ACPI: Use ioremap_cache()
Although the temporary boot-time ACPI table mappings
were set up with CPU caching enabled, the permanent table
mappings and AML run-time region memory accesses were
set up with ioremap(), which on x86 is a synonym for
ioremap_nocache().
Changing this to ioremap_cache() improves performance as
seen when accessing the tables via acpidump,
or /sys/firmware/acpi/tables. It should also improve
AML run-time performance.
No change on ia64.
Reported-by: Jack Steiner <steiner@sgi.com>
Signed-off-by: Len Brown <len.brown@intel.com>
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
diff --git a/arch/ia64/include/asm/io.h b/arch/ia64/include/asm/io.h
index cc8335e..e5a6c35 100644
--- a/arch/ia64/include/asm/io.h
+++ b/arch/ia64/include/asm/io.h
@@ -426,6 +426,11 @@
extern void iounmap (volatile void __iomem *addr);
extern void __iomem * early_ioremap (unsigned long phys_addr, unsigned long size);
extern void early_iounmap (volatile void __iomem *addr, unsigned long size);
+static inline void __iomem * ioremap_cache (unsigned long phys_addr, unsigned long size)
+{
+ return ioremap(phys_addr, size);
+}
+
/*
* String version of IO memory access ops: