summaryrefslogtreecommitdiffstats
path: root/include/acpi
diff options
context:
space:
mode:
authorBob Moore <robert.moore@intel.com>2012-10-31 02:27:40 +0000
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2012-11-15 00:31:28 +0100
commitff60027174cf94bab6d4f45ab5c5da1de63b7d1b (patch)
tree22bfe2ea1113c0f4f5510c78ccf21d5960b92dbf /include/acpi
parentd8da9151bb7e2d18624fdd8dbb066419186f0ec1 (diff)
downloadlinux-stable-ff60027174cf94bab6d4f45ab5c5da1de63b7d1b.tar.gz
linux-stable-ff60027174cf94bab6d4f45ab5c5da1de63b7d1b.tar.bz2
linux-stable-ff60027174cf94bab6d4f45ab5c5da1de63b7d1b.zip
ACPICA: Add ACPI_MOVE_NAME macro to optimize 4-byte ACPI_NAME copies
Resolves to a 32-bit move for the normal case, strncpy on machines that do not support misaligned transfers. Signed-off-by: Bob Moore <robert.moore@intel.com> Signed-off-by: Lv Zheng <lv.zheng@intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'include/acpi')
-rw-r--r--include/acpi/actypes.h4
1 files changed, 4 insertions, 0 deletions
diff --git a/include/acpi/actypes.h b/include/acpi/actypes.h
index 1fa6ba123071..d1fb674fd393 100644
--- a/include/acpi/actypes.h
+++ b/include/acpi/actypes.h
@@ -453,10 +453,14 @@ typedef u64 acpi_integer;
#define ACPI_PHYSADDR_TO_PTR(i) ACPI_TO_POINTER(i)
#define ACPI_PTR_TO_PHYSADDR(i) ACPI_TO_INTEGER(i)
+/* Optimizations for 4-character (32-bit) acpi_name manipulation */
+
#ifndef ACPI_MISALIGNMENT_NOT_SUPPORTED
#define ACPI_COMPARE_NAME(a,b) (*ACPI_CAST_PTR (u32, (a)) == *ACPI_CAST_PTR (u32, (b)))
+#define ACPI_MOVE_NAME(dest,src) (*ACPI_CAST_PTR (u32, (dest)) = *ACPI_CAST_PTR (u32, (src)))
#else
#define ACPI_COMPARE_NAME(a,b) (!ACPI_STRNCMP (ACPI_CAST_PTR (char, (a)), ACPI_CAST_PTR (char, (b)), ACPI_NAME_SIZE))
+#define ACPI_MOVE_NAME(dest,src) (ACPI_STRNCPY (ACPI_CAST_PTR (char, (dest)), ACPI_CAST_PTR (char, (src)), ACPI_NAME_SIZE))
#endif
/*******************************************************************************