From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-la0-f49.google.com (mail-la0-f49.google.com [209.85.215.49]) by kanga.kvack.org (Postfix) with ESMTP id E3C566B0253 for ; Thu, 27 Aug 2015 15:20:24 -0400 (EDT) Received: by labns7 with SMTP id ns7so19150279lab.0 for ; Thu, 27 Aug 2015 12:20:24 -0700 (PDT) Received: from mail-la0-x22f.google.com (mail-la0-x22f.google.com. [2a00:1450:4010:c03::22f]) by mx.google.com with ESMTPS id l5si3288305lbs.78.2015.08.27.12.20.22 for (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Thu, 27 Aug 2015 12:20:23 -0700 (PDT) Received: by laba3 with SMTP id a3so19074872lab.1 for ; Thu, 27 Aug 2015 12:20:22 -0700 (PDT) From: Alexander Kuleshov Subject: [PATCH v1] mm/memblock: Add memblock_first_region_size() helper Date: Fri, 28 Aug 2015 01:19:45 +0600 Message-Id: <1440703185-16072-1-git-send-email-kuleshovmail@gmail.com> Sender: owner-linux-mm@kvack.org List-ID: To: Andrew Morton , Tony Luck , Pekka Enberg Cc: Mel Gorman , Xishi Qiu , Baoquan He , Robin Holt , linux-mm@kvack.org, linux-kernel@vger.kernel.org, Alexander Kuleshov 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 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org