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 kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id E0F01C369CB for ; Wed, 23 Apr 2025 08:19:02 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id DF7046B00AA; Wed, 23 Apr 2025 04:18:50 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 871C66B00B1; Wed, 23 Apr 2025 04:18:50 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 5FC316B00AC; Wed, 23 Apr 2025 04:18:50 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0015.hostedemail.com [216.40.44.15]) by kanga.kvack.org (Postfix) with ESMTP id 148456B00AA for ; Wed, 23 Apr 2025 04:18:50 -0400 (EDT) Received: from smtpin20.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay06.hostedemail.com (Postfix) with ESMTP id 06EFDC65E6 for ; Wed, 23 Apr 2025 08:18:51 +0000 (UTC) X-FDA: 83364607662.20.159A456 Received: from desiato.infradead.org (desiato.infradead.org [90.155.92.199]) by imf02.hostedemail.com (Postfix) with ESMTP id 122DA80006 for ; Wed, 23 Apr 2025 08:18:48 +0000 (UTC) Authentication-Results: imf02.hostedemail.com; dkim=pass header.d=infradead.org header.s=desiato.20200630 header.b=bzRNUMuC; dmarc=none; spf=none (imf02.hostedemail.com: domain of BATV+ca0b9ff444d258c14c24+7913+infradead.org+dwmw2@desiato.srs.infradead.org has no SPF policy when checking 90.155.92.199) smtp.mailfrom=BATV+ca0b9ff444d258c14c24+7913+infradead.org+dwmw2@desiato.srs.infradead.org ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1745396329; a=rsa-sha256; cv=none; b=gI/JX/2rejpu6jtdeR4y4ps8rl0UqICml/e5w+0YjdzTuqVFa6WzyDwxIs73pVtiSbsduP vUTxL1/6p2p4BzmGkVMCoBqPto3PcpxsOOA2ipfi5v1sHAiY/ffh9QBV9wvfQgOeVo/EHg el10qIFyj1aYhO8oCndgjguljmk0ya4= ARC-Authentication-Results: i=1; imf02.hostedemail.com; dkim=pass header.d=infradead.org header.s=desiato.20200630 header.b=bzRNUMuC; dmarc=none; spf=none (imf02.hostedemail.com: domain of BATV+ca0b9ff444d258c14c24+7913+infradead.org+dwmw2@desiato.srs.infradead.org has no SPF policy when checking 90.155.92.199) smtp.mailfrom=BATV+ca0b9ff444d258c14c24+7913+infradead.org+dwmw2@desiato.srs.infradead.org ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1745396329; h=from:from:sender:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references:dkim-signature; bh=X8ymBgUSA5ZN0KXL1mRdo7aKval8NgY94GI7dvST/r4=; b=bDnTwB/BTFZ85J54breFvUIhQGossGLMsJL/3J4wlcRV8V4l2jES9PvMRepollaSv9EzRT RJmPg7M00l33kNhKe5iwEgw8s9gRsgmu30++ez2XEU57nTBmfs0CN+FiCiJvaE6Go1A1yf AyuLxO+E1Gn/ViGAEB6QxbLVAuoyEzI= DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=desiato.20200630; 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=bzRNUMuChOzbFAH8S7qC9tNmhC CIlHhZ7LuV418WmWzA7dWK7LtPbTHUO5x+uwHyVe0fBqEluh74Bj2oF8f9nV3ZGMyXsLqCzSh7nM+ 5XzAGnmgdqk1NUpe1dztvjf4ruAkXFrvZ92PhGQiS9AXOcfLT91vOWRIscbdVaAKCBpmWjk6u0zYG 2Pq7RHsR2aXU4piqfHOSQqnqzU/zswY0gynnv7WGJYItq0WD1AeVoBVArXIhO/3Ph8ZKnG7yLlePa sr0gFSgo1A7Ty/QUAfGAVZmtCEvnZwo6H8NEaGOwYwXyBYZcd0HzoFEox1hJoGvF7DfhDt92xgdM4 CKV4ZNIA==; Received: from [2001:8b0:10b:1::ebe] (helo=i7.infradead.org) by desiato.infradead.org with esmtpsa (Exim 4.98.1 #2 (Red Hat Linux)) id 1u7VJR-0000000BOie-1aho; Wed, 23 Apr 2025 08:18:33 +0000 Received: from dwoodhou by i7.infradead.org with local (Exim 4.98.1 #2 (Red Hat Linux)) id 1u7VJO-00000002YNq-1401; Wed, 23 Apr 2025 09:18:30 +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 , kvmarm@lists.cs.columbia.edu, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, Ruihan Li Subject: [PATCH v3 2/7] mm: Implement for_each_valid_pfn() for CONFIG_FLATMEM Date: Wed, 23 Apr 2025 08:52:44 +0100 Message-ID: <20250423081828.608422-3-dwmw2@infradead.org> X-Mailer: git-send-email 2.49.0 In-Reply-To: <20250423081828.608422-1-dwmw2@infradead.org> References: <20250423081828.608422-1-dwmw2@infradead.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-SRS-Rewrite: SMTP reverse-path rewritten from by desiato.infradead.org. See http://www.infradead.org/rpr.html X-Rspamd-Server: rspam03 X-Rspamd-Queue-Id: 122DA80006 X-Stat-Signature: 9k5scwft7ey8gbkbh569z8opc3xdswak X-Rspam-User: X-HE-Tag: 1745396328-484190 X-HE-Meta: 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 fT2SrLMQ 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 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: 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