linux-kernel - Re: [PATCH] [v3] x86, pkeys: fix siginfo ABI breakage from new field

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Message-ID: <20160301093317.4afe0268@canb.auug.org.au>
Date:	Tue, 1 Mar 2016 09:33:17 +1100
From:	Stephen Rothwell <sfr@...b.auug.org.au>
To:	Dave Hansen <dave@...1.net>
Cc:	linux-kernel@...r.kernel.org, dave.hansen@...ux.intel.com,
	akpm@...ux-foundation.org, tglx@...utronix.de, mingo@...e.hu,
	hpa@...or.com, peterz@...radead.org, linux-next@...r.kernel.org,
	deller@....de
Subject: Re: [PATCH] [v3] x86, pkeys: fix siginfo ABI breakage from new
 field

Hi Dave,

On Mon, 29 Feb 2016 14:17:33 -0800 Dave Hansen <dave@...1.net> wrote:
>
> To fix this, we replace the u64 with an '__u32'.  The __u32 is
> guaranteed to union well with the pointers from _addr_bnd.  It is
> also plenty large enough to store the 16-bit pkey we have today
> on x86.

That looks better, thanks.

-- 
Cheers,
Stephen Rothwell