linux-kernel - Re: [RFC][PATCH] printk: Add %pb to print bitmaps

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Message-ID: <1336571049.2527.43.camel@twins>
Date:	Wed, 09 May 2012 15:44:09 +0200
From:	Peter Zijlstra <peterz@...radead.org>
To:	Ingo Molnar <mingo@...nel.org>
Cc:	Igor Mammedov <imammedo@...hat.com>, Jiang Liu <liuj97@...il.com>,
	linux-kernel@...r.kernel.org, pjt@...gle.com, tglx@...utronix.de,
	seto.hidetoshi@...fujitsu.com,
	Andrew Morton <akpm@...ux-foundation.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>
Subject: Re: [RFC][PATCH] printk: Add %pb to print bitmaps

On Wed, 2012-05-09 at 15:36 +0200, Ingo Molnar wrote:
> * Peter Zijlstra <peterz@...radead.org> wrote:
> 
> > @@ -857,15 +860,19 @@ int kptr_restrict __read_mostly;
> >   *       correctness of the format string and va_list arguments.
> >   * - 'K' For a kernel pointer that should be hidden from unprivileged users
> >   * - 'NF' For a netdev_features_t
> > + * - 'b' For a bitmap, consumes 2 args, second is int
> 
> hm, won't the second arg confuse gcc's printf format checker?


Ah, yes, I suppose I could abuse something like %*pb. Let me try that.
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