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| author | Kirill A. Shutemov <kirill.shutemov@linux.intel.com> | 2021-12-06 15:29:52 +0300 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2021-12-08 16:09:25 +0100 |
| commit | 53d01e2016d77ff647fb2056c39c67df18ee86bf (patch) | |
| tree | 4da4e9219a32e4d34582d7c52c30b122c0a6a98b /drivers/acpi | |
| parent | 0fcfb00b28c0b7884635dacf38e46d60bf3d4eb1 (diff) | |
| download | linux-stable-53d01e2016d77ff647fb2056c39c67df18ee86bf.tar.gz linux-stable-53d01e2016d77ff647fb2056c39c67df18ee86bf.tar.bz2 linux-stable-53d01e2016d77ff647fb2056c39c67df18ee86bf.zip | |
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: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
[ rjw: Subject and changelog edits ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/acpi')
| -rw-r--r-- | drivers/acpi/sleep.c | 2 |
1 files changed, 0 insertions, 2 deletions
diff --git a/drivers/acpi/sleep.c b/drivers/acpi/sleep.c index eaa47753b758..5bcf82fcb5f3 100644 --- a/drivers/acpi/sleep.c +++ b/drivers/acpi/sleep.c @@ -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 */ |