From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (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 A60E850B429; Wed, 23 Sep 2026 14:38:58 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790174340; cv=none; b=Knk8IcQ8JE/AsTuXHqmr3IEa/kY3IPSOuxmaMv97I6/Vw+R6bYyN7+/WaiiGoPxYzfEDu/OjS0o6LxcY6r3Uo4MEjzhyPQePW7EjsMn5JXKIRyyNvt6hoS5mX1DoZEW8U7Z53OCnUToKjeLKgO/NUQP6E8f8tyWra23CuTPUMe4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790174340; c=relaxed/simple; bh=OmqjJ9cRkP+8Bxn6jIKCCekU7bgXeSzj7y9gfJ5wNfk=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=FR95eBb/uoy5DEKDfcE6jJzQURC7WMF/tEOrjBAzg+RvnHCyVI31gsWvMERNt1a58qLdmPk7NJoisKf/I2Wf+aWyRwsfd1tav8RlqKs6bRL3XvXYPtMbcfRL8bwmuCSU6Xvdk1UmhVIPLFbp4VMe2sY1vN7MI16KrpTAAzezZzY= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=l5qUvo7/; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="l5qUvo7/" Received: by smtp.kernel.org (Postfix) with ESMTPSA id EC3D11F000FF; Wed, 23 Sep 2026 14:38:57 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1790174338; bh=i4w1dB+XbkhB4mKuazm3DVJqEBFsEysAUsp1ZDxXXHg=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=l5qUvo7/bQScBRFifHyKY6G2vqz5vA0OKGbNAfysnSP6bxZEpKFnHSXCnMgMt+ClW vN7Zr7WTQR6zZP1451OTMynCcy1Z5oceXD7+CZNmL7Y3yAOt5MY27YL0YnL5DlBrac w79MYwYU8/CQPOWF8VeB0pqy5KiRClbwX5h2QeSQ= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Meijing Zhao , "Mike Rapoport (Microsoft)" , Sasha Levin Subject: [PATCH 6.18 083/398] mm: memblock: show all region flags in debugfs Date: Wed, 23 Sep 2026 16:02:37 +0200 Message-ID: <20260923140645.586954715@linuxfoundation.org> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260923140643.441954610@linuxfoundation.org> References: <20260923140643.441954610@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.18-stable review patch. If anyone has any objections, please let me know. ------------------ From: Meijing Zhao [ Upstream commit e2d5b01f878d76bd1142e512a0b979a1d3cd0abf ] Commit 493f349e38d0 ("memblock: Add flags and nid info in memblock debugfs") made memblock_debug_show() stop after finding the first set flag. A memblock region can carry multiple flags, so the remaining flags are hidden from debugfs. Walk all bits in the region flags and print every set flag separated by "|". Keep walking beyond flagname[] so that a set flag without a known name is reported as UNKNOWN rather than silently ignored. Fixes: 493f349e38d0 ("memblock: Add flags and nid info in memblock debugfs") Signed-off-by: Meijing Zhao Link: https://patch.msgid.link/20260902075944.3742866-1-zhaomeijing100@gmail.com Signed-off-by: Mike Rapoport (Microsoft) Signed-off-by: Sasha Levin --- mm/memblock.c | 18 +++++++++++------- 1 file changed, 11 insertions(+), 7 deletions(-) diff --git a/mm/memblock.c b/mm/memblock.c index 757258d68425a..e2f15bbc274b5 100644 --- a/mm/memblock.c +++ b/mm/memblock.c @@ -2727,14 +2727,18 @@ static int memblock_debug_show(struct seq_file *m, void *private) else seq_printf(m, "%4c ", 'x'); if (reg->flags) { - for (j = 0; j < count; j++) { - if (reg->flags & (1U << j)) { - seq_printf(m, "%s\n", flagname[j]); - break; - } + unsigned int flags = reg->flags; + bool first = true; + + for (j = 0; flags; j++, flags >>= 1) { + if (!(flags & 1)) + continue; + if (!first) + seq_putc(m, '|'); + seq_puts(m, j < count ? flagname[j] : "UNKNOWN"); + first = false; } - if (j == count) - seq_printf(m, "%s\n", "UNKNOWN"); + seq_putc(m, '\n'); } else { seq_printf(m, "%s\n", "NONE"); } -- 2.53.0