From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 6B66A2874FD; Mon, 5 May 2025 23:19:06 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1746487146; cv=none; b=r9NzszOLxWbUEpOISXuP93iDFuPcLN7zjzsHoaM91ddwzpMzE6uZZDxMsJOrmiMcH1jE/i/t3eo7tv2Uq6n39wsVOgeaYdb852pFQ+cPg2mLcPK014CBWjxCij76W8D4QMyGZlbGAh1JuV5gWRbzRMT2efgpwVezrUS1heKJDGM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1746487146; c=relaxed/simple; bh=ZkpvWBITQF3SKmzOdsoI+6jMbMBW9mXE+YR6udQhi5k=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=ca94YwPwcY6drFxfVRP+JDrH76Hs+qHk/l9LCkdKy5619Y08kngWwE25HzvYDNWXLL3rfm5rS0jKcSQXZ6Bo/xHCZW9VtnkjvJyjiJzxLRat1Z2HCc78oliSuhQmZo9u4wEzo2fiyA+6YG8h8MhP9hMmBFBYmy/tAg6QVHFnkrM= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=TBgvUz8i; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="TBgvUz8i" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 5750CC4CEED; Mon, 5 May 2025 23:19:04 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1746487145; bh=ZkpvWBITQF3SKmzOdsoI+6jMbMBW9mXE+YR6udQhi5k=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=TBgvUz8inIu4dCrFegoVNNe0j8Sr0g6c/KPWsgA7rzuPLbRjKxizY8+eLpwOtSCHg RkMW8cDHgdomZsb6qw1cduHNsIhhoA+CYUPjODgAjk4HHO4ZVT+K4tYLFoVgHIc8jZ e1xsvodKX286Bo5KZncNHxFk11pSUKAplRHtL1OCXbt4i0zLsCTEsrKpLoitBA6iwc eGKdWqfCciaQHjOWzWXD7A4umXhpzi4lssJjk9u6p7eGukqgyCA/JsPCzXCZTygnDP nFudmB8xcAeS5aBdUpzbdt8/gVKjiU52U5FWgkcQSbDCsBh072R8R9NCSCZm9kRzmb HTPg24njePH5g== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Tiwei Bie , Johannes Berg , Sasha Levin , richard@nod.at, anton.ivanov@cambridgegreys.com, johannes@sipsolutions.net, akpm@linux-foundation.org, rppt@kernel.org, dave.hansen@linux.intel.com, benjamin.berg@intel.com, richard.weiyang@gmail.com, kevin.brodsky@arm.com, linux-um@lists.infradead.org Subject: [PATCH AUTOSEL 5.10 023/114] um: Update min_low_pfn to match changes in uml_reserved Date: Mon, 5 May 2025 19:16:46 -0400 Message-Id: <20250505231817.2697367-23-sashal@kernel.org> X-Mailer: git-send-email 2.39.5 In-Reply-To: <20250505231817.2697367-1-sashal@kernel.org> References: <20250505231817.2697367-1-sashal@kernel.org> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore X-stable-base: Linux 5.10.237 Content-Transfer-Encoding: 8bit From: Tiwei Bie [ Upstream commit e82cf3051e6193f61e03898f8dba035199064d36 ] When uml_reserved is updated, min_low_pfn must also be updated accordingly. Otherwise, min_low_pfn will not accurately reflect the lowest available PFN. Signed-off-by: Tiwei Bie Link: https://patch.msgid.link/20250221041855.1156109-1-tiwei.btw@antgroup.com Signed-off-by: Johannes Berg Signed-off-by: Sasha Levin --- arch/um/kernel/mem.c | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/um/kernel/mem.c b/arch/um/kernel/mem.c index 9242dc91d7519..268a238f4f9cf 100644 --- a/arch/um/kernel/mem.c +++ b/arch/um/kernel/mem.c @@ -49,6 +49,7 @@ void __init mem_init(void) map_memory(brk_end, __pa(brk_end), uml_reserved - brk_end, 1, 1, 0); memblock_free(__pa(brk_end), uml_reserved - brk_end); uml_reserved = brk_end; + min_low_pfn = PFN_UP(__pa(uml_reserved)); /* this will put all low memory onto the freelists */ memblock_free_all(); -- 2.39.5