gfs2: Replace gfs2_lblk_to_dblk with gfs2_get_extent

We don't need two very similar functions for mapping logical blocks to physical
blocks.
Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>

fs/gfs2/bmap.c

@@ -961,30 +961,6 @@ static int __gfs2_iomap_get(struct inode *inode, loff_t pos, loff_t length,
 	goto out;
 }
 
-/**
- * gfs2_lblk_to_dblk - convert logical block to disk block
- * @inode: the inode of the file we're mapping
- * @lblock: the block relative to the start of the file
- * @dblock: the returned dblock, if no error
- *
- * This function maps a single block from a file logical block (relative to
- * the start of the file) to a file system absolute block using iomap.
- *
- * Returns: the absolute file system block, or an error
- */
-int gfs2_lblk_to_dblk(struct inode *inode, u32 lblock, u64 *dblock)
-{
-	struct iomap iomap = { };
-	loff_t pos = (loff_t)lblock << inode->i_blkbits;
-	int ret;
-
-	ret = gfs2_iomap_get(inode, pos, i_blocksize(inode), &iomap);
-	if (ret == 0)
-		*dblock = iomap.addr >> inode->i_blkbits;
-
-	return ret;
-}
-
 static int gfs2_write_lock(struct inode *inode)
 {
 	struct gfs2_inode *ip = GFS2_I(inode);

fs/gfs2/bmap.h

@@ -66,6 +66,5 @@ extern int gfs2_write_alloc_required(struct gfs2_inode *ip, u64 offset,
 extern int gfs2_map_journal_extents(struct gfs2_sbd *sdp, struct gfs2_jdesc *jd);
 extern void gfs2_free_journal_extents(struct gfs2_jdesc *jd);
 extern int __gfs2_punch_hole(struct file *file, loff_t offset, loff_t length);
-extern int gfs2_lblk_to_dblk(struct inode *inode, u32 lblock, u64 *dblock);
 
 #endif /* __BMAP_DOT_H__ */

fs/gfs2/log.c

@@ -859,7 +859,11 @@ void gfs2_write_log_header(struct gfs2_sbd *sdp, struct gfs2_jdesc *jd,
 	if (!list_empty(&jd->extent_list))
 		dblock = gfs2_log_bmap(jd, lblock);
 	else {
-		int ret = gfs2_lblk_to_dblk(jd->jd_inode, lblock, &dblock);
+		unsigned int extlen;
+		int ret;
+
+		extlen = 1;
+		ret = gfs2_get_extent(jd->jd_inode, lblock, &dblock, &extlen);
 		if (gfs2_assert_withdraw(sdp, ret == 0))
 			return;
 	}