The patch titled
Subject: mm/sparse: add common helper to mark all memblocks present
has been added to the -mm tree. Its filename is
mm-sparse-add-common-helper-to-mark-all-memblocks-present.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/mm-sparse-add-common-helper-to-mark-all-memblocks-present.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/mm-sparse-add-common-helper-to-mark-all-memblocks-present.patch
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------------------------------------------------------
From: Logan Gunthorpe <logang@xxxxxxxxxxxx>
Subject: mm/sparse: add common helper to mark all memblocks present
Presently the arches arm64, arm and sh have a function which loops through
each memblock and calls memory present. riscv will require a similar
function.
Introduce a common memblocks_present() function that can be used by
all the arches. Subsequent patches will cleanup the arches that
make use of this.
Link: http://lkml.kernel.org/r/20181107205433.3875-3-logang@xxxxxxxxxxxx
Signed-off-by: Logan Gunthorpe <logang@xxxxxxxxxxxx>
Acked-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Cc: Michal Hocko <mhocko@xxxxxxxx>
Cc: Vlastimil Babka <vbabka@xxxxxxx>
Cc: Oscar Salvador <osalvador@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
include/linux/mmzone.h | 6 ++++++
mm/sparse.c | 16 ++++++++++++++++
2 files changed, 22 insertions(+)
--- a/include/linux/mmzone.h~mm-sparse-add-common-helper-to-mark-all-memblocks-present
+++ a/include/linux/mmzone.h
@@ -783,6 +783,12 @@ void memory_present(int nid, unsigned lo
static inline void memory_present(int nid, unsigned long start, unsigned long end) {}
#endif
+#if defined(CONFIG_SPARSEMEM)
+void memblocks_present(void);
+#else
+static inline void memblocks_present(void) {}
+#endif
+
#ifdef CONFIG_HAVE_MEMORYLESS_NODES
int local_memory_node(int node_id);
#else
--- a/mm/sparse.c~mm-sparse-add-common-helper-to-mark-all-memblocks-present
+++ a/mm/sparse.c
@@ -240,6 +240,22 @@ void __init memory_present(int nid, unsi
}
/*
+ * Mark all memblocks as present using memory_present(). This is a
+ * convienence function that is useful for a number of arches
+ * to mark all of the systems memory as present during initialization.
+ */
+void __init memblocks_present(void)
+{
+ struct memblock_region *reg;
+
+ for_each_memblock(memory, reg) {
+ memory_present(memblock_get_region_node(reg),
+ memblock_region_memory_base_pfn(reg),
+ memblock_region_memory_end_pfn(reg));
+ }
+}
+
+/*
* Subtle, we encode the real pfn into the mem_map such that
* the identity pfn - section_mem_map will return the actual
* physical page frame number.
_
Patches currently in -mm which might be from logang@xxxxxxxxxxxx are
mm-introduce-common-struct_page_max_shift-define.patch
mm-sparse-add-common-helper-to-mark-all-memblocks-present.patch
