diff options
| author | Bob Moore | 2009-02-18 08:10:07 +0100 |
|---|---|---|
| committer | Len Brown | 2009-03-26 21:38:30 +0100 |
| commit | 9892dd23cbbfab1f7d4818622296e415979a9c77 (patch) | |
| tree | ae729299168fa2403c7a180da33b8091da51936b /drivers/acpi/processor_idle.c | |
| parent | ACPICA: Formatting update - no functional changes (diff) | |
| download | kernel-qcow2-linux-9892dd23cbbfab1f7d4818622296e415979a9c77.tar.gz kernel-qcow2-linux-9892dd23cbbfab1f7d4818622296e415979a9c77.tar.xz kernel-qcow2-linux-9892dd23cbbfab1f7d4818622296e415979a9c77.zip | |
ACPICA: Optimize ACPI register locking
Removed locking for reads from the ACPI bit registers in PM1
Status, Enable, Control, and PM2 Control. The lock is not required
when reading the single-bit registers. The acpi_get_register_unlocked
function is no longer needed and has been removed. This will
improve performance for reads on these registers. ACPICA BZ 760.
http://www.acpica.org/bugzilla/show_bug.cgi?id=760
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Lin Ming <ming.m.lin@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'drivers/acpi/processor_idle.c')
| -rw-r--r-- | drivers/acpi/processor_idle.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/acpi/processor_idle.c b/drivers/acpi/processor_idle.c index 7bc22a471fe3..6946047d0096 100644 --- a/drivers/acpi/processor_idle.c +++ b/drivers/acpi/processor_idle.c @@ -800,7 +800,7 @@ static int acpi_idle_bm_check(void) { u32 bm_status = 0; - acpi_get_register_unlocked(ACPI_BITREG_BUS_MASTER_STATUS, &bm_status); + acpi_get_register(ACPI_BITREG_BUS_MASTER_STATUS, &bm_status); if (bm_status) acpi_set_register(ACPI_BITREG_BUS_MASTER_STATUS, 1); /* |