Replace homemade hamming weight function with hweight8() and hweight16().
Signed-off-by: Akinobu Mita <akinobu.mita@xxxxxxxxx>
Cc: Len Brown <lenb@xxxxxxxxxx>
Cc: Rafael J. Wysocki <rjw@xxxxxxx>
Cc: linux-acpi@xxxxxxxxxxxxxxx
---
drivers/acpi/acpica/rscalc.c | 36 ++----------------------------------
1 file changed, 2 insertions(+), 34 deletions(-)
diff --git a/drivers/acpi/acpica/rscalc.c b/drivers/acpi/acpica/rscalc.c
index de12469..bdddb7d 100644
--- a/drivers/acpi/acpica/rscalc.c
+++ b/drivers/acpi/acpica/rscalc.c
@@ -49,9 +49,6 @@
#define _COMPONENT ACPI_RESOURCES
ACPI_MODULE_NAME("rscalc")
-/* Local prototypes */
-static u8 acpi_rs_count_set_bits(u16 bit_field);
-
static acpi_rs_length
acpi_rs_struct_option_length(struct acpi_resource_source *resource_source);
@@ -60,35 +57,6 @@ acpi_rs_stream_option_length(u32 resource_length, u32 minimum_total_length);
/*******************************************************************************
*
- * FUNCTION: acpi_rs_count_set_bits
- *
- * PARAMETERS: bit_field - Field in which to count bits
- *
- * RETURN: Number of bits set within the field
- *
- * DESCRIPTION: Count the number of bits set in a resource field. Used for
- * (Short descriptor) interrupt and DMA lists.
- *
- ******************************************************************************/
-
-static u8 acpi_rs_count_set_bits(u16 bit_field)
-{
- u8 bits_set;
-
- ACPI_FUNCTION_ENTRY();
-
- for (bits_set = 0; bit_field; bits_set++) {
-
- /* Zero the least significant bit that is set */
-
- bit_field &= (u16) (bit_field - 1);
- }
-
- return bits_set;
-}
-
-/*******************************************************************************
- *
* FUNCTION: acpi_rs_struct_option_length
*
* PARAMETERS: resource_source - Pointer to optional descriptor field
@@ -439,7 +407,7 @@ acpi_rs_get_list_length(u8 * aml_buffer,
* Get the number of bits set in the 16-bit IRQ mask
*/
ACPI_MOVE_16_TO_16(&temp16, buffer);
- extra_struct_bytes = acpi_rs_count_set_bits(temp16);
+ extra_struct_bytes = hweight16(temp16);
break;
case ACPI_RESOURCE_NAME_DMA:
@@ -447,7 +415,7 @@ acpi_rs_get_list_length(u8 * aml_buffer,
* DMA Resource:
* Get the number of bits set in the 8-bit DMA mask
*/
- extra_struct_bytes = acpi_rs_count_set_bits(*buffer);
+ extra_struct_bytes = hweight8(*buffer);
break;
case ACPI_RESOURCE_NAME_VENDOR_SMALL:
--
1.7.11.7
--
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