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List:       linaro-mm-sig
Subject:    [Linaro-mm-sig] [PATCH v5 2/7] mutex: add support for wound/wait style locks, v5
From:       mingo () kernel ! org (Ingo Molnar)
Date:       2013-06-20 12:23:55
Message-ID: 20130620122355.GA15814 () gmail ! com
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* Maarten Lankhorst <maarten.lankhorst at canonical.com> wrote:

> Well they've helped me with some of the changes and contributed some 
> code and/or fixes, but if acked-by is preferred I'll use that..

Such contributions can be credited in the changelog, and/or copyright 
notices, and/or the code itself. The signoff chain on the other hand is 
strictly defined as a 'route the patch took', with a single point of 
origin, the main author. See Documentation/SubmittingPatches, pt 12.

[ A signoff chain _can_ signal multi-authored code where the code got 
  written by someone and then further fixed/developed by someone else - 
  who adds a SOB to the end - but in that case I expect to get the patch 
  from the last person in the signoff chain. ]

Thanks,

	Ingo


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