mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-26 19:00:25 +00:00
ACPI: processor: idle: Only flush cache on entering C3
According to ACPI 6.4, Section 8.2, CPU cache flushing required on entering the C3 power state. Avoid flushing the cache on entering other C-states. Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> [ rjw: Changelog edits ] Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
parent
0e6078c3c6
commit
87ebbb8c61
1 changed files with 2 additions and 1 deletions
|
@ -565,7 +565,8 @@ static int acpi_idle_play_dead(struct cpuidle_device *dev, int index)
|
|||
{
|
||||
struct acpi_processor_cx *cx = per_cpu(acpi_cstate[index], dev->cpu);
|
||||
|
||||
ACPI_FLUSH_CPU_CACHE();
|
||||
if (cx->type == ACPI_STATE_C3)
|
||||
ACPI_FLUSH_CPU_CACHE();
|
||||
|
||||
while (1) {
|
||||
|
||||
|
|
Loading…
Reference in a new issue