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authorKonrad Rzeszutek Wilk <konrad.wilk@oracle.com>2013-01-15 22:40:26 -0500
committerKonrad Rzeszutek Wilk <konrad.wilk@oracle.com>2013-01-15 22:41:27 -0500
commitd55bf532d72b3cfdfe84e696ace995067324c96c (patch)
tree8d4bc8b87dbbb92a16dbd92ce6ba266ff88293db
parent1affa98d23c0188fdd4433512489be753a25bb23 (diff)
downloadlinaro-lsk-d55bf532d72b3cfdfe84e696ace995067324c96c.tar.gz
Revert "xen/smp: Fix CPU online/offline bug triggering a BUG: scheduling while atomic."
This reverts commit 41bd956de3dfdc3a43708fe2e0c8096c69064a1e. The fix is incorrect and not appropiate for the latest kernels. In fact it _causes_ the BUG: scheduling while atomic while doing vCPU hotplug. Suggested-by: Wei Liu <wei.liu2@citrix.com> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
-rw-r--r--arch/x86/xen/smp.c7
1 files changed, 0 insertions, 7 deletions
diff --git a/arch/x86/xen/smp.c b/arch/x86/xen/smp.c
index 4f7d2599b48..34bc4cee888 100644
--- a/arch/x86/xen/smp.c
+++ b/arch/x86/xen/smp.c
@@ -432,13 +432,6 @@ static void __cpuinit xen_play_dead(void) /* used only with HOTPLUG_CPU */
play_dead_common();
HYPERVISOR_vcpu_op(VCPUOP_down, smp_processor_id(), NULL);
cpu_bringup();
- /*
- * Balance out the preempt calls - as we are running in cpu_idle
- * loop which has been called at bootup from cpu_bringup_and_idle.
- * The cpucpu_bringup_and_idle called cpu_bringup which made a
- * preempt_disable() So this preempt_enable will balance it out.
- */
- preempt_enable();
}
#else /* !CONFIG_HOTPLUG_CPU */