From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pf0-f198.google.com (mail-pf0-f198.google.com [209.85.192.198]) by kanga.kvack.org (Postfix) with ESMTP id 7A5056B000D for ; Sat, 24 Mar 2018 08:25:45 -0400 (EDT) Received: by mail-pf0-f198.google.com with SMTP id c65so552120pfa.5 for ; Sat, 24 Mar 2018 05:25:45 -0700 (PDT) Received: from mail-sor-f65.google.com (mail-sor-f65.google.com. [209.85.220.65]) by mx.google.com with SMTPS id k11sor3009938pfh.52.2018.03.24.05.25.44 for (Google Transport Security); Sat, 24 Mar 2018 05:25:44 -0700 (PDT) From: Jia He Subject: [PATCH v2 3/5] mm/memblock: introduce memblock_search_pfn_regions() Date: Sat, 24 Mar 2018 05:24:40 -0700 Message-Id: <1521894282-6454-4-git-send-email-hejianet@gmail.com> In-Reply-To: <1521894282-6454-1-git-send-email-hejianet@gmail.com> References: <1521894282-6454-1-git-send-email-hejianet@gmail.com> Sender: owner-linux-mm@kvack.org List-ID: To: Andrew Morton , Michal Hocko , Catalin Marinas , Mel Gorman , Will Deacon , Mark Rutland , Thomas Gleixner , Ingo Molnar , "H. Peter Anvin" Cc: Pavel Tatashin , Daniel Jordan , AKASHI Takahiro , Gioh Kim , Steven Sistare , Daniel Vacek , Eugeniu Rosca , Vlastimil Babka , linux-kernel@vger.kernel.org, linux-mm@kvack.org, James Morse , Ard Biesheuvel , Steve Capper , x86@kernel.org, Greg Kroah-Hartman , Kate Stewart , Philippe Ombredanne , Johannes Weiner , Kemi Wang , Petr Tesarik , YASUAKI ISHIMATSU , Andrey Ryabinin , Nikolay Borisov , Jia He , Jia He This api is the preparation for further optimizing early_pfn_valid Signed-off-by: Jia He --- 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 a8fb2ab..104bca6 100644 --- a/include/linux/memblock.h +++ b/include/linux/memblock.h @@ -207,6 +207,8 @@ void __next_mem_pfn_range(int *idx, int nid, unsigned long *out_start_pfn, unsigned long memblock_next_valid_pfn(unsigned long pfn, int *idx); #endif +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 06c1a08..15fcde2 100644 --- a/mm/memblock.c +++ b/mm/memblock.c @@ -1661,6 +1661,15 @@ 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