diff options
| author | Ingo Molnar <mingo@elte.hu> | 2009-05-14 05:16:59 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-05-15 09:47:07 +0200 |
| commit | 251e8e3c7235f5944805a64f24c79fc4696793f1 (patch) | |
| tree | 8e171cd075aa20432f7c4a03e88deaf2f3f32b49 /drivers | |
| parent | perf_counter: x86: Protect against infinite loops in intel_pmu_handle_irq() (diff) | |
| download | linux-251e8e3c7235f5944805a64f24c79fc4696793f1.tar.xz linux-251e8e3c7235f5944805a64f24c79fc4696793f1.zip | |
perf_counter: Remove ACPI quirk
We had a disable/enable around acpi_idle_do_entry() due to an erratum
in an early prototype CPU i had access to. That erratum has been fixed
in the BIOS so remove the quirk.
The quirk also kept us from profiling interrupts that hit the ACPI idle
instruction - so this is an improvement as well, beyond a cleanup and
a micro-optimization.
[ Impact: improve profiling scope, cleanup, micro-optimization ]
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
LKML-Reference: <new-submission>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/acpi/processor_idle.c | 2 |
1 files changed, 0 insertions, 2 deletions
diff --git a/drivers/acpi/processor_idle.c b/drivers/acpi/processor_idle.c index 9645758c0472..f7ca8c55956b 100644 --- a/drivers/acpi/processor_idle.c +++ b/drivers/acpi/processor_idle.c @@ -765,7 +765,6 @@ static inline void acpi_idle_do_entry(struct acpi_processor_cx *cx) { /* Don't trace irqs off for idle */ stop_critical_timings(); - perf_disable(); if (cx->entry_method == ACPI_CSTATE_FFH) { /* Call into architectural FFH based C-state */ acpi_processor_ffh_cstate_enter(cx); @@ -780,7 +779,6 @@ static inline void acpi_idle_do_entry(struct acpi_processor_cx *cx) gets asserted in time to freeze execution properly. */ unused = inl(acpi_gbl_FADT.xpm_timer_block.address); } - perf_enable(); start_critical_timings(); } |