From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753291AbbIAO1v (ORCPT ); Tue, 1 Sep 2015 10:27:51 -0400 Received: from mail-la0-f41.google.com ([209.85.215.41]:35270 "EHLO mail-la0-f41.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753013AbbIAO1u (ORCPT ); Tue, 1 Sep 2015 10:27:50 -0400 From: Alexander Kuleshov To: Andrew Morton , Tony Luck , Pekka Enberg , Mel Gorman , Xishi Qiu , Robin Holt Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org, Alexander Kuleshov Subject: [PATCH 1/5 v2] mm/memblock: Introduce memblock_first_region_size() helper Date: Tue, 1 Sep 2015 20:27:11 +0600 Message-Id: <1441117631-30589-1-git-send-email-kuleshovmail@gmail.com> X-Mailer: git-send-email 2.5.0 In-Reply-To: <1441117527-30466-1-git-send-email-kuleshovmail@gmail.com> References: <1441117527-30466-1-git-send-email-kuleshovmail@gmail.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Some architectures (like s390, microblaze and etc...) require size of the first memory region. This patch provides new memblock_first_region_size() helper for this case. Signed-off-by: Alexander Kuleshov --- include/linux/memblock.h | 1 + mm/memblock.c | 5 +++++ 2 files changed, 6 insertions(+) diff --git a/include/linux/memblock.h b/include/linux/memblock.h index cc4b019..8a481e5 100644 --- a/include/linux/memblock.h +++ b/include/linux/memblock.h @@ -319,6 +319,7 @@ phys_addr_t memblock_phys_mem_size(void); phys_addr_t memblock_mem_size(unsigned long limit_pfn); phys_addr_t memblock_start_of_DRAM(void); phys_addr_t memblock_end_of_DRAM(void); +phys_addr_t memblock_first_region_size(void); void memblock_enforce_memory_limit(phys_addr_t memory_limit); int memblock_is_memory(phys_addr_t addr); int memblock_is_region_memory(phys_addr_t base, phys_addr_t size); diff --git a/mm/memblock.c b/mm/memblock.c index 87108e7..fb4b7ca 100644 --- a/mm/memblock.c +++ b/mm/memblock.c @@ -1463,6 +1463,11 @@ phys_addr_t __init_memblock memblock_end_of_DRAM(void) return (memblock.memory.regions[idx].base + memblock.memory.regions[idx].size); } +phys_addr_t __init_memblock memblock_first_region_size(void) +{ + return memblock.memory.regions[0].size; +} + void __init memblock_enforce_memory_limit(phys_addr_t limit) { phys_addr_t max_addr = (phys_addr_t)ULLONG_MAX; -- 2.5.0