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[23.128.96.18]) by mx.google.com with ESMTP id u3si13535237pgi.146.2021.10.12.03.42.37; Tue, 12 Oct 2021 03:42:49 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235900AbhJLKnA (ORCPT + 99 others); Tue, 12 Oct 2021 06:43:00 -0400 Received: from pegase2.c-s.fr ([93.17.235.10]:34007 "EHLO pegase2.c-s.fr" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235984AbhJLKnA (ORCPT ); Tue, 12 Oct 2021 06:43:00 -0400 Received: from localhost (mailhub3.si.c-s.fr [172.26.127.67]) by localhost (Postfix) with ESMTP id 4HTByx4BnRz9sVK; Tue, 12 Oct 2021 12:40:57 +0200 (CEST) X-Virus-Scanned: amavisd-new at c-s.fr Received: from pegase2.c-s.fr ([172.26.127.65]) by localhost (pegase2.c-s.fr [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id VQB6d9Ka3zca; Tue, 12 Oct 2021 12:40:57 +0200 (CEST) Received: from messagerie.si.c-s.fr (messagerie.si.c-s.fr [192.168.25.192]) by pegase2.c-s.fr (Postfix) with ESMTP id 4HTByx3Dk3z9sVF; Tue, 12 Oct 2021 12:40:57 +0200 (CEST) Received: from localhost (localhost [127.0.0.1]) by messagerie.si.c-s.fr (Postfix) with ESMTP id 559578B770; Tue, 12 Oct 2021 12:40:57 +0200 (CEST) X-Virus-Scanned: amavisd-new at c-s.fr Received: from messagerie.si.c-s.fr ([127.0.0.1]) by localhost (messagerie.si.c-s.fr [127.0.0.1]) (amavisd-new, port 10023) with ESMTP id znLH9-9lxJwi; Tue, 12 Oct 2021 12:40:57 +0200 (CEST) Received: from PO20335.IDSI0.si.c-s.fr (unknown [192.168.202.154]) by messagerie.si.c-s.fr (Postfix) with ESMTP id 1E7718B763; Tue, 12 Oct 2021 12:40:57 +0200 (CEST) Received: from PO20335.IDSI0.si.c-s.fr (localhost [127.0.0.1]) by PO20335.IDSI0.si.c-s.fr (8.16.1/8.16.1) with ESMTPS id 19CAekBX1755822 (version=TLSv1.3 cipher=TLS_AES_256_GCM_SHA384 bits=256 verify=NOT); Tue, 12 Oct 2021 12:40:46 +0200 Received: (from chleroy@localhost) by PO20335.IDSI0.si.c-s.fr (8.16.1/8.16.1/Submit) id 19CAegQt1755821; Tue, 12 Oct 2021 12:40:42 +0200 X-Authentication-Warning: PO20335.IDSI0.si.c-s.fr: chleroy set sender to christophe.leroy@csgroup.eu using -f From: Christophe Leroy To: Benjamin Herrenschmidt , Paul Mackerras , Michael Ellerman Cc: Christophe Leroy , linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org Subject: [PATCH] powerpc: Set max_mapnr correctly Date: Tue, 12 Oct 2021 12:40:37 +0200 Message-Id: <77d99037782ac4b3c3b0124fc4ae80ce7b760b05.1634035228.git.christophe.leroy@csgroup.eu> X-Mailer: git-send-email 2.31.1 MIME-Version: 1.0 X-Developer-Signature: v=1; a=ed25519-sha256; t=1634035236; l=874; s=20211009; h=from:subject:message-id; bh=n9w/eJduhSwMHOhWBmX4XH+picWww91P1yn9wgz5lm8=; b=lxrjCZXZd4LnrftiiFXwlidGxe/m3FGSye7KaSn8pBSzhzM20+6BkCEJ9xZKNf673SuWttjB1dbH BoShmtbzAAMXRTffhQ5XoMgU8/y7oJhAtewlmOpGHDyw8QEwH2bU X-Developer-Key: i=christophe.leroy@csgroup.eu; a=ed25519; pk=HIzTzUj91asvincQGOFx6+ZF5AoUuP9GdOtQChs7Mm0= Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org max_mapnr is used by virt_addr_valid() to check if a linear address is valid. It must only include lowmem PFNs, like other architectures. Problem detected on a system with 1G mem (Only 768M are mapped), with CONFIG_DEBUG_VIRTUAL and CONFIG_TEST_DEBUG_VIRTUAL, it didn't report virt_to_phys(VMALLOC_START), VMALLOC_START being 0xf1000000. Signed-off-by: Christophe Leroy --- arch/powerpc/mm/mem.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/powerpc/mm/mem.c b/arch/powerpc/mm/mem.c index c3c4e31462ec..889f36b55df9 100644 --- a/arch/powerpc/mm/mem.c +++ b/arch/powerpc/mm/mem.c @@ -256,7 +256,7 @@ void __init mem_init(void) #endif high_memory = (void *) __va(max_low_pfn * PAGE_SIZE); - set_max_mapnr(max_pfn); + set_max_mapnr(max_low_pfn); kasan_late_init(); -- 2.31.1