The ACPI 6.1 specification was recently released at the end of January
2016, but the arm64 kernel documentation for the use of ACPI was written
for the 5.1 version of the spec. There were significant additions to the
spec that had not yet been mentioned -- for example, the 6.0 mechanisms
added to make it easier to define processors and low power idle states,
as well as the 6.1 addition allowing regular interrupts (not just from
GPIO) be used to signal ACPI general purpose events.
This patch reflects going back through and examining the specs in detail
and updating content appropriately. Whilst there, a few odds and ends of
typos were caught as well. This brings the documentation up to date with
ACPI 6.1 for arm64.
Changes for v5:
-- Miscellaneous typos and corrections (Lorenzo Pieralisi)
-- Add linux-acpi@ ML to the distribution list (Alexey Klimov)
-- Corrections to CPPC information (Alexey Klimov)
-- ACK from Lorenzo Pieralisi
-- Updated bibliographic info (Al Stone)
Changes for v4:
-- Clarify that IORT can sometimes be optional (Jon Masters).
-- Remove "Use as needed" descriptions of ACPI objects; they provide
no substantive information and doing so simplifies maintenance of
this document over time. These have been replaced with a simpler
notice that states that unless otherwise noted, do what the ACPI
specification says is needed.
-- Corrected the _OSI object usage recommendation; it described kernel
behavior that does not exist (Al Stone).
Changes for v3:
-- Clarify use of _LPI/_RDI (Vikas Sajjan)
-- Whitespace cleanup as pointed out by checkpatch
Changes for v2:
-- Clean up white space (Harb Abdulhahmid)
-- Clarification on _CCA usage (Harb Abdulhamid)
-- IORT moved to required from recommended (Hanjun Guo)
-- Clarify IORT description (Hanjun Guo)
Al Stone (1):
ARM64: ACPI: Update documentation for latest specification version
Documentation/arm64/acpi_object_usage.txt | 343 ++++++++++++++++--------------
Documentation/arm64/arm-acpi.txt | 40 ++--
2 files changed, 213 insertions(+), 170 deletions(-)
--
2.5.5
Tree/Branch: next-20160526
Git describe: next-20160526
Commit: 71e75a2df0 Add linux-next specific files for 20160526
Build Time: 151 min 55 sec
Passed: 9 / 9 (100.00 %)
Failed: 0 / 9 ( 0.00 %)
Errors: 0
Warnings: 4
Section Mismatches: 0
-------------------------------------------------------------------------------
defconfigs with issues (other than build errors):
4 warnings 0 mismatches : arm64-allmodconfig
-------------------------------------------------------------------------------
Warnings Summary: 4
1 ../fs/reiserfs/ibalance.c:1156:2: warning: 'new_insert_key' may be used uninitialized in this function [-Wmaybe-uninitialized]
1 ../fs/gfs2/dir.c:802:9: warning: 'leaf_no' may be used uninitialized in this function [-Wmaybe-uninitialized]
1 ../fs/gfs2/dir.c:1021:8: warning: 'leaf_no' may be used uninitialized in this function [-Wmaybe-uninitialized]
1 ../drivers/staging/iio/adc/ad7606_spi.c:24:18: warning: 'data' may be used uninitialized in this function [-Wmaybe-uninitialized]
===============================================================================
Detailed per-defconfig build reports below:
-------------------------------------------------------------------------------
arm64-allmodconfig : PASS, 0 errors, 4 warnings, 0 section mismatches
Warnings:
../fs/gfs2/dir.c:802:9: warning: 'leaf_no' may be used uninitialized in this function [-Wmaybe-uninitialized]
../fs/gfs2/dir.c:1021:8: warning: 'leaf_no' may be used uninitialized in this function [-Wmaybe-uninitialized]
../fs/reiserfs/ibalance.c:1156:2: warning: 'new_insert_key' may be used uninitialized in this function [-Wmaybe-uninitialized]
../drivers/staging/iio/adc/ad7606_spi.c:24:18: warning: 'data' may be used uninitialized in this function [-Wmaybe-uninitialized]
-------------------------------------------------------------------------------
Passed with no errors, warnings or mismatches:
arm64-allnoconfig
arm-multi_v5_defconfig
arm-multi_v7_defconfig
x86_64-defconfig
arm-allmodconfig
arm-allnoconfig
x86_64-allnoconfig
arm64-defconfig
close failed in file object destructor:
sys.excepthook is missing
lost sys.stderr
register_page_bootmem_info_node() is invoked in mem_init(), so it will be
called before page_alloc_init_late() if CONFIG_DEFERRED_STRUCT_PAGE_INIT
is enabled. But, pfn_to_nid() depends on memmap which won't be fully setup
until page_alloc_init_late() is done, so replace pfn_to_nid() by
early_pfn_to_nid().
Signed-off-by: Yang Shi <yang.shi(a)linaro.org>
---
mm/memory_hotplug.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c
index caf2a14..b8ee080 100644
--- a/mm/memory_hotplug.c
+++ b/mm/memory_hotplug.c
@@ -300,7 +300,7 @@ void register_page_bootmem_info_node(struct pglist_data *pgdat)
* multiple nodes we check that this pfn does not already
* reside in some other nodes.
*/
- if (pfn_valid(pfn) && (pfn_to_nid(pfn) == node))
+ if (pfn_valid(pfn) && (early_pfn_to_nid(pfn) == node))
register_page_bootmem_info_section(pfn);
}
}
--
2.0.2