diff options
| author | Thomas Renninger <trenn@suse.de> | 2010-11-03 17:06:14 +0100 |
|---|---|---|
| committer | Len Brown <len.brown@intel.com> | 2011-01-12 12:47:30 -0500 |
| commit | d18960494f65ca4fa0d67c865aaca99452070d15 (patch) | |
| tree | 93c37d0dd4bf8c254b312f75eb97f54077a9baed /arch/ia64 | |
| parent | d8c216cfa57e8a579f41729cbb88c97835d9ac8d (diff) | |
| download | linux-d18960494f65ca4fa0d67c865aaca99452070d15.tar.bz2 | |
ACPI, intel_idle: Cleanup idle= internal variables
Having four variables for the same thing:
idle_halt, idle_nomwait, force_mwait and boot_option_idle_overrides
is rather confusing and unnecessary complex.
if idle= boot param is passed, only set up one variable:
boot_option_idle_overrides
Introduces following functional changes/fixes:
- intel_idle driver does not register if any idle=xy
boot param is passed.
- processor_idle.c will also not register a cpuidle driver
and get active if idle=halt is passed.
Before a cpuidle driver with one (C1, halt) state got registered
Now the default_idle function will be used which finally uses
the same idle call to enter sleep state (safe_halt()), but
without registering a whole cpuidle driver.
That means idle= param will always avoid cpuidle drivers to register
with one exception (same behavior as before):
idle=nomwait
may still register acpi_idle cpuidle driver, but C1 will not use
mwait, but hlt. This can be a workaround for IO based deeper sleep
states where C1 mwait causes problems.
Signed-off-by: Thomas Renninger <trenn@suse.de>
cc: x86@kernel.org
Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'arch/ia64')
| -rw-r--r-- | arch/ia64/include/asm/processor.h | 5 | ||||
| -rw-r--r-- | arch/ia64/kernel/process.c | 6 |
2 files changed, 4 insertions, 7 deletions
diff --git a/arch/ia64/include/asm/processor.h b/arch/ia64/include/asm/processor.h index 348e44d08ce3..03afe7970748 100644 --- a/arch/ia64/include/asm/processor.h +++ b/arch/ia64/include/asm/processor.h @@ -717,8 +717,9 @@ prefetchw (const void *x) #define spin_lock_prefetch(x) prefetchw(x) extern unsigned long boot_option_idle_override; -extern unsigned long idle_halt; -extern unsigned long idle_nomwait; + +enum idle_boot_override {IDLE_NO_OVERRIDE=0, IDLE_HALT, IDLE_FORCE_MWAIT, + IDLE_NOMWAIT, IDLE_POLL}; #endif /* !__ASSEMBLY__ */ diff --git a/arch/ia64/kernel/process.c b/arch/ia64/kernel/process.c index 16f1c7b04c69..6d33c5cc94f0 100644 --- a/arch/ia64/kernel/process.c +++ b/arch/ia64/kernel/process.c @@ -53,12 +53,8 @@ void (*ia64_mark_idle)(int); -unsigned long boot_option_idle_override = 0; +unsigned long boot_option_idle_override = IDLE_NO_OVERRIDE; EXPORT_SYMBOL(boot_option_idle_override); -unsigned long idle_halt; -EXPORT_SYMBOL(idle_halt); -unsigned long idle_nomwait; -EXPORT_SYMBOL(idle_nomwait); void (*pm_idle) (void); EXPORT_SYMBOL(pm_idle); void (*pm_power_off) (void); |