locking/Documentation: Update locking/mutex-design.txt disadvantages
Fortunately Jason was able to reduce some of the overhead we had introduced in the original rwsem optimistic spinning - an it is now the same size as mutexes. Update the documentation accordingly. Signed-off-by: NDavidlohr Bueso <davidlohr@hp.com> Acked-by: NJason Low <jason.low2@hp.com> Signed-off-by: NPeter Zijlstra <peterz@infradead.org> Cc: aswin@hp.com Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Randy Dunlap <rdunlap@infradead.org> Link: http://lkml.kernel.org/r/1406752916-3341-7-git-send-email-davidlohr@hp.comSigned-off-by: NIngo Molnar <mingo@kernel.org>
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