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[PATCH 21/30] ACPICA: Utilities: Add ACPI_IS_POWER_OF_TWO()

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ACPICA commit cbcb77565c5032dd48e19b3a8a8b8704c5f29faf

This patch adds a macro ACPI_IS_POWER_OF_TWO, which can be used to
detect if a number is a power of two. Lv Zheng.

Link: https://github.com/acpica/acpica/commit/cbcb7756
Signed-off-by: Lv Zheng <lv.zheng@intel.com>
Signed-off-by: Bob Moore <robert.moore@intel.com>
---
 drivers/acpi/acpica/acmacros.h |    4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/acpi/acpica/acmacros.h b/drivers/acpi/acpica/acmacros.h
index 411c18b..b461f55 100644
--- a/drivers/acpi/acpica/acmacros.h
+++ b/drivers/acpi/acpica/acmacros.h
@@ -260,6 +260,10 @@
 
 #define ACPI_IS_MISALIGNED(value)           (((acpi_size) value) & (sizeof(acpi_size)-1))
 
+/* Generic (power-of-two) rounding */
+
+#define ACPI_IS_POWER_OF_TWO(a)             (((a) & ((a) - 1)) == 0)
+
 /*
  * Bitmask creation
  * Bit positions start at zero.
-- 
1.7.10

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[PATCH 00/30] ACPICA: 20160318 Release Lv Zheng <lv.zheng@intel.com> - 2016-03-24 02:40 +0100
  [PATCH 28/30] ACPICA: Events: Fix an issue that _REG association can happen before namespace is initialized Lv Zheng <lv.zheng@intel.com> - 2016-03-24 02:50 +0100
  [PATCH 24/30] ACPICA: Hardware: Add access_width/bit_offset support in acpi_hw_read() Lv Zheng <lv.zheng@intel.com> - 2016-03-24 02:50 +0100
    RE: [PATCH 24/30] ACPICA: Hardware: Add access_width/bit_offset  support in acpi_hw_read() "Zheng, Lv" <lv.zheng@intel.com> - 2016-03-29 10:20 +0200
  [PATCH 21/30] ACPICA: Utilities: Add ACPI_IS_POWER_OF_TWO() Lv Zheng <lv.zheng@intel.com> - 2016-03-24 02:50 +0100
  [PATCH 26/30] ACPICA: Interpreter: Fix wrong conditions for acpi_ev_install_region_handlers() invocation Lv Zheng <lv.zheng@intel.com> - 2016-03-24 02:50 +0100
  [PATCH 17/30] ACPICA: Add support for QNX 6.6 platform Lv Zheng <lv.zheng@intel.com> - 2016-03-24 02:50 +0100
  [PATCH 14/30] ACPICA: iASL: Cleanup/optimization for ToPLD macro support Lv Zheng <lv.zheng@intel.com> - 2016-03-24 02:50 +0100
  [PATCH 29/30] ACPICA: Namespace: Reorder \_SB._INI to make sure it is evaluated before _REG evaluations Lv Zheng <lv.zheng@intel.com> - 2016-03-24 02:50 +0100
  [PATCH 30/30] ACPICA: Update version to 20160318 Lv Zheng <lv.zheng@intel.com> - 2016-03-24 02:50 +0100
  [PATCH 16/30] ACPICA: Headers: Update generation of the ACPICA library Lv Zheng <lv.zheng@intel.com> - 2016-03-24 02:50 +0100
  [PATCH 20/30] ACPICA: iASL/Disassembler: Improve handling of unresolved methods Lv Zheng <lv.zheng@intel.com> - 2016-03-24 02:50 +0100
  [PATCH 19/30] ACPICA: All: const keyword changes across the ACPICA source Lv Zheng <lv.zheng@intel.com> - 2016-03-24 02:50 +0100
  [PATCH 25/30] ACPICA: Hardware: Add access_width/bit_offset support for acpi_hw_write() Lv Zheng <lv.zheng@intel.com> - 2016-03-24 02:50 +0100
  [PATCH 18/30] ACPICA: Utilities: Update for strtoul64 merger Lv Zheng <lv.zheng@intel.com> - 2016-03-24 02:50 +0100
  [PATCH 13/30] ACPICA: Interpreter: Update some function headers, no functional change Lv Zheng <lv.zheng@intel.com> - 2016-03-24 02:50 +0100
  [PATCH 22/30] Utilities: Fix missing parentheses in ACPI_GET_BITS()/ACPI_SET_BITS() Lv Zheng <lv.zheng@intel.com> - 2016-03-24 02:50 +0100
  [PATCH 23/30] ACPICA: Hardware: Enhance acpi_hw_validate_register() with access_width/bit_offset awareness Lv Zheng <lv.zheng@intel.com> - 2016-03-24 02:50 +0100
  [PATCH 15/30] ACPICA: Cleanup some invocation indentations, no functional change Lv Zheng <lv.zheng@intel.com> - 2016-03-24 02:50 +0100
  [PATCH 12/30] ACPICA: Intepreter: Add object extensions to Concatenate operand Lv Zheng <lv.zheng@intel.com> - 2016-03-24 02:50 +0100
  [PATCH 27/30] ACPICA: Tables: Fix wrong MLC condition for dynamic table loading Lv Zheng <lv.zheng@intel.com> - 2016-03-24 02:50 +0100
  [PATCH 06/30] ACPICA: IORT: Add in support for the SMMUv3 subtable Lv Zheng <lv.zheng@intel.com> - 2016-03-24 02:50 +0100
  Re: [PATCH 00/30] ACPICA: 20160318 Release "Rafael J. Wysocki" <rafael@kernel.org> - 2016-03-24 14:10 +0100
    RE: [PATCH 00/30] ACPICA: 20160318 Release "Zheng, Lv" <lv.zheng@intel.com> - 2016-03-28 05:10 +0200

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