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 36C6D52FE40; Wed, 23 Sep 2026 14:14:54 +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=1790172895; cv=none; b=tj/CqbrxODeHEO0chLQFWlKfxpeS6EzO41wWTq+M7qni8/z0DeHucm6jmQkFboIMPJobaCoesCT3NWQ3kaIwtN0nX7u5SJ8RnydKNvq7A+U2KkwhNrUp/LP1PxzqeFln9Qy+3dY97aQlBB7Crek7J6Y+Xqi4wUgcm2I6UNR2BLc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790172895; c=relaxed/simple; bh=AUigs4q18l73qWJe3DuwFhXtnKqcRQi7MdoNSVINbZQ=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=jRd86Pl9k3nvScVREYA4s//1fncBtW8Lud5Zfpt3z7FYWfcLoa/7BLcCYgDNCtcLOB2RRR1haIJB7fUHcu+Xkuq/hVb//lxBnSyZDzMVbA6FrgIb12PdLb7jkJp0kdOlHdaTvYBplvDFcD3nR/S5Y5nbYGYO6wLhojgoUk0RnT8= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=G1eRUvL0; 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="G1eRUvL0" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 7B4121F000FF; Wed, 23 Sep 2026 14:14:53 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1790172894; bh=sVJkvYidCONGnPc2Ov44NLI7Y535rL8QH5BAc5Qo6so=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=G1eRUvL0Ou6nRwwoJ93o/+qQsBl0c5s+qmfajqvCVKzUP+Mjw+xzVYaJBYwKkd/yv yv966knTnl7h4YRc9RKUfu4T0wuIiBK24m10I76d00SJBmzww79gUDX+MsXHHysQWh 1ye9Ki0PBqcvoDyhM7Wy9vHz3KHFriUXy8b69lig= 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 7.2 092/438] mm: memblock: show all region flags in debugfs Date: Wed, 23 Sep 2026 16:01:53 +0200 Message-ID: <20260923140647.163070363@linuxfoundation.org> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260923140644.756254324@linuxfoundation.org> References: <20260923140644.756254324@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 7.2-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 6349c48154f4b..a8d1992ba7a13 100644 --- a/mm/memblock.c +++ b/mm/memblock.c @@ -2823,14 +2823,18 @@ 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