From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 9B6BFC369CB for ; Wed, 23 Apr 2025 14:16:35 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: MIME-Version:References:In-Reply-To:Message-ID:Date:Subject:Cc:To:From: Reply-To:Content-Type:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=X8ymBgUSA5ZN0KXL1mRdo7aKval8NgY94GI7dvST/r4=; b=nV+12VmdrNXH6l2Iv/GbUVnQN8 zJfymwLC0GgfE3cBJf3I+rgv9byoghEAPuDWUo28lIJcl0d5NCHEKy3WosspFTRERcwE++ZJ+pCis dK/qKwwMRVplxeCkEICawgG4f/tl+7AEOV9d+u6IwLedvoaxTYneUjZgz9ULewpp+0jgpDPuOTa/p Br/xErAYo5cEQc6Iv5TPm3cCt9o/KIWaXO61sizNQtiIOxUUcSBfeMtBkone1iKzt99LML8oDDyA3 g46XBLS9P/FRhvBkBgExylfUviDtv70gqWevy82sGXU4dVUhHXiljXO9ACLGlCLK2ICsZj4139Hz/ WWG3dUpA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1u7atn-0000000AnFh-2uMu; Wed, 23 Apr 2025 14:16:27 +0000 Received: from casper.infradead.org ([2001:8b0:10b:1236::1]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1u7aJ2-0000000AdMj-1BuM for linux-arm-kernel@bombadil.infradead.org; Wed, 23 Apr 2025 13:38:28 +0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=Sender:Content-Transfer-Encoding: MIME-Version:References:In-Reply-To:Message-ID:Date:Subject:Cc:To:From: Reply-To:Content-Type:Content-ID:Content-Description; bh=X8ymBgUSA5ZN0KXL1mRdo7aKval8NgY94GI7dvST/r4=; b=uW58jtRqb9rat/jy8XkoWXi6AM P5hBl1WxKrp7wIkxwfz+6u7NU8jvldTnxq3MoRWuRVIVRPipDpYnUz1mDzIfq3i1QBvampsw2aEwQ I4OxrPjEOuWNCXGVF0jZCkg2UAGOmQSnAvL2XphfzHq2X4K8aOlqPUyyl1hfVjtBX7cVs/aumXtvy jqqPrhjkixIsOz0u2SoFC5F2wMqoSA2j4wbk+EGow/2lwBctZL1ltQRDAhN7sGTYmsUGzkX0a9kmM OIx/37DsAK4P8S1w4p/VCW8r9vTVozBgxF8Z+i4gIBXgypuwJ7hU+0nl5ALm2zd7AOit6GcvxTcPR YbBLCf+A==; Received: from [2001:8b0:10b:1::ebe] (helo=i7.infradead.org) by casper.infradead.org with esmtpsa (Exim 4.98.2 #2 (Red Hat Linux)) id 1u7aIx-000000097Jf-1dtS; Wed, 23 Apr 2025 13:38:23 +0000 Received: from dwoodhou by i7.infradead.org with local (Exim 4.98.1 #2 (Red Hat Linux)) id 1u7aIx-00000003JOg-0b7h; Wed, 23 Apr 2025 14:38:23 +0100 From: David Woodhouse To: Mike Rapoport Cc: Andrew Morton , "Sauerwein, David" , Anshuman Khandual , Ard Biesheuvel , Catalin Marinas , David Hildenbrand , Marc Zyngier , Mark Rutland , Mike Rapoport , Will Deacon , linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, Ruihan Li Subject: [PATCH v4 2/7] mm: Implement for_each_valid_pfn() for CONFIG_FLATMEM Date: Wed, 23 Apr 2025 14:33:38 +0100 Message-ID: <20250423133821.789413-3-dwmw2@infradead.org> X-Mailer: git-send-email 2.49.0 In-Reply-To: <20250423133821.789413-1-dwmw2@infradead.org> References: <20250423133821.789413-1-dwmw2@infradead.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-SRS-Rewrite: SMTP reverse-path rewritten from by casper.infradead.org. See http://www.infradead.org/rpr.html X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org From: David Woodhouse In the FLATMEM case, the default pfn_valid() just checks that the PFN is within the range [ ARCH_PFN_OFFSET .. ARCH_PFN_OFFSET + max_mapnr ). The for_each_valid_pfn() function can therefore be a simple for() loop using those as min/max respectively. Signed-off-by: David Woodhouse Reviewed-by: Mike Rapoport (Microsoft) --- include/asm-generic/memory_model.h | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-) diff --git a/include/asm-generic/memory_model.h b/include/asm-generic/memory_model.h index a3b5029aebbd..74d0077cc5fa 100644 --- a/include/asm-generic/memory_model.h +++ b/include/asm-generic/memory_model.h @@ -30,7 +30,15 @@ static inline int pfn_valid(unsigned long pfn) return pfn >= pfn_offset && (pfn - pfn_offset) < max_mapnr; } #define pfn_valid pfn_valid -#endif + +#ifndef for_each_valid_pfn +#define for_each_valid_pfn(pfn, start_pfn, end_pfn) \ + for ((pfn) = max_t(unsigned long, (start_pfn), ARCH_PFN_OFFSET); \ + (pfn) < min_t(unsigned long, (end_pfn), \ + ARCH_PFN_OFFSET + max_mapnr); \ + (pfn)++) +#endif /* for_each_valid_pfn */ +#endif /* valid_pfn */ #elif defined(CONFIG_SPARSEMEM_VMEMMAP) -- 2.49.0