From mboxrd@z Thu Jan 1 00:00:00 1970 From: Andrew Morton Subject: [patch 024/131] xtensa: simplify detection of memory zone boundaries Date: Wed, 03 Jun 2020 15:57:50 -0700 Message-ID: <20200603225750.R-_JSfpH2%akpm@linux-foundation.org> References: <20200603155549.e041363450869eaae4c7f05b@linux-foundation.org> Reply-To: linux-kernel@vger.kernel.org Return-path: Received: from mail.kernel.org ([198.145.29.99]:39646 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725821AbgFCW5y (ORCPT ); Wed, 3 Jun 2020 18:57:54 -0400 In-Reply-To: <20200603155549.e041363450869eaae4c7f05b@linux-foundation.org> Sender: mm-commits-owner@vger.kernel.org List-Id: mm-commits@vger.kernel.org To: akpm@linux-foundation.org, bcain@codeaurora.org, bhe@redhat.com, catalin.marinas@arm.com, corbet@lwn.net, dalias@libc.org, davem@davemloft.net, deller@gmx.de, geert@linux-m68k.org, gerg@linux-m68k.org, green.hu@gmail.com, guoren@kernel.org, gxt@pku.edu.cn, heiko.carstens@de.ibm.com, hoan@os.amperecomputing.com, James.Bottomley@HansenPartnership.com, jcmvbkbc@gmail.com, ley.foon.tan@intel.com, linux-mm@kvack.org, linux@armlinux.org.uk, mattst88@gmail.com, mhocko@kernel.org, mm-commits@vger.kernel.org, monstr@monstr.eu, mpe@ellerman.id.au, msalter@redhat.com, nickhu@andestech.com, paul.walmsley@sifive.com, richard@nod.at, rppt@linux.ibm.com, shorne@gmail.com, tony.luck@intel.com, torvalds@linux-foundation.org, tsbogend@alpha.franken.de, vgupta@synopsys.com, ysato@users.sourceforge.jp From: Mike Rapoport Subject: xtensa: simplify detection of memory zone boundaries free_area_init() only requires the definition of maximal PFN for each of the supported zone rater than calculation of actual zone sizes and the sizes of the holes between the zones. After removal of CONFIG_HAVE_MEMBLOCK_NODE_MAP the free_area_init() is available to all architectures. Using this function instead of free_area_init_node() simplifies the zone detection. Link: http://lkml.kernel.org/r/20200412194859.12663-15-rppt@kernel.org Signed-off-by: Mike Rapoport Tested-by: Hoan Tran [arm64] Cc: Baoquan He Cc: Brian Cain Cc: Catalin Marinas Cc: "David S. Miller" Cc: Geert Uytterhoeven Cc: Greentime Hu Cc: Greg Ungerer Cc: Guan Xuetao Cc: Guo Ren Cc: Heiko Carstens Cc: Helge Deller Cc: "James E.J. Bottomley" Cc: Jonathan Corbet Cc: Ley Foon Tan Cc: Mark Salter Cc: Matt Turner Cc: Max Filippov Cc: Michael Ellerman Cc: Michal Hocko Cc: Michal Simek Cc: Nick Hu Cc: Paul Walmsley Cc: Richard Weinberger Cc: Rich Felker Cc: Russell King Cc: Stafford Horne Cc: Thomas Bogendoerfer Cc: Tony Luck Cc: Vineet Gupta Cc: Yoshinori Sato Signed-off-by: Andrew Morton --- arch/xtensa/mm/init.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) --- a/arch/xtensa/mm/init.c~xtensa-simplify-detection-of-memory-zone-boundaries +++ a/arch/xtensa/mm/init.c @@ -70,13 +70,13 @@ void __init bootmem_init(void) void __init zones_init(void) { /* All pages are DMA-able, so we put them all in the DMA zone. */ - unsigned long zones_size[MAX_NR_ZONES] = { - [ZONE_NORMAL] = max_low_pfn - ARCH_PFN_OFFSET, + unsigned long max_zone_pfn[MAX_NR_ZONES] = { + [ZONE_NORMAL] = max_low_pfn, #ifdef CONFIG_HIGHMEM - [ZONE_HIGHMEM] = max_pfn - max_low_pfn, + [ZONE_HIGHMEM] = max_pfn, #endif }; - free_area_init_node(0, zones_size, ARCH_PFN_OFFSET, NULL); + free_area_init(max_zone_pfn); } #ifdef CONFIG_HIGHMEM _