From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: ARC-Seal: i=1; a=rsa-sha256; t=1521894344; cv=none; d=google.com; s=arc-20160816; b=AJJiQcTVmE2aBA2Q0aRpCz2+oA0tSL4/r25wN6Q2na+gm3gDiQ9QS/Rr5ASDm3s7iK nXyvEHwS8e8OS73XiwUs9yaX+4o7H86MOI+xaXPEbxZ2ssX5+ZHyDlm852QFiMh3YfnV debvA44BvJ4lJCc2LjF9UKYYQg5h/DT7SqtNQst4LoahLkvFA95/5RWi6rjgQ1M8iRSx fPNpOKDtJR3oeBdfJvSwZ58QzOEvi3s9bwBawtZkoDMIpneoLg5Xz4JIY/GomAwOCzgx PSukgyozKvS4X3lzHsdnU6copAuFTR43Dt6N161QruBWfUh4aHOhOP9JNwMq+WSjULWD qDUw== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=references:in-reply-to:message-id:date:subject:cc:to:from :dkim-signature:arc-authentication-results; bh=A3iyvOJjQFbESrn9840Z+H7nJuG4UfdlxalRzNH63tE=; b=JaY45rGiy7SRVY2HtdiQhIVnGN7TSQaX8CIIPcQN5SegxGwlnQl0/2ggmeswxgy3mF rb2kYkTFHk4KU1qArnP0xnhtlXKfs8XlRC+SoWt9LXAolAhHyKMLzfMyHPG2GisSG6s+ 00Vbhm8Qigsst8HH66kLsknjxX0QFyCq4Z5VluusnfKX8jsUcMk5BHhqTbvIqxQSULlV IgIxmpoaxtAI+wNxNnIShudGW5rcdsuO2UFCoCtWUnJ509ktrbmN0uRYoVSzIKcIKhaG NcMMf+SM+tni403ubYTg2HbzDUZ7XEjSeYpDspal1hrMfrgjLPRDZ4hq2u0+vc43wFr4 hNSQ== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@gmail.com header.s=20161025 header.b=nmTUE6Gj; spf=pass (google.com: domain of hejianet@gmail.com designates 209.85.220.65 as permitted sender) smtp.mailfrom=hejianet@gmail.com; dmarc=pass (p=NONE sp=QUARANTINE dis=NONE) header.from=gmail.com Authentication-Results: mx.google.com; dkim=pass header.i=@gmail.com header.s=20161025 header.b=nmTUE6Gj; spf=pass (google.com: domain of hejianet@gmail.com designates 209.85.220.65 as permitted sender) smtp.mailfrom=hejianet@gmail.com; dmarc=pass (p=NONE sp=QUARANTINE dis=NONE) header.from=gmail.com X-Google-Smtp-Source: AG47ELu9334Z7H7NywcCQXspD7PbURvLfWRToRSl2Mr7qMBqrk9GG+o0ndAvWdIvKTq5vmJuLqk/VA== From: Jia He 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 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> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1521894282-6454-1-git-send-email-hejianet@gmail.com> References: <1521894282-6454-1-git-send-email-hejianet@gmail.com> X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: =?utf-8?q?1595821884375093048?= X-GMAIL-MSGID: =?utf-8?q?1595821884375093048?= X-Mailing-List: linux-kernel@vger.kernel.org List-ID: 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