From mboxrd@z Thu Jan 1 00:00:00 1970 From: Baoquan He Subject: Re: [PATCH 02/21] mm: make early_pfn_to_nid() and related defintions close to each other Date: Tue, 21 Apr 2020 11:31:14 +0800 Message-ID: <20200421033114.GA29658@MiWiFi-R3L-srv> References: <20200412194859.12663-1-rppt@kernel.org> <20200412194859.12663-3-rppt@kernel.org> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:References: Message-ID:Subject:To:From:Date:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=D8wpf9xuHw0LU1HnQ3Rk0isXx9BbAhNmtRjB+IJio4I=; b=dmKiX/6zan7zeQ 2CEV5ySq4uEeDqG2tyQznBevhwAa4Wrdl936VPyrcLDhYbrlaqhoORxGi7KW9a/M5DviMS4Ls5M0Z iXLgUA9dIsjisIZtCqa7F/8GwlHnBtSCrjPFx4isRgrJQ312ynv4TbqkbHGJSLdnFDMm4rr71fqMw buEy3gh5ln08bgoHgn3oWF9LsWkW30RscRxaIEbao5KbOlYdVworT9qqCVP4m2A2XPXptx9Zxpo9T 26OhuoBbq/98YrYMLIfir9bkVt/E5Ii/3WjYbya3/90G+2AI8T1Tn8wYc0x4vIbhFvxRG3a8HGWOA tKg2htRrL6Atabb/uKRw==; DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1587439891; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=I6ayHxPbaOI5Fcwe26HcjPMTYNR5WARmXXyKaOmZqFE=; b=iimVI4IjSwRBDA966YawB4ZXEtKFLVks8GKQxAWOfSFyBzzWyl0HAxqNSlx7jhqdqeSeqb hpunnkJi0sKhyWnZqZCQExAqZEP2cVBbJyYqFgbvJDXNDfpaWSzTglkk2aOpAQP1j7+R+Q KLjphq9pQTQEnlznYiLGaNx+ZMY/Vv8= Content-Disposition: inline In-Reply-To: <20200412194859.12663-3-rppt@kernel.org> List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-snps-arc" Errors-To: linux-snps-arc-bounces+gla-linux-snps-arc=m.gmane-mx.org@lists.infradead.org To: Mike Rapoport Cc: Rich Felker , linux-ia64@vger.kernel.org, linux-doc@vger.kernel.org, Catalin Marinas , Heiko Carstens , Michal Hocko , "James E.J. Bottomley" , Max Filippov , Guo Ren , linux-csky@vger.kernel.org, linux-parisc@vger.kernel.org, sparclinux@vger.kernel.org, linux-hexagon@vger.kernel.org, linux-riscv@lists.infradead.org, Greg Ungerer , linux-arch@vger.kernel.org, linux-s390@vger.kernel.org, linux-snps-arc@lists.infradead.org, linux-c6x-dev@linux-c6x.org, Brian Cain , Jonathan Corbet , linux-sh@vger.kernel.org, Michael Ellerman , Helge Deller , x86@kernel.org, Russell King , Ley Foon Tan On 04/12/20 at 10:48pm, Mike Rapoport wrote: > From: Mike Rapoport > > The early_pfn_to_nid() and it's helper __early_pfn_to_nid() are spread > around include/linux/mm.h, include/linux/mmzone.h and mm/page_alloc.c. > > Drop unused stub for __early_pfn_to_nid() and move its actual generic > implementation close to its users. > > Signed-off-by: Mike Rapoport > --- > include/linux/mm.h | 4 ++-- > include/linux/mmzone.h | 9 -------- > mm/page_alloc.c | 51 +++++++++++++++++++++--------------------- > 3 files changed, 27 insertions(+), 37 deletions(-) > > diff --git a/include/linux/mm.h b/include/linux/mm.h > index 5a323422d783..a404026d14d4 100644 > --- a/include/linux/mm.h > +++ b/include/linux/mm.h > @@ -2388,9 +2388,9 @@ extern void sparse_memory_present_with_active_regions(int nid); > > #if !defined(CONFIG_HAVE_MEMBLOCK_NODE_MAP) && \ > !defined(CONFIG_HAVE_ARCH_EARLY_PFN_TO_NID) > -static inline int __early_pfn_to_nid(unsigned long