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Commit e786db75 authored by Bob Moore's avatar Bob Moore Committed by Len Brown
Browse files

ACPICA: Update math module; no functional change 

Move the 64-bit overlay structures to the utmath module since
they are used nowhere else. Update module comment. ACPICA BZ 829.

http://www.acpica.org/bugzilla/show_bug.cgi?id=829



Signed-off-by: default avatarBob Moore <robert.moore@intel.com>
Signed-off-by: default avatarLin Ming <ming.m.lin@intel.com>
Signed-off-by: default avatarLen Brown <len.brown@intel.com>
parent 28eb3fcf

drivers/acpi/acpica/utmath.c

+20 −3
Original line number Diff line number Diff line
@@ -48,11 +48,27 @@ 
ACPI_MODULE_NAME("utmath")



/*

 * Support for double-precision integer divide.  This code is included here

 * in order to support kernel environments where the double-precision math

 * library is not available.

 * Optional support for 64-bit double-precision integer divide. This code

 * is configurable and is implemented in order to support 32-bit kernel

 * environments where a 64-bit double-precision math library is not available.

 *

 * Support for a more normal 64-bit divide/modulo (with check for a divide-

 * by-zero) appears after this optional section of code.

 */

#ifndef ACPI_USE_NATIVE_DIVIDE

/* Structures used only for 64-bit divide */

typedef struct uint64_struct {

	u32 lo;

	u32 hi;



} uint64_struct;



typedef union uint64_overlay {

	u64 full;

	struct uint64_struct part;



} uint64_overlay;



/*******************************************************************************

 *

 * FUNCTION:    acpi_ut_short_divide
@@ -69,6 +85,7 @@ ACPI_MODULE_NAME("utmath") 
 *              32-bit remainder.

 *

 ******************************************************************************/



acpi_status

acpi_ut_short_divide(u64 dividend,

		     u32 divisor, u64 *out_quotient, u32 *out_remainder)

include/acpi/actypes.h

+0 −10
Original line number Diff line number Diff line
@@ -378,16 +378,6 @@ typedef void *acpi_handle; /* Actually a ptr to a NS Node */ 
typedef u8 acpi_owner_id;

#define ACPI_OWNER_ID_MAX               0xFF



struct uint64_struct {

	u32 lo;

	u32 hi;

};



union uint64_overlay {

	u64 full;

	struct uint64_struct part;

};



#define ACPI_INTEGER_BIT_SIZE           64

#define ACPI_MAX_DECIMAL_DIGITS         20	/* 2^64 = 18,446,744,073,709,551,616 */