linux-kernel - Re: [rfc 0/2] Introducing VmFlags field into smaps output

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Date:	Wed, 24 Oct 2012 10:56:41 +1100
From:	Stephen Rothwell <sfr@...b.auug.org.au>
To:	Peter Zijlstra <a.p.zijlstra@...llo.nl>
Cc:	Cyrill Gorcunov <gorcunov@...nvz.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Pavel Emelyanov <xemul@...allels.com>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [rfc 0/2] Introducing VmFlags field into smaps output

On Wed, 24 Oct 2012 00:32:54 +0200 Peter Zijlstra <a.p.zijlstra@...llo.nl> wrote:
>
> On Wed, 2012-10-24 at 01:59 +0400, Cyrill Gorcunov wrote:
> >                 [ilog2(VM_WRITE)]       = { {'w', 'r'} },
> 
> since we're being awfully positive about crazy late night ideas, how
> about something like:
> 
> #define MNEM(_VM, _mn) [ilog2(_VM)] = {(const char [2]){_mn}}
> 
> 	MNEM(VM_WRITE, "wr"),

The C standard and gcc allow you to initialise the 2 character array with
a (>=2 character) string literal with no casting, so

#define MNEM(_VM, _mn) [ilog2(_VM)] = {_mn}

should work.

[ and the the earlier version, 

[ilog2(VM_READ)]	= { "rd" },

etc, does work. ]

-- 
Cheers,
Stephen Rothwell                    sfr@...b.auug.org.au

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