btrfs: device add and remove: use GFP_KERNEL

We can safely use GFP_KERNEL in the functions called from the ioctl
handlers.

Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
David Sterba 2016-02-11 14:25:38 +01:00
commit 78f2c9e6db