From: Gautham R Shenoy <ego@in.ibm.com>
Date: Wed, 9 May 2007 09:34:04 +0000 (-0700)
Subject: Eliminate lock_cpu_hotplug in kernel/schedc
X-Git-Tag: v2.6.22-rc1~237
X-Git-Url: https://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=5be9361cdff17fc76fa0c3e262ead94158555f16;p=pandora-kernel.git

Eliminate lock_cpu_hotplug in kernel/schedc

Eliminate lock_cpu_hotplug from kernel/sched.c and use sched_hotcpu_mutex
instead to postpone a hotplug event.

In the migration_call hotcpu callback function, take sched_hotcpu_mutex
while handling the event CPU_LOCK_ACQUIRE and release it while handling
CPU_LOCK_RELEASE event.

[akpm@linux-foundation.org: fix deadlock]
Signed-off-by: Gautham R Shenoy <ego@in.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---

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