BKL-removal: Use unlocked_ioctl for jfs

Convert jfs_ioctl over to not use the BKL. The only potential race
I could see was with two ioctls in parallel changing the flags
and losing the updates. Use the i_mutex to protect against this.

Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Dave Kleikamp <shaggy@linux.vnet.ibm.com>

diff --cc fs/jfs/file.c
Simple merge

diff --cc fs/jfs/ioctl.c
Simple merge

diff --cc fs/jfs/jfs_inode.h
Simple merge

diff --cc fs/jfs/namei.c
Simple merge