From: Michel Lespinasse <walken@google.com>
Date: Tue, 7 May 2013 13:45:58 +0000 (-0700)
Subject: rwsem: simplify __rwsem_do_wake
X-Git-Tag: omap-for-v3.10/dt-fixes-for-merge-window~14^2~4
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=8cf5322ce69afea1fab6a6270db24d057d664798;p=pandora-kernel.git

rwsem: simplify __rwsem_do_wake

This is mostly for cleanup value:

- We don't need several gotos to handle the case where the first
  waiter is a writer. Two simple tests will do (and generate very
  similar code).

- In the remainder of the function, we know the first waiter is a reader,
  so we don't have to double check that. We can use do..while loops
  to iterate over the readers to wake (generates slightly better code).

Signed-off-by: Michel Lespinasse <walken@google.com>
Reviewed-by: Peter Hurley <peter@hurleysoftware.com>
Acked-by: Davidlohr Bueso <davidlohr.bueso@hp.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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