linux-kernel - [ 25/65] ACPI processor: Fix tick_broadcast

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Date:	Mon, 13 Aug 2012 15:14:09 -0700
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:	Greg KH <gregkh@...uxfoundation.org>,
	torvalds@...ux-foundation.org, akpm@...ux-foundation.org,
	alan@...rguk.ukuu.org.uk, Feng Tang <feng.tang@...el.com>,
	Thomas Renninger <trenn@...e.de>,
	"Rafael J. Wysocki" <rjw@...k.pl>,
	Deepthi Dharwar <deepthi@...ux.vnet.ibm.com>,
	Len Brown <len.brown@...el.com>
Subject: [ 25/65] ACPI processor: Fix tick_broadcast_mask online/offline regression

From: Greg KH <gregkh@...uxfoundation.org>

3.4-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Feng Tang <feng.tang@...el.com>

commit b7db60f45d74497c723dc7ae1370cf0b37dfb0d8 upstream.

In commit 99b725084 "ACPI processor hotplug: Delay acpi_processor_start()
call for hotplugged cores", acpi_processor_hotplug(pr) was wrongly replaced
by acpi_processor_cst_has_changed() inside the acpi_cpu_soft_notify(). This
patch will restore it back, fixing the tick_broadcast_mask regression:
	https://lkml.org/lkml/2012/7/30/169

Signed-off-by: Feng Tang <feng.tang@...el.com>
Cc: Thomas Renninger <trenn@...e.de>
Reviewed-by: Rafael J. Wysocki <rjw@...k.pl>
Reviewed-by: Deepthi Dharwar <deepthi@...ux.vnet.ibm.com>
Signed-off-by: Len Brown <len.brown@...el.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/acpi/processor_driver.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/acpi/processor_driver.c
+++ b/drivers/acpi/processor_driver.c
@@ -442,7 +442,7 @@ static int acpi_cpu_soft_notify(struct n
 		/* Normal CPU soft online event */
 		} else {
 			acpi_processor_ppc_has_changed(pr, 0);
-			acpi_processor_cst_has_changed(pr);
+			acpi_processor_hotplug(pr);
 			acpi_processor_reevaluate_tstate(pr, action);
 			acpi_processor_tstate_has_changed(pr);
 		}


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