From: Venki Pallipadi Date: Thu, 10 Apr 2008 16:49:58 +0000 (-0700) Subject: x86: Simplify cpu_idle_wait X-Git-Tag: v2.6.25-rc9~21 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=783e391b7b5b273cd20856d8f6f4878da8ec31b3;p=pandora-kernel.git x86: Simplify cpu_idle_wait This patch also resolves hangs on boot: http://lkml.org/lkml/2008/2/23/263 http://bugzilla.kernel.org/show_bug.cgi?id=10093 The bug was causing once-in-few-reboots 10-15 sec wait during boot on certain laptops. Earlier commit 40d6a146629b98d8e322b6f9332b182c7cbff3df added smp_call_function in cpu_idle_wait() to kick cpus that are in tickless idle. Looking at cpu_idle_wait code at that time, code seemed to be over-engineered for a case which is rarely used (while changing idle handler). Below is a simplified version of cpu_idle_wait, which just makes a dummy smp_call_function to all cpus, to make them come out of old idle handler and start using the new idle handler. It eliminates code in the idle loop to handle cpu_idle_wait. Signed-off-by: Venkatesh Pallipadi Signed-off-by: Linus Torvalds --- Reading git-diff-tree failed