linux-kernel - Re: [PATCH] staging/android: add flags member to sync ioctl structs

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Date:	Thu, 3 Mar 2016 08:17:14 -0800
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	Gustavo Padovan <gustavo@...ovan.org>
Cc:	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] staging/android: add flags member to sync ioctl structs

On Thu, Mar 03, 2016 at 11:37:17AM -0300, Gustavo Padovan wrote:
> From: Gustavo Padovan <gustavo.padovan@...labora.co.uk>
> 
> Play safe and add flags member to all structs. So we don't need to
> break API or create new IOCTL in the future if new features that requires
> flags arises.
> 
> v2: check if flags are valid (zero, in this case)
> 
> v3: return -EINVAL if flags are not zero'ed
> 
> v4: add padding for 64-bit alignment
> 
> v5: rebase to use only stacked sync_file_info

Why are these vX things here in the changelog?

And you just broke all existing userspace users of this code, why are
you allowed to do that?

not ok...