From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754185AbeDBCcv (ORCPT ); Sun, 1 Apr 2018 22:32:51 -0400 Received: from mail-pf0-f196.google.com ([209.85.192.196]:40386 "EHLO mail-pf0-f196.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754132AbeDBCct (ORCPT ); Sun, 1 Apr 2018 22:32:49 -0400 X-Google-Smtp-Source: AIpwx4+zbFaTkKWbMau9UfOXPyoEtmpKoX7c0sYtyygxzunMlH1VjRGILpz3jK6PW7vJk7lSK5WQOQ== From: Jia He To: Russell King , Catalin Marinas , Will Deacon , Mark Rutland , Ard Biesheuvel , Andrew Morton , Michal Hocko Cc: Wei Yang , Kees Cook , Laura Abbott , Vladimir Murzin , Philip Derrin , Grygorii Strashko , AKASHI Takahiro , James Morse , Steve Capper , Pavel Tatashin , Gioh Kim , Vlastimil Babka , Mel Gorman , Johannes Weiner , Kemi Wang , Petr Tesarik , YASUAKI ISHIMATSU , Andrey Ryabinin , Nikolay Borisov , Daniel Jordan , Daniel Vacek , Eugeniu Rosca , linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, Jia He , Jia He Subject: [PATCH v5 3/5] mm/memblock: introduce memblock_search_pfn_regions() Date: Sun, 1 Apr 2018 19:30:34 -0700 Message-Id: <1522636236-12625-4-git-send-email-hejianet@gmail.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1522636236-12625-1-git-send-email-hejianet@gmail.com> References: <1522636236-12625-1-git-send-email-hejianet@gmail.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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 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