From patchwork Fri Jun 14 13:47:24 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 10995467 X-Patchwork-Delegate: johannes@sipsolutions.net Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 239D276 for ; Fri, 14 Jun 2019 13:48:53 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 1617B28390 for ; Fri, 14 Jun 2019 13:48:53 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 0AB83284DA; Fri, 14 Jun 2019 13:48:53 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.7 required=2.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI autolearn=unavailable version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 907DE28390 for ; Fri, 14 Jun 2019 13:48:52 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729158AbfFNNsv (ORCPT ); Fri, 14 Jun 2019 09:48:51 -0400 Received: from bombadil.infradead.org ([198.137.202.133]:54062 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729047AbfFNNsj (ORCPT ); Fri, 14 Jun 2019 09:48:39 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20170209; h=Content-Transfer-Encoding: MIME-Version:References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From:Sender :Reply-To:Content-Type:Content-ID:Content-Description:Resent-Date:Resent-From :Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Id:List-Help: List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=Gz4Xhr4GKX8cgnBiH4+BILh020IQOylUizPJRjDHE/E=; b=cf3JZA+ZRH3KX860kHpnPR8oA/ bqAxf2wdh/kYQFTTiXQ/cfGIHFtkzi1Q6IAe9eh8VXYnYOyFEmHCCu4FhR+BvSXtpAx5ApdhZC2tL eqsB5EioSDc9+R5gTT7rMPzafsusILIBU05BomvsIAKlHCVNuXOq2PanGax2oHqCJpo1ef3+4E/WO eAvSS6Dx80B05dalPw/wekrBppUw3IEJLxzJHpuSGlVG4QM3kKSs6MrdGwLQEd0MHw3LaJPiqt54p Ec8ghntYydM0pKm2+mAy/RaUMsAIhlCtQMD+RUDzu5uz1USZRuoH2TqfwRFQkKEzx7x86HBrZfST/ CbsAG57g==; Received: from 213-225-9-13.nat.highway.a1.net ([213.225.9.13] helo=localhost) by bombadil.infradead.org with esmtpsa (Exim 4.92 #3 (Red Hat Linux)) id 1hbmZ3-0005hB-Ky; Fri, 14 Jun 2019 13:48:22 +0000 From: Christoph Hellwig To: Maarten Lankhorst , Maxime Ripard , Sean Paul , David Airlie , Daniel Vetter , Jani Nikula , Joonas Lahtinen , Rodrigo Vivi , Ian Abbott , H Hartley Sweeten Cc: Intel Linux Wireless , linux-arm-kernel@lists.infradead.org (moderated list:ARM PORT), dri-devel@lists.freedesktop.org, intel-gfx@lists.freedesktop.org, linux-rdma@vger.kernel.org, linux-media@vger.kernel.org, netdev@vger.kernel.org, linux-wireless@vger.kernel.org, linux-s390@vger.kernel.org, devel@driverdev.osuosl.org, linux-mm@kvack.org, iommu@lists.linux-foundation.org, linux-kernel@vger.kernel.org Subject: [PATCH 14/16] mm: use alloc_pages_exact_node to implement alloc_pages_exact Date: Fri, 14 Jun 2019 15:47:24 +0200 Message-Id: <20190614134726.3827-15-hch@lst.de> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190614134726.3827-1-hch@lst.de> References: <20190614134726.3827-1-hch@lst.de> MIME-Version: 1.0 X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html Sender: linux-wireless-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-wireless@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP No need to duplicate the logic over two functions that are almost the same. Signed-off-by: Christoph Hellwig --- include/linux/gfp.h | 5 +++-- mm/page_alloc.c | 39 +++++++-------------------------------- 2 files changed, 10 insertions(+), 34 deletions(-) diff --git a/include/linux/gfp.h b/include/linux/gfp.h index 4274ea6bc72b..c616a23a3f81 100644 --- a/include/linux/gfp.h +++ b/include/linux/gfp.h @@ -530,9 +530,10 @@ extern struct page *alloc_pages_vma(gfp_t gfp_mask, int order, extern unsigned long __get_free_pages(gfp_t gfp_mask, unsigned int order); extern unsigned long get_zeroed_page(gfp_t gfp_mask); -void *alloc_pages_exact(size_t size, gfp_t gfp_mask); void free_pages_exact(void *virt, size_t size); -void * __meminit alloc_pages_exact_node(int nid, size_t size, gfp_t gfp_mask); +void *alloc_pages_exact_node(int nid, size_t size, gfp_t gfp_mask); +#define alloc_pages_exact(size, gfp_mask) \ + alloc_pages_exact_node(NUMA_NO_NODE, size, gfp_mask) #define __get_free_page(gfp_mask) \ __get_free_pages((gfp_mask), 0) diff --git a/mm/page_alloc.c b/mm/page_alloc.c index dd2fed66b656..dec68bd21a71 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -4859,34 +4859,6 @@ static void *make_alloc_exact(unsigned long addr, unsigned int order, return (void *)addr; } -/** - * alloc_pages_exact - allocate an exact number physically-contiguous pages. - * @size: the number of bytes to allocate - * @gfp_mask: GFP flags for the allocation, must not contain __GFP_COMP - * - * This function is similar to alloc_pages(), except that it allocates the - * minimum number of pages to satisfy the request. alloc_pages() can only - * allocate memory in power-of-two pages. - * - * This function is also limited by MAX_ORDER. - * - * Memory allocated by this function must be released by free_pages_exact(). - * - * Return: pointer to the allocated area or %NULL in case of error. - */ -void *alloc_pages_exact(size_t size, gfp_t gfp_mask) -{ - unsigned int order = get_order(size); - unsigned long addr; - - if (WARN_ON_ONCE(gfp_mask & __GFP_COMP)) - gfp_mask &= ~__GFP_COMP; - - addr = __get_free_pages(gfp_mask, order); - return make_alloc_exact(addr, order, size); -} -EXPORT_SYMBOL(alloc_pages_exact); - /** * alloc_pages_exact_node - allocate an exact number of physically-contiguous * pages on a node. @@ -4894,12 +4866,15 @@ EXPORT_SYMBOL(alloc_pages_exact); * @size: the number of bytes to allocate * @gfp_mask: GFP flags for the allocation, must not contain __GFP_COMP * - * Like alloc_pages_exact(), but try to allocate on node nid first before falling - * back. + * This function is similar to alloc_pages_node(), except that it allocates the + * minimum number of pages to satisfy the request while alloc_pages() can only + * allocate memory in power-of-two pages. This function is also limited by + * MAX_ORDER. * - * Return: pointer to the allocated area or %NULL in case of error. + * Returns a pointer to the allocated area or %NULL in case of error, memory + * allocated by this function must be released by free_pages_exact(). */ -void * __meminit alloc_pages_exact_node(int nid, size_t size, gfp_t gfp_mask) +void *alloc_pages_exact_node(int nid, size_t size, gfp_t gfp_mask) { unsigned int order = get_order(size); struct page *p;