make new_sync_{read,write}() static

All places outside of core VFS that checked ->read and ->write for being NULL or
called the methods directly are gone now, so NULL {read,write} with non-NULL
{read,write}_iter will do the right thing in all cases.

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

diff --cc Documentation/filesystems/porting
Simple merge

diff --cc arch/s390/hypfs/inode.c
Simple merge

diff --cc drivers/char/mem.c
Simple merge

diff --cc drivers/char/raw.c
Simple merge

diff --cc drivers/net/macvtap.c
Simple merge

diff --cc drivers/net/tun.c
Simple merge

diff --cc drivers/staging/lustre/lustre/llite/file.c
Simple merge

diff --cc drivers/usb/gadget/function/f_fs.c
Simple merge

diff --cc drivers/usb/gadget/legacy/inode.c
Simple merge

diff --cc fs/9p/vfs_file.c
Simple merge

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

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

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

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

diff --cc fs/block_dev.c
Simple merge

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

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

diff --cc fs/cifs/cifsfs.c
Simple merge

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

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

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

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

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

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

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

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

diff --cc fs/fuse/cuse.c
Simple merge

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

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

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

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

diff --cc fs/hostfs/hostfs_kern.c
Simple merge

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

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

diff --cc fs/jffs2/file.c
Simple merge

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

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

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

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

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

diff --cc fs/nfs/nfs4file.c
Simple merge

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

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

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

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

diff --cc fs/pipe.c
Simple merge

diff --cc fs/ramfs/file-mmu.c
Simple merge

diff --cc fs/ramfs/file-nommu.c
Simple merge

diff --cc fs/read_write.c
Simple merge

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

diff --cc fs/romfs/mmap-nommu.c
Simple merge

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

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

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

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

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

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

diff --cc mm/shmem.c
Simple merge

diff --cc net/socket.c
Simple merge