The patch titled
Subject: mm/sparse.c: move subsection_map related functions together
has been added to the -mm tree. Its filename is
mm-sparsec-move-subsection_map-related-functions-together.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/mm-sparsec-move-subsection_map-related-functions-together.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/mm-sparsec-move-subsection_map-related-functions-together.patch
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The -mm tree is included into linux-next and is updated
there every 3-4 working days
------------------------------------------------------
From: Baoquan He <bhe@xxxxxxxxxx>
Subject: mm/sparse.c: move subsection_map related functions together
No functional change.
Link: http://lkml.kernel.org/r/20200312124414.439-6-bhe@xxxxxxxxxx
Signed-off-by: Baoquan He <bhe@xxxxxxxxxx>
Cc: Michal Hocko <mhocko@xxxxxxxx>
Cc: David Hildenbrand <david@xxxxxxxxxx>
Cc: Wei Yang <richard.weiyang@xxxxxxxxx>
Cc: Dan Williams <dan.j.williams@xxxxxxxxx>
Cc: Pankaj Gupta <pankaj.gupta.linux@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/sparse.c | 132 ++++++++++++++++++++++++--------------------------
1 file changed, 64 insertions(+), 68 deletions(-)
--- a/mm/sparse.c~mm-sparsec-move-subsection_map-related-functions-together
+++ a/mm/sparse.c
@@ -244,10 +244,74 @@ void __init subsection_map_init(unsigned
nr_pages -= pfns;
}
}
+
+static int clear_subsection_map(unsigned long pfn, unsigned long nr_pages)
+{
+ DECLARE_BITMAP(map, SUBSECTIONS_PER_SECTION) = { 0 };
+ DECLARE_BITMAP(tmp, SUBSECTIONS_PER_SECTION) = { 0 };
+ struct mem_section *ms = __pfn_to_section(pfn);
+ unsigned long *subsection_map = ms->usage
+ ? &ms->usage->subsection_map[0] : NULL;
+
+ subsection_mask_set(map, pfn, nr_pages);
+ if (subsection_map)
+ bitmap_and(tmp, map, subsection_map, SUBSECTIONS_PER_SECTION);
+
+ if (WARN(!subsection_map || !bitmap_equal(tmp, map, SUBSECTIONS_PER_SECTION),
+ "section already deactivated (%#lx + %ld)\n",
+ pfn, nr_pages))
+ return -EINVAL;
+
+ bitmap_xor(subsection_map, map, subsection_map, SUBSECTIONS_PER_SECTION);
+ return 0;
+}
+
+static bool is_subsection_map_empty(struct mem_section *ms)
+{
+ return bitmap_empty(&ms->usage->subsection_map[0],
+ SUBSECTIONS_PER_SECTION);
+}
+
+static int fill_subsection_map(unsigned long pfn, unsigned long nr_pages)
+{
+ struct mem_section *ms = __pfn_to_section(pfn);
+ DECLARE_BITMAP(map, SUBSECTIONS_PER_SECTION) = { 0 };
+ unsigned long *subsection_map;
+ int rc = 0;
+
+ subsection_mask_set(map, pfn, nr_pages);
+
+ subsection_map = &ms->usage->subsection_map[0];
+
+ if (bitmap_empty(map, SUBSECTIONS_PER_SECTION))
+ rc = -EINVAL;
+ else if (bitmap_intersects(map, subsection_map, SUBSECTIONS_PER_SECTION))
+ rc = -EEXIST;
+ else
+ bitmap_or(subsection_map, map, subsection_map,
+ SUBSECTIONS_PER_SECTION);
+
+ return rc;
+}
#else
void __init subsection_map_init(unsigned long pfn, unsigned long nr_pages)
{
}
+
+static int clear_subsection_map(unsigned long pfn, unsigned long nr_pages)
+{
+ return 0;
+}
+
+static bool is_subsection_map_empty(struct mem_section *ms)
