path: root/arch/ia64
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authorLen Brown <len.brown@intel.com>2011-01-07 01:46:40 +0100
committerLen Brown <len.brown@intel.com>2011-01-07 01:04:19 -0500
commit6d5bbf00d251cc73223a71422d69e069dc2e0b8d (patch)
tree78088b56bbc95caff8cfa574941710e0c065b596 /arch/ia64
parentca9b600be38c73b7d25acfb8b7e4e9a9e941d881 (diff)
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>
Diffstat (limited to 'arch/ia64')
1 files changed, 5 insertions, 0 deletions
diff --git a/arch/ia64/include/asm/io.h b/arch/ia64/include/asm/io.h
index cc8335eb311..e5a6c3530c6 100644
--- a/arch/ia64/include/asm/io.h
+++ b/arch/ia64/include/asm/io.h
@@ -426,6 +426,11 @@ extern void __iomem * ioremap_nocache (unsigned long offset, unsigned long size)
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: