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 10A403BA891; Mon, 5 May 2025 23:22:23 +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=1746487344; cv=none; b=RttU+hD8ed9xHKt/Lj05UxqgDNVhViILwizkuIrQ+41WFtwG8XtKJNe87wCp1ZP8Ue8z0QfYrbHCdN+sK8UdHSuB5YgC6rrPrfhG8Is9S7pD0ZEH9l86JpjDLmP+Bufuw7SpcR/cndIuzrYnaTfmTBv9lc6Wq2FVbmWwHekE4Tg= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1746487344; c=relaxed/simple; bh=dhO1wySfaom7bX0z5B2dpNT2HGt71Dc6VZn6YqH1lgI=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=ii6BzofR3shYlIrU0v0SSWaVv5QPtrVQ+7SU9826+S4F+Gg23n5f/RAwhVd+LOHh1PpEZQyeJ90pWJOU7m13AAAW8STvS6Laus6Li0WTbKeHbAKo1TcX7TPbYdZ9NFryUN36EROcEge1N7CfgNFRbg9HOEK3hWt3X7W5SciD/mY= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=Pm69Mmf7; 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="Pm69Mmf7" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 605FFC4CEE4; Mon, 5 May 2025 23:22:21 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1746487342; bh=dhO1wySfaom7bX0z5B2dpNT2HGt71Dc6VZn6YqH1lgI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Pm69Mmf7cPq4nylToYoYWEqM5zGM6MzPyHAgrFywlKUKQGIgTwhb2lxvzxbbloPUD Iz1IEkDRfyxjDt9pYfwUHt4FiG1WZfoN2D63XXtji6w6HbN00hGW9Ao6YxyeFsx8Je DpgXsKQBZPCjIlXPgVgxfgvoZdaYneJivwyLE9hzu9A/Ci3DrfNhuD0cTf/K1bqO8U hrbIaI6UJrR4vv/GAZwKXKq/8bV9XSJIpLm+cnYcM1wfgmJmt0yQPmG73aF7T3O31u 0DN6kWI/l+nXlARbZzxwNffCCeWRXTNxetl29SUK391hVJ02WR0/VrA1QmhRWZZFL9 6xHI1M1MJpB/A== 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, rppt@kernel.org, dave.hansen@linux.intel.com, akpm@linux-foundation.org, richard.weiyang@gmail.com, kevin.brodsky@arm.com, benjamin.berg@intel.com, linux-um@lists.infradead.org Subject: [PATCH AUTOSEL 5.4 17/79] um: Update min_low_pfn to match changes in uml_reserved Date: Mon, 5 May 2025 19:20:49 -0400 Message-Id: <20250505232151.2698893-17-sashal@kernel.org> X-Mailer: git-send-email 2.39.5 In-Reply-To: <20250505232151.2698893-1-sashal@kernel.org> References: <20250505232151.2698893-1-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 5.4.293 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 417ff647fb377..06fb50218136d 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