From: Heiko Carstens <heiko.carstens@de.ibm.com>
Date: Fri, 1 Aug 2008 14:39:11 +0000 (+0200)
Subject: [S390] nohz/sclp: disable timer on synchronous waits.
X-Git-Tag: v2.6.27-rc2~113^2~13
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=934b2857cc576ae53c92a66e63fce7ddcfa74691;p=pandora-kernel.git

[S390] nohz/sclp: disable timer on synchronous waits.

sclp_sync_wait wait synchronously for an sclp interrupt and disables
timer interrupts. However on the irq enter paths there is an extra
check if a timer interrupt would be due and calls the timer callback.
This would schedule softirqs in the wrong context.
So introduce local_tick_enable/disable which prevents this.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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