linux-kernel - Re: [PATCH 3/4] SunRPC: Use no_printk() for the null dprintk() and dfprintk()

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Date:	Thu, 26 Sep 2013 16:42:47 +0100
From:	David Howells <dhowells@...hat.com>
To:	Joe Perches <joe@...ches.com>
Cc:	dhowells@...hat.com, bfields@...ldses.org,
	Trond.Myklebust@...app.com, olof@...om.net,
	linux-nfs@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 3/4] SunRPC: Use no_printk() for the null dprintk() and dfprintk()

Joe Perches <joe@...ches.com> wrote:

> No code is eliminated by the preprocessor
> with the #define I suggest.

Sorry, I misunderstood.  I assumed you meant comparing to:

	#ifdef RPC_DEBUG
	#define dfprintk(...) ...
	#else
	#define dfprintk(...) do {} while(0)
	#endif

sort of thing which would certainly eliminate code in cpp.

So, yes, you're right.  So I shouldn't need to put the

	ifdebug(FACILITY) { ... }

clauses into the code as the function calls in the argument list will be
behind the if-statement anyway.

David
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