tree 6533fd4e086b0cd587d2df8a1ec5b5a2ef3141d4
parent 0f0ff9a9f3fa2ec6f427603fd521d5f3a0b076d1
author Nikolay Borisov <kernel@kyup.com> 1435815164 -0400
committer Theodore Ts'o <tytso@mit.edu> 1435815164 -0400

bufferhead: Add _gfp version for sb_getblk()

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