[PATCH 6/6] ACPI / PM: Do not switch interrupts off/on in acpi_hibernation_enter()

Rafael J. Wysocki
2011-02-07T22:23:52Z

From: Rafael J. Wysocki <rjw@sisk.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@sisk.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;
}