ext4: remove no longer used functions in inode.c

The functions ext4_block_truncate_page() and ext4_block_zero_page_range()
are no longer used, so remove them.

Signed-off-by: Zheng Liu <wenqing.lz@taobao.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>

2 files changed, 0 insertions, 124 deletions

diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h
index 5b0e26a1272d..ae2407f4502a 100644
--- a/fs/ext4/ext4.h
+++ b/fs/ext4/ext4.h
@@ -1880,10 +1880,6 @@ extern int ext4_alloc_da_blocks(struct inode *inode);
 extern void ext4_set_aops(struct inode *inode);
 extern int ext4_writepage_trans_blocks(struct inode *);
 extern int ext4_chunk_trans_blocks(struct inode *, int nrblocks);
-extern int ext4_block_truncate_page(handle_t *handle,
-                struct address_space *mapping, loff_t from);
-extern int ext4_block_zero_page_range(handle_t *handle,
-                struct address_space *mapping, loff_t from, loff_t length);
 extern int ext4_discard_partial_page_buffers(handle_t *handle,
                 struct address_space *mapping, loff_t from,
                 loff_t length, int flags);
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index ef9e8fdddfba..e6cc24dfa98d 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -3301,126 +3301,6 @@ next:
         return err;
 }
 
-/*
- * ext4_block_truncate_page() zeroes out a mapping from file offset `from'
- * up to the end of the block which corresponds to `from'.
- * This required during truncate. We need to physically zero the tail end
- * of that block so it doesn't yield old data if the file is later grown.
- */
-int ext4_block_truncate_page(handle_t *handle,
-                struct address_space *mapping, loff_t from)
-{
-        unsigned offset = from & (PAGE_CACHE_SIZE-1);
-        unsigned length;
-        unsigned blocksize;
-        struct inode *inode = mapping->host;
-
-        blocksize = inode->i_sb->s_blocksize;
-        length = blocksize - (offset & (blocksize - 1));
-
-        return ext4_block_zero_page_range(handle, mapping, from, length);
-}
-
-/*
- * ext4_block_zero_page_range() zeros out a mapping of length 'length'
- * starting from file offset 'from'.  The range to be zero'd must
- * be contained with in one block.  If the specified range exceeds
- * the end of the block it will be shortened to end of the block
- * that cooresponds to 'from'
- */
-int ext4_block_zero_page_range(handle_t *handle,
-                struct address_space *mapping, loff_t from, loff_t length)
-{
-        ext4_fsblk_t index = from >> PAGE_CACHE_SHIFT;
-        unsigned offset = from & (PAGE_CACHE_SIZE-1);
-        unsigned blocksize, max, pos;
-        ext4_lblk_t iblock;
-        struct inode *inode = mapping->host;
-        struct buffer_head *bh;
-        struct page *page;
-        int err = 0;
-
-        page = find_or_create_page(mapping, from >> PAGE_CACHE_SHIFT,
-                                   mapping_gfp_mask(mapping) & ~__GFP_FS);
-        if (!page)
-                return -ENOMEM;
-
-        blocksize = inode->i_sb->s_blocksize;
-        max = blocksize - (offset & (blocksize - 1));
-
-        /*
-         * correct length if it does not fall between
-         * 'from' and the end of the block
-         */
-        if (length > max || length < 0)
-                length = max;
-
-        iblock = index << (PAGE_CACHE_SHIFT - inode->i_sb->s_blocksize_bits);
-
-        if (!page_has_buffers(page))
-                create_empty_buffers(page, blocksize, 0);
-
-        /* Find the buffer that contains "offset" */
-        bh = page_buffers(page);
-        pos = blocksize;
-        while (offset >= pos) {
-                bh = bh->b_this_page;
-                iblock++;
-                pos += blocksize;
-        }
-
-        err = 0;
-        if (buffer_freed(bh)) {
-                BUFFER_TRACE(bh, "freed: skip");
-                goto unlock;
-        }
-
-        if (!buffer_mapped(bh)) {
-                BUFFER_TRACE(bh, "unmapped");
-                ext4_get_block(inode, iblock, bh, 0);
-                /* unmapped? It's a hole - nothing to do */
-                if (!buffer_mapped(bh)) {
-                        BUFFER_TRACE(bh, "still unmapped");
-                        goto unlock;
-                }
-        }
-
-        /* Ok, it's mapped. Make sure it's up-to-date */
-        if (PageUptodate(page))
-                set_buffer_uptodate(bh);
-
-        if (!buffer_uptodate(bh)) {
-                err = -EIO;
-                ll_rw_block(READ, 1, &bh);
-                wait_on_buffer(bh);
-                /* Uhhuh. Read error. Complain and punt. */
-                if (!buffer_uptodate(bh))
-                        goto unlock;
-        }
-
-        if (ext4_should_journal_data(inode)) {
-                BUFFER_TRACE(bh, "get write access");
-                err = ext4_journal_get_write_access(handle, bh);
-                if (err)
-                        goto unlock;
-        }
-
-        zero_user(page, offset, length);
-
-        BUFFER_TRACE(bh, "zeroed end of block");
-
-        err = 0;
-        if (ext4_should_journal_data(inode)) {
-                err = ext4_handle_dirty_metadata(handle, inode, bh);
-        } else
-                mark_buffer_dirty(bh);
-
-unlock:
-        unlock_page(page);
-        page_cache_release(page);
-        return err;
-}
-
 int ext4_can_truncate(struct inode *inode)
 {
         if (S_ISREG(inode->i_mode))