Remove rw from {,__,do_}blockdev_direct_IO()

Most filesystems call through to these at some point, so we'll start
here.

Signed-off-by: Omar Sandoval <osandov@osandov.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

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

diff --cc fs/block_dev.c
Simple merge

diff --cc fs/btrfs/inode.c
Simple merge

diff --cc fs/direct-io.c
Simple merge

diff --cc fs/ext2/inode.c
Simple merge

diff --cc fs/ext3/inode.c
Simple merge

diff --cc fs/ext4/indirect.c
Simple merge

diff --cc fs/ext4/inode.c
Simple merge

diff --cc fs/f2fs/data.c
Simple merge

diff --cc fs/fat/inode.c
Simple merge

diff --cc fs/gfs2/aops.c
Simple merge

diff --cc fs/hfs/inode.c
Simple merge

diff --cc fs/hfsplus/inode.c
Simple merge

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

diff --cc fs/nilfs2/inode.c
Simple merge

diff --cc fs/ocfs2/aops.c
Simple merge

diff --cc fs/reiserfs/inode.c
Simple merge

diff --cc fs/udf/inode.c
Simple merge

diff --cc fs/xfs/xfs_aops.c
Simple merge

diff --cc include/linux/fs.h
Simple merge