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perfcounters: fix acpi_idle_do_entry() workaround 

Fix merge error in drivers/acpi/processor_idle.c. This
resulted in non-working perfcounters on certain Nehalem
systems.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Ingo Molnar 2009-02-16 15:32:23 +01:00
parent 73ca2f8380
commit 37a2542425
1 changed files with 0 additions and 4 deletions
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4
drivers/acpi/processor_idle.c
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@ -826,12 +826,9 @@ static inline void acpi_idle_do_entry(struct acpi_processor_cx *cx)
{
u64 perf_flags;
u64 pctrl;
/* Don't trace irqs off for idle */
stop_critical_timings();
perf_flags = hw_perf_save_disable();
pctrl = hw_perf_save_disable();
if (cx->entry_method == ACPI_CSTATE_FFH) {
/* Call into architectural FFH based C-state */
acpi_processor_ffh_cstate_enter(cx);
@ -847,7 +844,6 @@ static inline void acpi_idle_do_entry(struct acpi_processor_cx *cx)
unused = inl(acpi_gbl_FADT.xpm_timer_block.address);
}
hw_perf_restore(perf_flags);
hw_perf_restore(pctrl);
start_critical_timings();
}