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>

3 files changed, 0 insertions, 49 deletions

diff --git a/fs/ext2/inode.c b/fs/ext2/inode.c
index 5ac0a3461b3c..59d6c7d43740 100644
--- a/fs/ext2/inode.c
+++ b/fs/ext2/inode.c
@@ -894,7 +894,6 @@ const struct address_space_operations ext2_aops = {
 
 const struct address_space_operations ext2_aops_xip = {
         .bmap                   = ext2_bmap,
-        .get_xip_mem            = ext2_get_xip_mem,
         .direct_IO              = ext2_direct_IO,
 };
 
diff --git a/fs/ext2/xip.c b/fs/ext2/xip.c
index 8cfca3a4cd58..132d4daf98c4 100644
--- a/fs/ext2/xip.c
+++ b/fs/ext2/xip.c
@@ -13,35 +13,6 @@
 #include "ext2.h"
 #include "xip.h"
 
-static inline long __inode_direct_access(struct inode *inode, sector_t block,
-                                void **kaddr, unsigned long *pfn, long size)
-{
-        struct block_device *bdev = inode->i_sb->s_bdev;
-        sector_t sector = block * (PAGE_SIZE / 512);
-        return bdev_direct_access(bdev, sector, kaddr, pfn, size);
-}
-
-static inline int
-__ext2_get_block(struct inode *inode, pgoff_t pgoff, int create,
-                   sector_t *result)
-{
-        struct buffer_head tmp;
-        int rc;
-
-        memset(&tmp, 0, sizeof(struct buffer_head));
-        tmp.b_size = 1 << inode->i_blkbits;
-        rc = ext2_get_block(inode, pgoff, &tmp, create);
-        *result = tmp.b_blocknr;
-
-        /* did we get a sparse block (hole in the file)? */
-        if (!tmp.b_blocknr && !rc) {
-                BUG_ON(create);
-                rc = -ENODATA;
-        }
-
-        return rc;
-}
-
 void ext2_xip_verify_sb(struct super_block *sb)
 {
         struct ext2_sb_info *sbi = EXT2_SB(sb);
@@ -54,19 +25,3 @@ void ext2_xip_verify_sb(struct super_block *sb)
                              "not supported by bdev");
         }
 }
-
-int ext2_get_xip_mem(struct address_space *mapping, pgoff_t pgoff, int create,
-                                void **kmem, unsigned long *pfn)
-{
-        long rc;
-        sector_t block;
-
-        /* first, retrieve the sector number */
-        rc = __ext2_get_block(mapping->host, pgoff, create, &block);
-        if (rc)
-                return rc;
-
-        /* retrieve address of the target data */
-        rc = __inode_direct_access(mapping->host, block, kmem, pfn, PAGE_SIZE);
-        return (rc < 0) ? rc : 0;
-}
diff --git a/fs/ext2/xip.h b/fs/ext2/xip.h
index b2592f2f3c9d..e7b9f0a2cc54 100644
--- a/fs/ext2/xip.h
+++ b/fs/ext2/xip.h
@@ -12,10 +12,7 @@ static inline int ext2_use_xip (struct super_block *sb)
         struct ext2_sb_info *sbi = EXT2_SB(sb);
         return (sbi->s_mount_opt & EXT2_MOUNT_XIP);
 }
-int ext2_get_xip_mem(struct address_space *, pgoff_t, int,
-                                void **, unsigned long *);
 #else
 #define ext2_xip_verify_sb(sb)                  do { } while (0)
 #define ext2_use_xip(sb)                        0
-#define ext2_get_xip_mem                        NULL
 #endif