+{
+ return true;
+}
+
+static int fill_subsection_map(unsigned long pfn, unsigned long nr_pages)
+{
+ return 0;
+}
#endif
/* Record a memory area against a node. */
@@ -711,45 +775,6 @@ static void free_map_bootmem(struct page
}
#endif /* CONFIG_SPARSEMEM_VMEMMAP */
-#ifdef CONFIG_SPARSEMEM_VMEMMAP
-static int clear_subsection_map(unsigned long pfn, unsigned long nr_pages)
-{
- DECLARE_BITMAP(map, SUBSECTIONS_PER_SECTION) = { 0 };
- DECLARE_BITMAP(tmp, SUBSECTIONS_PER_SECTION) = { 0 };
- struct mem_section *ms = __pfn_to_section(pfn);
- unsigned long *subsection_map = ms->usage
- ? &ms->usage->subsection_map[0] : NULL;
-
- subsection_mask_set(map, pfn, nr_pages);
- if (subsection_map)
- bitmap_and(tmp, map, subsection_map, SUBSECTIONS_PER_SECTION);
-
- if (WARN(!subsection_map || !bitmap_equal(tmp, map, SUBSECTIONS_PER_SECTION),
- "section already deactivated (%#lx + %ld)\n",
- pfn, nr_pages))
- return -EINVAL;
-
- bitmap_xor(subsection_map, map, subsection_map, SUBSECTIONS_PER_SECTION);
- return 0;
-}
-
-static bool is_subsection_map_empty(struct mem_section *ms)
-{
- return bitmap_empty(&ms->usage->subsection_map[0],
- SUBSECTIONS_PER_SECTION);
-}
-#else
-static int clear_subsection_map(unsigned long pfn, unsigned long nr_pages)
-{
- return 0;
-}
-
-static bool is_subsection_map_empty(struct mem_section *ms)
-{
- return true;
-}
-#endif
-
/*
* To deactivate a memory region, there are 3 cases to handle across
* two configurations (SPARSEMEM_VMEMMAP={y,n}):
@@ -804,35 +829,6 @@ static void section_deactivate(unsigned
ms->section_mem_map = (unsigned long)NULL;
}
-#ifdef CONFIG_SPARSEMEM_VMEMMAP
-static int fill_subsection_map(unsigned long pfn, unsigned long nr_pages)
-{
- struct mem_section *ms = __pfn_to_section(pfn);
- DECLARE_BITMAP(map, SUBSECTIONS_PER_SECTION) = { 0 };
- unsigned long *subsection_map;
- int rc = 0;
-
- subsection_mask_set(map, pfn, nr_pages);
-
- subsection_map = &ms->usage->subsection_map[0];
-
- if (bitmap_empty(map, SUBSECTIONS_PER_SECTION))
- rc = -EINVAL;
- else if (bitmap_intersects(map, subsection_map, SUBSECTIONS_PER_SECTION))
- rc = -EEXIST;
- else
- bitmap_or(subsection_map, map, subsection_map,
- SUBSECTIONS_PER_SECTION);
-
- return rc;
-}
-#else
-static int fill_subsection_map(unsigned long pfn, unsigned long nr_pages)
-{
- return 0;
-}
-#endif
-
static struct page * __meminit section_activate(int nid, unsigned long pfn,
unsigned long nr_pages, struct vmem_altmap *altmap)
{
_
Patches currently in -mm which might be from bhe@xxxxxxxxxx are
mm-hotplug-fix-hot-remove-failure-in-sparsememvmemmap-case.patch
mm-sparsec-use-kvmalloc_node-kvfree-to-alloc-free-memmap-for-the-classic-sparse.patch
mm-hotplug-only-respect-mem=-parameter-during-boot-stage.patch
mm-sparsec-introduce-new-function-fill_subsection_map.patch
mm-sparsec-introduce-a-new-function-clear_subsection_map.patch
mm-sparsec-only-use-subsection-map-in-vmemmap-case.patch
mm-sparsec-add-note-about-only-vmemmap-supporting-sub-section-hotplug.patch
mm-sparsec-move-subsection_map-related-functions-together.patch