pfn, > - struct mminit_pfnnid_cache *state) > +static inline int early_pfn_to_nid(unsigned long pfn) > { > + BUILD_BUG_ON(IS_ENABLED(CONFIG_NUMA)); > return 0; > } > #else > diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h > index 1b9de7d220fb..7b5b6eba402f 100644 > --- a/include/linux/mmzone.h > +++ b/include/linux/mmzone.h > @@ -1078,15 +1078,6 @@ static inline struct zoneref *first_zones_zonelist(struct zonelist *zonelist, > #include > #endif > > -#if !defined(CONFIG_HAVE_ARCH_EARLY_PFN_TO_NID) && \ > - !defined(CONFIG_HAVE_MEMBLOCK_NODE_MAP) > -static inline unsigned long early_pfn_to_nid(unsigned long pfn) > -{ > - BUILD_BUG_ON(IS_ENABLED(CONFIG_NUMA)); > - return 0; > -} > -#endif > - > #ifdef CONFIG_FLATMEM > #define pfn_to_nid(pfn) (0) > #endif > diff --git a/mm/page_alloc.c b/mm/page_alloc.c > index 0d012eda1694..1ac775bfc9cf 100644 > --- a/mm/page_alloc.c > +++ b/mm/page_alloc.c > @@ -1504,6 +1504,31 @@ void __free_pages_core(struct page *page, unsigned int order) > > static struct mminit_pfnnid_cache early_pfnnid_cache __meminitdata; > > +#ifndef CONFIG_HAVE_ARCH_EARLY_PFN_TO_NID > + > +/* > + * Required by SPARSEMEM. Given a PFN, return what node the PFN is on. > + */ > +int __meminit __early_pfn_to_nid(unsigned long pfn, > + struct mminit_pfnnid_cache *state) > +{ > + unsigned long start_pfn, end_pfn; > + int nid; > + > + if (state->last_start <= pfn && pfn < state->last_end) > + return state->last_nid; > + > + nid = memblock_search_pfn_nid(pfn, &start_pfn, &end_pfn); > + if (nid != NUMA_NO_NODE) { > + state->last_start = start_pfn; > + state->last_end = end_pfn; > + state->last_nid = nid; > + } > + > + return nid; > +} > +#endif /* CONFIG_HAVE_ARCH_EARLY_PFN_TO_NID */ > + > int __meminit early_pfn_to_nid(unsigned long pfn) > { > static DEFINE_SPINLOCK(early_pfn_lock); > @@ -6298,32 +6323,6 @@ void __meminit init_currently_empty_zone(struct zone *zone, > zone->initialized = 1; > } > > -#ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP Here it's apparently removing CONFIG_HAVE_MEMBLOCK_NODE_MAP too early, it should be done in patch 3, and its #end is kept there. I just found it when I almost became dizzy in reviewing patch 3. > -#ifndef CONFIG_HAVE_ARCH_EARLY_PFN_TO_NID > - > -/* > - * Required by SPARSEMEM. Given a PFN, return what node the PFN is on. > - */ > -int __meminit __early_pfn_to_nid(unsigned long pfn, > - struct mminit_pfnnid_cache *state) > -{ > - unsigned long start_pfn, end_pfn; > - int nid; > - > - if (state->last_start <= pfn && pfn < state->last_end) > - return state->last_nid; > - > - nid = memblock_search_pfn_nid(pfn, &start_pfn, &end_pfn); > - if (nid != NUMA_NO_NODE) { > - state->last_start = start_pfn; > - state->last_end = end_pfn; > - state->last_nid = nid; > - } > - > - return nid; > -} > -#endif /* CONFIG_HAVE_ARCH_EARLY_PFN_TO_NID */ > - > /** > * free_bootmem_with_active_regions - Call memblock_free_early_nid for each active range > * @nid: The node to free memory on. If MAX_NUMNODES, all nodes are freed. > -- > 2.25.1 >