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Date: Sun, 1 Apr 2018 19:30:34 -0700 From: Jia He <hejianet@...il.com> To: Russell King <linux@...linux.org.uk>, Catalin Marinas <catalin.marinas@....com>, Will Deacon <will.deacon@....com>, Mark Rutland <mark.rutland@....com>, Ard Biesheuvel <ard.biesheuvel@...aro.org>, Andrew Morton <akpm@...ux-foundation.org>, Michal Hocko <mhocko@...e.com> Cc: Wei Yang <richard.weiyang@...il.com>, Kees Cook <keescook@...omium.org>, Laura Abbott <labbott@...hat.com>, Vladimir Murzin <vladimir.murzin@....com>, Philip Derrin <philip@....systems>, Grygorii Strashko <grygorii.strashko@...aro.org>, AKASHI Takahiro <takahiro.akashi@...aro.org>, James Morse <james.morse@....com>, Steve Capper <steve.capper@....com>, Pavel Tatashin <pasha.tatashin@...cle.com>, Gioh Kim <gi-oh.kim@...fitbricks.com>, Vlastimil Babka <vbabka@...e.cz>, Mel Gorman <mgorman@...e.de>, Johannes Weiner <hannes@...xchg.org>, Kemi Wang <kemi.wang@...el.com>, Petr Tesarik <ptesarik@...e.com>, YASUAKI ISHIMATSU <yasu.isimatu@...il.com>, Andrey Ryabinin <aryabinin@...tuozzo.com>, Nikolay Borisov <nborisov@...e.com>, Daniel Jordan <daniel.m.jordan@...cle.com>, Daniel Vacek <neelx@...hat.com>, Eugeniu Rosca <erosca@...adit-jv.com>, linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org, linux-mm@...ck.org, Jia He <hejianet@...il.com>, Jia He <jia.he@...-semitech.com> Subject: [PATCH v5 3/5] mm/memblock: introduce memblock_search_pfn_regions() This api is the preparation for further optimizing early_pfn_valid Signed-off-by: Jia He <jia.he@...-semitech.com> --- include/linux/memblock.h | 2 ++ mm/memblock.c | 9 +++++++++ 2 files changed, 11 insertions(+) diff --git a/include/linux/memblock.h b/include/linux/memblock.h index 0257aee..a0127b3 100644 --- a/include/linux/memblock.h +++ b/include/linux/memblock.h @@ -203,6 +203,8 @@ void __next_mem_pfn_range(int *idx, int nid, unsigned long *out_start_pfn, 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 --git a/mm/memblock.c b/mm/memblock.c index ba7c878..0f4004c 100644 --- a/mm/memblock.c +++ b/mm/memblock.c @@ -1617,6 +1617,15 @@ static int __init_memblock memblock_search(struct memblock_type *type, phys_addr 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; -- 2.7.4
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