From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.linuxfoundation.org ([140.211.169.12]:47098 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754930AbbG3AZX (ORCPT ); Wed, 29 Jul 2015 20:25:23 -0400 Subject: Patch "bufferhead: Add _gfp version for sb_getblk()" has been added to the 4.1-stable tree To: kernel@kyup.com, gregkh@linuxfoundation.org, tytso@mit.edu Cc: , From: Date: Wed, 29 Jul 2015 17:25:21 -0700 Message-ID: <1438215921218231@kroah.com> MIME-Version: 1.0 Content-Type: text/plain; charset=ANSI_X3.4-1968 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org List-ID: This is a note to let you know that I've just added the patch titled bufferhead: Add _gfp version for sb_getblk() to the 4.1-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: bufferhead-add-_gfp-version-for-sb_getblk.patch and it can be found in the queue-4.1 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let know about it. >>From bd7ade3cd9b0850264306f5c2b79024a417b6396 Mon Sep 17 00:00:00 2001 From: Nikolay Borisov Date: Thu, 2 Jul 2015 01:32:44 -0400 Subject: bufferhead: Add _gfp version for sb_getblk() From: Nikolay Borisov commit bd7ade3cd9b0850264306f5c2b79024a417b6396 upstream. sb_getblk() is used during ext4 (and possibly other FSes) writeback paths. Sometimes such path require allocating memory and guaranteeing that such allocation won't block. Currently, however, there is no way to provide user flags for sb_getblk which could lead to deadlocks. This patch implements a sb_getblk_gfp with the only difference it can accept user-provided GFP flags. Signed-off-by: Nikolay Borisov Signed-off-by: Theodore Ts'o Signed-off-by: Greg Kroah-Hartman --- include/linux/buffer_head.h | 7 +++++++ 1 file changed, 7 insertions(+) --- a/include/linux/buffer_head.h +++ b/include/linux/buffer_head.h @@ -317,6 +317,13 @@ sb_getblk(struct super_block *sb, sector return __getblk_gfp(sb->s_bdev, block, sb->s_blocksize, __GFP_MOVABLE); } + +static inline struct buffer_head * +sb_getblk_gfp(struct super_block *sb, sector_t block, gfp_t gfp) +{ + return __getblk_gfp(sb->s_bdev, block, sb->s_blocksize, gfp); +} + static inline struct buffer_head * sb_find_get_block(struct super_block *sb, sector_t block) { Patches currently in stable-queue which might be from kernel@kyup.com are queue-4.1/bufferhead-add-_gfp-version-for-sb_getblk.patch queue-4.1/ext4-avoid-deadlocks-in-the-writeback-path-by-using-sb_getblk_gfp.patch