linux-kernel - [PATCH 6/6] ACPI / PM: Do not switch interrupts off/on in acpi_hibernation

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Date:	Mon, 7 Feb 2011 23:22:46 +0100
From:	"Rafael J. Wysocki" <rjw@...k.pl>
To:	Len Brown <lenb@...nel.org>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	ACPI Devel Mailing List <linux-acpi@...r.kernel.org>,
	Linux PM mailing list <linux-pm@...ts.linux-foundation.org>,
	Ingo Molnar <mingo@...e.hu>
Subject: [PATCH 6/6] ACPI / PM: Do not switch interrupts off/on in acpi_hibernation_enter()

From: Rafael J. Wysocki <rjw@...k.pl>

The function acpi_hibernation_enter() is always called with
interrupts off, so it doesn't need to switch them off and on.

Signed-off-by: Rafael J. Wysocki <rjw@...k.pl>
---
 drivers/acpi/sleep.c |    3 ---
 1 file changed, 3 deletions(-)

Index: linux-2.6/drivers/acpi/sleep.c
===================================================================
--- linux-2.6.orig/drivers/acpi/sleep.c
+++ linux-2.6/drivers/acpi/sleep.c
@@ -457,16 +457,13 @@ static int acpi_hibernation_begin(void)
 static int acpi_hibernation_enter(void)
 {
 	acpi_status status = AE_OK;
-	unsigned long flags = 0;
 
 	ACPI_FLUSH_CPU_CACHE();
 
-	local_irq_save(flags);
 	/* This shouldn't return.  If it returns, we have a problem */
 	status = acpi_enter_sleep_state(ACPI_STATE_S4);
 	/* Reprogram control registers and execute _BFS */
 	acpi_leave_sleep_state_prep(ACPI_STATE_S4);
-	local_irq_restore(flags);
 
 	return ACPI_SUCCESS(status) ? 0 : -EFAULT;
 }

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