From: Benjamin LaHaise <bcrl@kvack.org>
Date: Sun, 11 Jan 2009 04:00:22 +0000 (-0500)
Subject: x86-64: remove locked instruction from switch_to()
X-Git-Tag: v2.6.30-rc1~211^2~26^2~2^2~166^2~1
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=7106a5ab89c50c6b5aadea0850b40323804a922d;p=pandora-kernel.git

x86-64: remove locked instruction from switch_to()

Impact: micro-optimization

The patch below removes an unnecessary locked instruction from
switch_to().  TIF_FORK is only ever set in copy_thread() on initial
process creation, and gets cleared during the first scheduling of the
process.  As such, it is safe to use an unlocked test for the flag
within switch_to().

Signed-off-by: Benjamin LaHaise <bcrl@kvack.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
---

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