From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pf0-f199.google.com (mail-pf0-f199.google.com [209.85.192.199]) by kanga.kvack.org (Postfix) with ESMTP id BC4D16B0275 for ; Fri, 29 Dec 2017 02:55:32 -0500 (EST) Received: by mail-pf0-f199.google.com with SMTP id t65so29877680pfe.22 for ; Thu, 28 Dec 2017 23:55:32 -0800 (PST) Received: from bombadil.infradead.org (bombadil.infradead.org. [65.50.211.133]) by mx.google.com with ESMTPS id z100si28143451plh.172.2017.12.28.23.55.31 for (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Thu, 28 Dec 2017 23:55:31 -0800 (PST) From: Christoph Hellwig Subject: [PATCH 17/17] memremap: merge find_dev_pagemap into get_dev_pagemap Date: Fri, 29 Dec 2017 08:54:06 +0100 Message-Id: <20171229075406.1936-18-hch@lst.de> In-Reply-To: <20171229075406.1936-1-hch@lst.de> References: <20171229075406.1936-1-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 , Michal Hocko , linux-nvdimm@lists.01.org, linuxppc-dev@lists.ozlabs.org, x86@kernel.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org There is only one caller of the trivial function find_dev_pagemap left, so just merge it into the caller. Signed-off-by: Christoph Hellwig Reviewed-by: Dan Williams --- kernel/memremap.c | 10 +--------- 1 file changed, 1 insertion(+), 9 deletions(-) diff --git a/kernel/memremap.c b/kernel/memremap.c index a9a948cd3d7f..ada31b0d76d4 100644 --- a/kernel/memremap.c +++ b/kernel/memremap.c @@ -306,14 +306,6 @@ static void devm_memremap_pages_release(void *data) "%s: failed to free all reserved pages\n", __func__); } -/* assumes rcu_read_lock() held at entry */ -static struct dev_pagemap *find_dev_pagemap(resource_size_t phys) -{ - WARN_ON_ONCE(!rcu_read_lock_held()); - - return radix_tree_lookup(&pgmap_radix, PHYS_PFN(phys)); -} - /** * devm_memremap_pages - remap and provide memmap backing for the given resource * @dev: hosting device for @res @@ -466,7 +458,7 @@ struct dev_pagemap *get_dev_pagemap(unsigned long pfn, /* fall back to slow path lookup */ rcu_read_lock(); - pgmap = find_dev_pagemap(phys); + pgmap = radix_tree_lookup(&pgmap_radix, PHYS_PFN(phys)); if (pgmap && !percpu_ref_tryget_live(pgmap->ref)) pgmap = NULL; rcu_read_unlock(); -- 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