From c45653c341f5c8a0ce19c8f0ad4678640849cb86 Mon Sep 17 00:00:00 2001
From: Nikolay Borisov <kernel@kyup.com>
Date: Thu, 2 Jul 2015 01:34:07 -0400
Subject: [PATCH] ext4: avoid deadlocks in the writeback path by using
 sb_getblk_gfp

Switch ext4 to using sb_getblk_gfp with GFP_NOFS added to fix possible
deadlocks in the page writeback path.

Signed-off-by: Nikolay Borisov <kernel@kyup.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Cc: stable@vger.kernel.org
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