vfs: remove get_xip_mem

All callers of get_xip_mem() are now gone.  Remove checks for it,
initialisers of it, documentation of it and the only implementation of it.
 Also remove mm/filemap_xip.c as it is now empty.  Also remove
documentation of the long-gone get_xip_page().

Signed-off-by: Matthew Wilcox <matthew.r.wilcox@intel.com>
Cc: Andreas Dilger <andreas.dilger@intel.com>
Cc: Boaz Harrosh <boaz@plexistor.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Dave Chinner <david@fromorbit.com>
Cc: Jan Kara <jack@suse.cz>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Cc: Randy Dunlap <rdunlap@infradead.org>
Cc: Ross Zwisler <ross.zwisler@linux.intel.com>
Cc: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 0 insertions, 2 deletions

diff --git a/include/linux/fs.h b/include/linux/fs.h
index 2c8f9055af38..9772d655f444 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -362,8 +362,6 @@ struct address_space_operations {
         int (*releasepage) (struct page *, gfp_t);
         void (*freepage)(struct page *);
         ssize_t (*direct_IO)(int, struct kiocb *, struct iov_iter *iter, loff_t offset);
-        int (*get_xip_mem)(struct address_space *, pgoff_t, int,
-                                                void **, unsigned long *);
         /*
          * migrate the contents of a page to the specified target. If
          * migrate_mode is MIGRATE_ASYNC, it must not block.