From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: ARC-Seal: i=1; a=rsa-sha256; t=1521619843; cv=none; d=google.com; s=arc-20160816; b=nlQM5c4bgY1eHXo5wzNq+Muo9st7OYDhyI3UUPalmaLIb2Pz8eFE1CGGLIRq42GpcU /7w6LTcd39+oPYM0xsaTEfRjODkI4ZHCo1TmMJ3im6B0fV/iJohq9UBYp5YN95COABP5 iWxEbJ3SPmjhbjv4/F49JG8SrcPm11ZUKovndPkVoifZPtJs04kCkRHJDwbhmOn4vPlO 1IocpB183YhdzZFUGvymm/nEVMcDHBu66GzuNfCYwp+EvpeLeWVRFVGOdjffGiHjbI9M cLIP6p2O/DwOzcSMZFmg+ST/uKDE3ulu6cwVt3kJk04Bj2P+VCHx3TM51OgddptB7eLS OfiQ== 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=zGzDxI/pQbF6JtLTpDOhPdXBCDikCpmHgp2TY5damxw=; b=Z/fENy7YxhIGUEPb0hH52qSY6h0DlRKqYC+rCI0V8zmfODxVhx7+lWZKnqmQlCpW/5 /fi3zvWNb67nRl+rLDfJnLkaObJ5GPzFzXo6aUbHaiSAs8tO7A78TSXFEsTNJfFvJ4SB 22UYb/frVi2b2Qff/10EmP17LLJU6Rq3qfJFCah1lQIqitMk76hKxYFMrI2r1LzGD6uH hyJs/S+yTpmhNkLRELrEwjRdNJHccPYCMT/dApaPUTxFO5TIAXKUURnUwFPHt39txVvw QL+Z0mYgQ2GEdWcfVJ7JwlV0m1h9gbYrbmFYOFiwZcqM8Ba+dfrLQDx83I6Kt9S0GR0l hgBw== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@gmail.com header.s=20161025 header.b=l6GoliF6; 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=l6GoliF6; 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: AG47ELvYcyU3NMLZ7OOPDv6/YaO+L44EMgfi+IT/2XJeSi4VCAuB1Ctxb+q4ZtRTcGiR4rFG7/QNRA== 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 2/4] mm/memblock: introduce memblock_search_pfn_regions() Date: Wed, 21 Mar 2018 01:09:54 -0700 Message-Id: <1521619796-3846-3-git-send-email-hejianet@gmail.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1521619796-3846-1-git-send-email-hejianet@gmail.com> References: <1521619796-3846-1-git-send-email-hejianet@gmail.com> X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: =?utf-8?q?1595534048954240176?= X-GMAIL-MSGID: =?utf-8?q?1595534048954240176?= 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 | 12 ++++++++++++ 2 files changed, 14 insertions(+) diff --git a/include/linux/memblock.h b/include/linux/memblock.h index 9471db4..5f46956 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); + unsigned long memblock_next_valid_pfn(unsigned long pfn, int *last_idx); /** * for_each_free_mem_range - iterate through free memblock areas diff --git a/mm/memblock.c b/mm/memblock.c index a9e8da4..f50fe5b 100644 --- a/mm/memblock.c +++ b/mm/memblock.c @@ -1659,6 +1659,18 @@ 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)); + + if (mid == -1) + return -1; + + return mid; +} + bool __init memblock_is_reserved(phys_addr_t addr) { return memblock_search(&memblock.reserved, addr) != -1; -- 2.7.4