
> 
> > 
> > 
> > On Tue, 24 Mar 2009, Li Zefan wrote:
> > >  
> > > +static ssize_t blk_trace_mask2str(char *buf, int mask)

> > >  	else if (attr == &dev_attr_act_mask)
> > > -		ret = sprintf(buf, "%#x\n", q->blk_trace->act_mask);
> > > +		ret = blk_trace_mask2str(buf, q->blk_trace->act_mask);


> > > -			value = blk_str2act_mask(buf);
> > > -			if (value < 0)
> > > +			value = blk_trace_str2mask(buf);
> > 
> > Hmm, does this compile? Doesn't blk_trace_str2mask need two parameters?
> 
> No, it needs one parameter.

I'm really confused now. The prototype for blk_trace_str2mask has 
two parameters. It is used with two parameters above, but then it is used 
here with only one parameter. The blk_str2act_mask may have one, and that 
is what is replaced.

What am I missing?

-- Steve

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