From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=100.103.45.18 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1793829612; b=jF6HYyrtD6pKZh68DM94Yi2zj1msZ4C+4cFn9YLvh+Mla4fPNfbtXz25Yf4P3I9ykVUW 3qjJMmvf5XMpIjDYOdtp3XHaswQHph7f78A1bMtGfAU9r+icY5/mtgkEhwnRXQgymCeWB QRBUXBasCjPsUtVrobScqkmAI7GZoz7iEX1t7Ee0jRsgk3EThXPEAaiC++xoc9GngsD8i 1JFRmMp154tM8OlGOtpdwVvZyjO80KJv28om2EeRXLDTqK7OX5NdHU7nM7TpGFnvb5h3S 0Kp83XgNtw8nZYXtFp7qU3IBhoKt6iziBouiZ+qvnHDDjOpjHtZqzzyXnf9GebuOnOA== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1793829612; h=Received:DKIM-Signature:From:To:Cc:Subject:Date:Message-ID:X-Mailer: In-Reply-To:References:User-Agent:X-stable:X-Patchwork-Hint: MIME-Version:Content-Transfer-Encoding; bh=O2jam49ULyebCiMEL0VDLhAmKdjNAbnysFvSB3oeopM=; b=yTP+2AlEwA5510vHwzCxjn0ZNtNACSXlsu8ap2DzQNM1ZQN21KsSnC9nMhGN8rk4pYyX TWG103f3FgpkDF6qx2npYjnscXIn8YWW/2uCpVVLuPCsd5fqxiyKduzVeu+MQJZMdROQQ 1sxzWK49UpWtAxirFWye3jgfgWqSZoB20I9n9IWJ3NxFwIwTJMVFzpycAIERXL+vb99c3 Rec55xXDznuu9F3GAsmtRZ+zzLUgWjqmv07Z9HO0eoN7x8GqcAqYvL7afGRLlf2oBZtO+ qHbyGYIr+B+tL6g89sQi37+OJHLAtd7m+NqwKHDMbYETLesufKIXUpqdq+FYWgvX7tw== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass header.d=linuxfoundation.org header.i=@linuxfoundation.org header.a=rsa-sha256 header.s=korg header.b=fjiWhCUI; arc=none smtp.remote-ip=100.103.45.18 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 632AA608C99B; Wed, 4 Nov 2026 22:00:12 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key, unprotected) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.a=rsa-sha256 header.s=korg header.b=fjiWhCUI Received: by smtp.kernel.org (Postfix) with ESMTPSA id 100C01F000C1; Wed, 4 Nov 2026 22:00:11 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1793829612; bh=O2jam49ULyebCiMEL0VDLhAmKdjNAbnysFvSB3oeopM=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=fjiWhCUIiB/ADT7IESG+8HODB/yX5+YYYpMyp0aKQu+xz3MvsF/QJBMR0sviCVAWt 8fdnTiDC6rS4iaDr1/3+qkooYwMyevzP6KCY0u44tEj/vjeDZlXzuWLZyRmK3hoK3Z HK8FAZ6weZAcRdymwMiSRrsjX1jHLo1oXIhuCm/A= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Zhang Yi , Jan Kara , Theodore Tso , Sasha Levin Subject: [PATCH 6.18 0235/1005] ext4: use FGP_WRITEBEGIN for tail block zeroing Date: Wed, 4 Nov 2026 15:59:28 -0500 Message-ID: <20261104211050.434408166@linuxfoundation.org> X-Mailer: git-send-email 2.56.0 In-Reply-To: <20261104211043.516122098@linuxfoundation.org> References: <20261104211043.516122098@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore X-Mailing-List: patches@lists.linux.dev List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.18-stable review patch. If anyone has any objections, please let me know. ------------------ From: Zhang Yi [ Upstream commit e1cf7b5f5c8ad1e00d00c50c61c3e8fdc79cd422 ] ext4_load_tail_bh() returns a locked folio that callers immediately mutate through folio_zero_range() and mark_buffer_dirty(). Use FGP_WRITEBEGIN so that, on backing devices that require stable writes, __filemap_get_folio() waits for writeback to finish before returning the folio; on regular devices the wait is a no-op. Signed-off-by: Zhang Yi Reviewed-by: Jan Kara Link: https://patch.msgid.link/20260714080044.4038124-2-yi.zhang@huaweicloud.com Signed-off-by: Theodore Ts'o Signed-off-by: Sasha Levin --- fs/ext4/inode.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c index 2e3f7ba1a924b..c3fb5f16f6e39 100644 --- a/fs/ext4/inode.c +++ b/fs/ext4/inode.c @@ -4092,7 +4092,7 @@ static int __ext4_block_zero_page_range(handle_t *handle, int err = 0; folio = __filemap_get_folio(mapping, from >> PAGE_SHIFT, - FGP_LOCK | FGP_ACCESSED | FGP_CREAT, + FGP_WRITEBEGIN | FGP_ACCESSED, mapping_gfp_constraint(mapping, ~__GFP_FS)); if (IS_ERR(folio)) return PTR_ERR(folio); -- 2.53.0