Commit 53d01e20 authored by Kirill A. Shutemov's avatar Kirill A. Shutemov Committed by Rafael J. Wysocki
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ACPI: PM: Avoid CPU cache flush when entering S4 



According to ACPI 6.4, Section 16.2, the CPU cache flushing is
required on entering to S1, S2, and S3.

No need to flush the caches during hibernation (S4).

Signed-off-by: default avatarKirill A. Shutemov <kirill.shutemov@linux.intel.com>
[ rjw: Subject and changelog edits ]
Signed-off-by: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
parent 0fcfb00b

drivers/acpi/sleep.c

+0 −2
Original line number Diff line number Diff line
@@ -903,8 +903,6 @@ static int acpi_hibernation_enter(void) 
{

	acpi_status status = AE_OK;



	ACPI_FLUSH_CPU_CACHE();



	/* This shouldn't return.  If it returns, we have a problem */

	status = acpi_enter_sleep_state(ACPI_STATE_S4);

	/* Reprogram control registers */