linux-kernel - Re: [PATCH] xtensa: Fix execdomain removal

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Message-ID: <20150412144346.GD7215@unpythonic.net>
Date:	Sun, 12 Apr 2015 09:43:46 -0500
From:	Jeff Epler <jepler@...ythonic.net>
To:	Guenter Roeck <linux@...ck-us.net>
Cc:	Richard Weinberger <richard@....at>,
	Chris Zankel <chris@...kel.net>,
	Max Filippov <jcmvbkbc@...il.com>,
	linux-xtensa@...ux-xtensa.org, linux-arch@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] xtensa: Fix execdomain removal

On Sat, Apr 11, 2015 at 07:19:51PM -0700, Guenter Roeck wrote:
> The removal of exexdomain changes pointer offsets into the thread_info
> structure.
...
> -#define TI_EXEC_DOMAIN	 0x00000004
> -#define TI_FLAGS	 0x00000008
> +#define TI_FLAGS	 0x00000004

Hmm.  If these have to be maintained by hand, perhaps they can be
BUILD_BUG_ON'd in some appropriate C file?  e.g.,

    BUILD_BUG_ON(TI_FLAGS != offsetof(struct thread_info, flags));

Jeff
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