Commit ff600271 authored by Bob Moore's avatar Bob Moore Committed by Rafael J. Wysocki
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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: default avatarBob Moore <robert.moore@intel.com>
Signed-off-by: default avatarLv Zheng <lv.zheng@intel.com>
Signed-off-by: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
parent d8da9151

include/acpi/actypes.h

+4 −0
Original line number Diff line number Diff line
@@ -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



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