From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pf0-f200.google.com (mail-pf0-f200.google.com [209.85.192.200]) by kanga.kvack.org (Postfix) with ESMTP id A95F56B0069 for ; Thu, 7 Dec 2017 10:08:50 -0500 (EST) Received: by mail-pf0-f200.google.com with SMTP id n6so5873334pfg.19 for ; Thu, 07 Dec 2017 07:08:50 -0800 (PST) Received: from bombadil.infradead.org (bombadil.infradead.org. [65.50.211.133]) by mx.google.com with ESMTPS id d92si3916375pld.106.2017.12.07.07.08.49 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Thu, 07 Dec 2017 07:08:49 -0800 (PST) From: Christoph Hellwig Subject: [PATCH 06/14] mm: better abstract out dev_pagemap start_pfn Date: Thu, 7 Dec 2017 07:08:32 -0800 Message-Id: <20171207150840.28409-7-hch@lst.de> In-Reply-To: <20171207150840.28409-1-hch@lst.de> References: <20171207150840.28409-1-hch@lst.de> Sender: owner-linux-mm@kvack.org List-ID: To: Dan Williams Cc: =?UTF-8?q?J=C3=A9r=C3=B4me=20Glisse?= , Logan Gunthorpe , linux-nvdimm@lists.01.org, linux-mm@kvack.org Signed-off-by: Christoph Hellwig --- include/linux/memremap.h | 6 ++++++ kernel/memremap.c | 9 +++++++++ mm/page_alloc.c | 4 +--- 3 files changed, 16 insertions(+), 3 deletions(-) diff --git a/include/linux/memremap.h b/include/linux/memremap.h index d221f4c0ccac..fe60b4895f56 100644 --- a/include/linux/memremap.h +++ b/include/linux/memremap.h @@ -139,6 +139,7 @@ static inline bool is_zone_device_page(const struct page *page); int dev_pagemap_add_pages(unsigned long phys_start_pfn, unsigned nr_pages); bool dev_pagemap_free_pages(struct page *page, unsigned nr_pages); unsigned long dev_pagemap_offset(struct page *page); +unsigned long dev_pagemap_start_pfn(unsigned long start_pfn); #else static inline void *devm_memremap_pages(struct device *dev, struct resource *res, struct percpu_ref *ref, @@ -174,6 +175,11 @@ static inline unsigned long dev_pagemap_offset(struct page *page) { return 0; } + +static inline unsigned long dev_pagemap_start_pfn(unsigned long start_pfn) +{ + return 0; +} #endif /* CONFIG_ZONE_DEVICE */ #if defined(CONFIG_DEVICE_PRIVATE) || defined(CONFIG_DEVICE_PUBLIC) diff --git a/kernel/memremap.c b/kernel/memremap.c index 91a5fc1146b5..01025c5f3037 100644 --- a/kernel/memremap.c +++ b/kernel/memremap.c @@ -493,6 +493,15 @@ int dev_pagemap_add_pages(unsigned long phys_start_pfn, unsigned nr_pages) return 0; } +unsigned long dev_pagemap_start_pfn(unsigned long start_pfn) +{ + struct vmem_altmap *pgmap = to_vmem_altmap(__pfn_to_phys(start_pfn)); + + if (pgmap && start_pfn == pgmap->base_pfn) + return pgmap->reserve; + return 0; +} + bool dev_pagemap_free_pages(struct page *page, unsigned nr_pages) { struct vmem_altmap *pgmap = to_vmem_altmap((uintptr_t)page); diff --git a/mm/page_alloc.c b/mm/page_alloc.c index 73f5d4556b3d..cf6a702222c3 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -5305,7 +5305,6 @@ void __ref build_all_zonelists(pg_data_t *pgdat) void __meminit memmap_init_zone(unsigned long size, int nid, unsigned long zone, unsigned long start_pfn, enum memmap_context context) { - struct vmem_altmap *altmap = to_vmem_altmap(__pfn_to_phys(start_pfn)); unsigned long end_pfn = start_pfn + size; pg_data_t *pgdat = NODE_DATA(nid); unsigned long pfn; @@ -5321,8 +5320,7 @@ void __meminit memmap_init_zone(unsigned long size, int nid, unsigned long zone, * Honor reservation requested by the driver for this ZONE_DEVICE * memory */ - if (altmap && start_pfn == altmap->base_pfn) - start_pfn += altmap->reserve; + start_pfn += dev_pagemap_start_pfn(start_pfn); for (pfn = start_pfn; pfn < end_pfn; pfn++) { /* -- 2.14.2 -- 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