linux-kernel - Re: [PATCH v4 1/5] staging/android: add num_fences field to struct sync_file

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Message-ID: <20160301063610.GY32153@mwanda>
Date:	Tue, 1 Mar 2016 09:36:10 +0300
From:	Dan Carpenter <dan.carpenter@...cle.com>
To:	Gustavo Padovan <gustavo@...ovan.org>
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	devel@...verdev.osuosl.org, Rob Clark <robdclark@...il.com>,
	Daniel Stone <daniels@...labora.com>,
	Daniel Vetter <daniel.vetter@...ll.ch>,
	Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
	Riley Andrews <riandrews@...roid.com>,
	dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
	Arve Hjønnevåg <arve@...roid.com>,
	Greg Hackmann <ghackmann@...gle.com>,
	Gustavo Padovan <gustavo.padovan@...labora.co.uk>,
	John Harrison <John.C.Harrison@...el.com>
Subject: Re: [PATCH v4 1/5] staging/android: add num_fences field to struct
 sync_file_info

This breaks userspace.  You used to be able to figure it out from
info->len - sizeof(struct sync_file_info).

regards,
dan carpenter