perfcounters: restructure x86 counter math

Impact: restructure code

Change counter math from absolute values to clear delta logic.

We try to extract elapsed deltas from the raw hw counter - and put
that into the generic counter.

Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 1 insertions, 1 deletions

diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index f2fdc1867241..fe94490bab61 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -643,7 +643,7 @@ config X86_UP_IOAPIC
 config X86_LOCAL_APIC
         def_bool y
         depends on X86_64 || (X86_32 && (X86_UP_APIC || (SMP && !X86_VOYAGER) || X86_GENERICARCH))
-        select HAVE_PERF_COUNTERS
+        select HAVE_PERF_COUNTERS if (!M386 && !M486)
 
 config X86_IO_APIC
         def_bool y