The patch titled
Subject: mm/memblock: introduce memblock_search_pfn_regions()
has been added to the -mm tree. Its filename is
mm-memblock-introduce-memblock_search_pfn_regions.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/mm-memblock-introduce-memblock_search_pfn_regions.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/mm-memblock-introduce-memblock_search_pfn_regions.patch
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------------------------------------------------------
From: Jia He <jia.he@xxxxxxxxxxxxxxxx>
Subject: mm/memblock: introduce memblock_search_pfn_regions()
This helper is to find the memory region index of input pfn.
Link: http://lkml.kernel.org/r/1530867675-9018-5-git-send-email-hejianet@xxxxxxxxx
Signed-off-by: Jia He <jia.he@xxxxxxxxxxxxxxxx>
Cc: AKASHI Takahiro <takahiro.akashi@xxxxxxxxxx>
Cc: Andrey Ryabinin <aryabinin@xxxxxxxxxxxxx>
Cc: Ard Biesheuvel <ard.biesheuvel@xxxxxxxxxx>
Cc: Catalin Marinas <catalin.marinas@xxxxxxx>
Cc: Daniel Jordan <daniel.m.jordan@xxxxxxxxxx>
Cc: Daniel Vacek <neelx@xxxxxxxxxx>
Cc: Eugeniu Rosca <erosca@xxxxxxxxxxxxxx>
Cc: Gioh Kim <gi-oh.kim@xxxxxxxxxxxxxxxx>
Cc: James Morse <james.morse@xxxxxxx>
Cc: Johannes Weiner <hannes@xxxxxxxxxxx>
Cc: Kees Cook <keescook@xxxxxxxxxxxx>
Cc: Kemi Wang <kemi.wang@xxxxxxxxx>
Cc: Laura Abbott <labbott@xxxxxxxxxx>
Cc: Mark Rutland <mark.rutland@xxxxxxx>
Cc: Mel Gorman <mgorman@xxxxxxx>
Cc: Michal Hocko <mhocko@xxxxxxxx>
Cc: Nikolay Borisov <nborisov@xxxxxxxx>
Cc: Pavel Tatashin <pasha.tatashin@xxxxxxxxxx>
Cc: Petr Tesarik <ptesarik@xxxxxxxx>
Cc: Philip Derrin <philip@cog.systems>
Cc: Russell King <linux@xxxxxxxxxxxxxxx>
Cc: Steve Capper <steve.capper@xxxxxxx>
Cc: Vladimir Murzin <vladimir.murzin@xxxxxxx>
Cc: Vlastimil Babka <vbabka@xxxxxxx>
Cc: Wei Yang <richard.weiyang@xxxxxxxxx>
Cc: Will Deacon <will.deacon@xxxxxxx>
Cc: YASUAKI ISHIMATSU <yasu.isimatu@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
include/linux/memblock.h | 2 ++
mm/memblock.c | 9 +++++++++
2 files changed, 11 insertions(+)
diff -puN include/linux/memblock.h~mm-memblock-introduce-memblock_search_pfn_regions include/linux/memblock.h
--- a/include/linux/memblock.h~mm-memblock-introduce-memblock_search_pfn_regions
+++ a/include/linux/memblock.h
@@ -203,6 +203,8 @@ void __next_mem_pfn_range(int *idx, int
i >= 0; __next_mem_pfn_range(&i, nid, p_start, p_end, p_nid))
#endif /* CONFIG_HAVE_MEMBLOCK_NODE_MAP */
+int memblock_search_pfn_regions(unsigned long pfn);
+
/**
* for_each_free_mem_range - iterate through free memblock areas
* @i: u64 used as loop variable
diff -puN mm/memblock.c~mm-memblock-introduce-memblock_search_pfn_regions mm/memblock.c
--- a/mm/memblock.c~mm-memblock-introduce-memblock_search_pfn_regions
+++ a/mm/memblock.c
@@ -1676,6 +1676,15 @@ static int __init_memblock memblock_sear
return -1;
}
+/* search memblock with the input pfn, return the region idx */
+int __init_memblock memblock_search_pfn_regions(unsigned long pfn)
+{
+ struct memblock_type *type = &memblock.memory;
+ int mid = memblock_search(type, PFN_PHYS(pfn));
+
+ return mid;
+}
+
bool __init memblock_is_reserved(phys_addr_t addr)
{
return memblock_search(&memblock.reserved, addr) != -1;
_
Patches currently in -mm which might be from jia.he@xxxxxxxxxxxxxxxx are
arm-arm64-introduce-config_have_memblock_pfn_valid.patch
mm-page_alloc-remain-memblock_next_valid_pfn-on-arm-arm64.patch
mm-page_alloc-reduce-unnecessary-binary-search-in-memblock_next_valid_pfn.patch
mm-memblock-introduce-memblock_search_pfn_regions.patch
mm-memblock-introduce-pfn_valid_region.patch
mm-page_alloc-reduce-unnecessary-binary-search-in-early_pfn_valid.patch
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