linux-kernel - aligned_{u64,be64,le64} defined in #ifdef __KERNEL_

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Date:	Mon, 30 Aug 2010 03:26:29 +0200
From:	Andreas Gruenbacher <agruen@...e.de>
To:	Eric Paris <eparis@...isplace.org>, netfilter@...r.kernel.org
Cc:	Eric Paris <eparis@...hat.com>, linux-kernel@...r.kernel.org,
	Andreas Schwab <schwab@...hat.com>,
	Tvrtko Ursulin <tvrtko.ursulin@...hos.com>
Subject: aligned_{u64,be64,le64} defined in #ifdef __KERNEL__

On Saturday 28 August 2010 01:51:53 Eric Paris wrote:
> I liked this version until I realized that userspace doesn't have
> aligned_u64 as a valid type.

This looks like an error in include/linux/types.h.  The aligned types should 
probably not be defined inside #ifdef __KERNEL__.

The following other headers expose aligned 64-bit types to user space as well; 
copying the netfilter list:

	include/linux/if_ppp.h
	include/linux/netfilter/nfnetlink_queue.h
	include/linux/netfilter/nfnetlink_log.h
	include/linux/netfilter/xt_quota.h
	include/linux/netfilter/xt_connbytes.h

Otherwise, the definition of those types is really simple, and this would do 
in include/linux/fanotify.h until include/linux/types.h is fixed:

	#ifndef aligned_u64
	# define aligned_u64 __u64 __attribute__((aligned(8)))
	#endif

Thanks,
Andreas
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