The patch titled
Subject: mm/sparsemem: introduce common definitions for the size and mask of a section
has been added to the -mm tree. Its filename is
mm-sparsemem-introduce-common-definitions-for-the-size-and-mask-of-a-section.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/mm-sparsemem-introduce-common-definitions-for-the-size-and-mask-of-a-section.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/mm-sparsemem-introduce-common-definitions-for-the-size-and-mask-of-a-section.patch
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------------------------------------------------------
From: Dan Williams <dan.j.williams@xxxxxxxxx>
Subject: mm/sparsemem: introduce common definitions for the size and mask of a section
Up-level the local section size and mask from kernel/memremap.c to global
definitions. These will be used by the new sub-section hotplug support.
Link: http://lkml.kernel.org/r/155552634586.2015392.2662168839054356692.stgit@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
Signed-off-by: Dan Williams <dan.j.williams@xxxxxxxxx>
Cc: Michal Hocko <mhocko@xxxxxxxx>
Cc: Vlastimil Babka <vbabka@xxxxxxx>
Cc: Jérôme Glisse <jglisse@xxxxxxxxxx>
Cc: Logan Gunthorpe <logang@xxxxxxxxxxxx>
Cc: David Hildenbrand <david@xxxxxxxxxx>
Cc: Jeff Moyer <jmoyer@xxxxxxxxxx>
Cc: Toshi Kani <toshi.kani@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
include/linux/mmzone.h | 2 ++
kernel/memremap.c | 10 ++++------
mm/hmm.c | 2 --
3 files changed, 6 insertions(+), 8 deletions(-)
--- a/include/linux/mmzone.h~mm-sparsemem-introduce-common-definitions-for-the-size-and-mask-of-a-section
+++ a/include/linux/mmzone.h
@@ -1076,6 +1076,8 @@ static inline unsigned long early_pfn_to
* PFN_SECTION_SHIFT pfn to/from section number
*/
#define PA_SECTION_SHIFT (SECTION_SIZE_BITS)
+#define PA_SECTION_SIZE (1UL << PA_SECTION_SHIFT)
+#define PA_SECTION_MASK (~(PA_SECTION_SIZE-1))
#define PFN_SECTION_SHIFT (SECTION_SIZE_BITS - PAGE_SHIFT)
#define NR_MEM_SECTIONS (1UL << SECTIONS_SHIFT)
--- a/kernel/memremap.c~mm-sparsemem-introduce-common-definitions-for-the-size-and-mask-of-a-section
+++ a/kernel/memremap.c
@@ -14,8 +14,6 @@
#include <linux/hmm.h>
static DEFINE_XARRAY(pgmap_array);
-#define SECTION_MASK ~((1UL << PA_SECTION_SHIFT) - 1)
-#define SECTION_SIZE (1UL << PA_SECTION_SHIFT)
#if IS_ENABLED(CONFIG_DEVICE_PRIVATE)
vm_fault_t device_private_entry_fault(struct vm_area_struct *vma,
@@ -98,8 +96,8 @@ static void devm_memremap_pages_release(
put_page(pfn_to_page(pfn));
/* pages are dead and unused, undo the arch mapping */
- align_start = res->start & ~(SECTION_SIZE - 1);
- align_size = ALIGN(res->start + resource_size(res), SECTION_SIZE)
+ align_start = res->start & ~(PA_SECTION_SIZE - 1);
+ align_size = ALIGN(res->start + resource_size(res), PA_SECTION_SIZE)
- align_start;
nid = page_to_nid(pfn_to_page(align_start >> PAGE_SHIFT));
@@ -160,8 +158,8 @@ void *devm_memremap_pages(struct device
if (!pgmap->ref || !pgmap->kill)
return ERR_PTR(-EINVAL);
- align_start = res->start & ~(SECTION_SIZE - 1);
- align_size = ALIGN(res->start + resource_size(res), SECTION_SIZE)
+ align_start = res->start & ~(PA_SECTION_SIZE - 1);
+ align_size = ALIGN(res->start + resource_size(res), PA_SECTION_SIZE)
- align_start;
align_end = align_start + align_size - 1;
--- a/mm/hmm.c~mm-sparsemem-introduce-common-definitions-for-the-size-and-mask-of-a-section
+++ a/mm/hmm.c
@@ -34,8 +34,6 @@
#include <linux/mmu_notifier.h>
#include <linux/memory_hotplug.h>
-#define PA_SECTION_SIZE (1UL << PA_SECTION_SHIFT)
-
#if IS_ENABLED(CONFIG_HMM_MIRROR)
static const struct mmu_notifier_ops hmm_mmu_notifier_ops;
_
Patches currently in -mm which might be from dan.j.williams@xxxxxxxxx are
init-initialize-jump-labels-before-command-line-option-parsing.patch
mm-sparsemem-introduce-struct-mem_section_usage.patch
mm-sparsemem-introduce-common-definitions-for-the-size-and-mask-of-a-section.patch
mm-sparsemem-add-helpers-track-active-portions-of-a-section-at-boot.patch
mm-hotplug-prepare-shrink_zone-pgdat_span-for-sub-section-removal.patch
mm-sparsemem-convert-kmalloc_section_memmap-to-populate_section_memmap.patch
mm-hotplug-add-mem-hotplug-restrictions-for-remove_memory.patch
mm-kill-is_dev_zone-helper.patch
mm-sparsemem-prepare-for-sub-section-ranges.patch
mm-sparsemem-support-sub-section-hotplug.patch
mm-devm_memremap_pages-enable-sub-section-remap.patch
libnvdimm-pfn-fix-fsdax-mode-namespace-info-block-zero-fields.patch
libnvdimm-pfn-stop-padding-pmem-namespaces-to-section-alignment.patch
mm-shuffle-initial-free-memory-to-improve-memory-side-cache-utilization.patch
mm-shuffle-initial-free-memory-to-improve-memory-side-cache-utilization-fix.patch
mm-move-buddy-list-manipulations-into-helpers.patch
mm-move-buddy-list-manipulations-into-helpers-fix.patch
mm-maintain-randomization-of-page-free-lists.patch
