xfs: fix confusing variable names in xfs_rmap_item.c

Variable names in this code module are inconsistent and confusing.
xfs_map_extent describe file mappings, so rename them "map".
xfs_rmap_intents describe block mapping intents, so rename them "ri".
Signed-off-by: Darrick J. Wong <djwong@kernel.org>

fs/xfs/xfs_rmap_item.c

@@ -244,40 +244,40 @@ xfs_trans_get_rud(
 /* Set the map extent flags for this reverse mapping. */
 static void
 xfs_trans_set_rmap_flags(
-	struct xfs_map_extent		*rmap,
+	struct xfs_map_extent		*map,
 	enum xfs_rmap_intent_type	type,
 	int				whichfork,
 	xfs_exntst_t			state)
 {
-	rmap->me_flags = 0;
+	map->me_flags = 0;
 	if (state == XFS_EXT_UNWRITTEN)
-		rmap->me_flags |= XFS_RMAP_EXTENT_UNWRITTEN;
+		map->me_flags |= XFS_RMAP_EXTENT_UNWRITTEN;
 	if (whichfork == XFS_ATTR_FORK)
-		rmap->me_flags |= XFS_RMAP_EXTENT_ATTR_FORK;
+		map->me_flags |= XFS_RMAP_EXTENT_ATTR_FORK;
 	switch (type) {
 	case XFS_RMAP_MAP:
-		rmap->me_flags |= XFS_RMAP_EXTENT_MAP;
+		map->me_flags |= XFS_RMAP_EXTENT_MAP;
 		break;
 	case XFS_RMAP_MAP_SHARED:
-		rmap->me_flags |= XFS_RMAP_EXTENT_MAP_SHARED;
+		map->me_flags |= XFS_RMAP_EXTENT_MAP_SHARED;
 		break;
 	case XFS_RMAP_UNMAP:
-		rmap->me_flags |= XFS_RMAP_EXTENT_UNMAP;
+		map->me_flags |= XFS_RMAP_EXTENT_UNMAP;
 		break;
 	case XFS_RMAP_UNMAP_SHARED:
-		rmap->me_flags |= XFS_RMAP_EXTENT_UNMAP_SHARED;
+		map->me_flags |= XFS_RMAP_EXTENT_UNMAP_SHARED;
 		break;
 	case XFS_RMAP_CONVERT:
-		rmap->me_flags |= XFS_RMAP_EXTENT_CONVERT;
+		map->me_flags |= XFS_RMAP_EXTENT_CONVERT;
 		break;
 	case XFS_RMAP_CONVERT_SHARED:
-		rmap->me_flags |= XFS_RMAP_EXTENT_CONVERT_SHARED;
+		map->me_flags |= XFS_RMAP_EXTENT_CONVERT_SHARED;
 		break;
 	case XFS_RMAP_ALLOC:
-		rmap->me_flags |= XFS_RMAP_EXTENT_ALLOC;
+		map->me_flags |= XFS_RMAP_EXTENT_ALLOC;
 		break;
 	case XFS_RMAP_FREE:
-		rmap->me_flags |= XFS_RMAP_EXTENT_FREE;
+		map->me_flags |= XFS_RMAP_EXTENT_FREE;
 		break;
 	default:
 		ASSERT(0);
@@ -335,7 +335,7 @@ STATIC void
 xfs_rmap_update_log_item(
 	struct xfs_trans		*tp,
 	struct xfs_rui_log_item		*ruip,
-	struct xfs_rmap_intent		*rmap)
+	struct xfs_rmap_intent		*ri)
 {
 	uint				next_extent;
 	struct xfs_map_extent		*map;
@@ -351,12 +351,12 @@ xfs_rmap_update_log_item(
 	next_extent = atomic_inc_return(&ruip->rui_next_extent) - 1;
 	ASSERT(next_extent < ruip->rui_format.rui_nextents);
 	map = &ruip->rui_format.rui_extents[next_extent];
-	map->me_owner = rmap->ri_owner;
-	map->me_startblock = rmap->ri_bmap.br_startblock;
-	map->me_startoff = rmap->ri_bmap.br_startoff;
-	map->me_len = rmap->ri_bmap.br_blockcount;
-	xfs_trans_set_rmap_flags(map, rmap->ri_type, rmap->ri_whichfork,
-			rmap->ri_bmap.br_state);
+	map->me_owner = ri->ri_owner;
+	map->me_startblock = ri->ri_bmap.br_startblock;
+	map->me_startoff = ri->ri_bmap.br_startoff;
+	map->me_len = ri->ri_bmap.br_blockcount;
+	xfs_trans_set_rmap_flags(map, ri->ri_type, ri->ri_whichfork,
+			ri->ri_bmap.br_state);
 }
 
 static struct xfs_log_item *
@@ -368,15 +368,15 @@ xfs_rmap_update_create_intent(
 {
 	struct xfs_mount		*mp = tp->t_mountp;
 	struct xfs_rui_log_item		*ruip = xfs_rui_init(mp, count);
-	struct xfs_rmap_intent		*rmap;
+	struct xfs_rmap_intent		*ri;
 
 	ASSERT(count > 0);
 
 	xfs_trans_add_item(tp, &ruip->rui_item);
 	if (sort)
 		list_sort(mp, items, xfs_rmap_update_diff_items);
-	list_for_each_entry(rmap, items, ri_list)
-		xfs_rmap_update_log_item(tp, ruip, rmap);
+	list_for_each_entry(ri, items, ri_list)
+		xfs_rmap_update_log_item(tp, ruip, ri);
 	return &ruip->rui_item;
 }
 
@@ -398,13 +398,14 @@ xfs_rmap_update_finish_item(
 	struct list_head		*item,
 	struct xfs_btree_cur		**state)
 {
-	struct xfs_rmap_intent		*rmap;
+	struct xfs_rmap_intent		*ri;
 	int				error;
 
-	rmap = container_of(item, struct xfs_rmap_intent, ri_list);
-	error = xfs_trans_log_finish_rmap_update(tp, RUD_ITEM(done), rmap,
+	ri = container_of(item, struct xfs_rmap_intent, ri_list);
+
+	error = xfs_trans_log_finish_rmap_update(tp, RUD_ITEM(done), ri,
 			state);
-	kmem_cache_free(xfs_rmap_intent_cache, rmap);
+	kmem_cache_free(xfs_rmap_intent_cache, ri);
 	return error;
 }
 
@@ -421,10 +422,10 @@ STATIC void
 xfs_rmap_update_cancel_item(
 	struct list_head		*item)
 {
-	struct xfs_rmap_intent		*rmap;
+	struct xfs_rmap_intent		*ri;
 
-	rmap = container_of(item, struct xfs_rmap_intent, ri_list);
-	kmem_cache_free(xfs_rmap_intent_cache, rmap);
+	ri = container_of(item, struct xfs_rmap_intent, ri_list);
+	kmem_cache_free(xfs_rmap_intent_cache, ri);
 }
 
 const struct xfs_defer_op_type xfs_rmap_update_defer_type = {
@@ -441,15 +442,15 @@ const struct xfs_defer_op_type xfs_rmap_update_defer_type = {
 static inline bool
 xfs_rui_validate_map(
 	struct xfs_mount		*mp,
-	struct xfs_map_extent		*rmap)
+	struct xfs_map_extent		*map)
 {
 	if (!xfs_has_rmapbt(mp))
 		return false;
 
-	if (rmap->me_flags & ~XFS_RMAP_EXTENT_FLAGS)
+	if (map->me_flags & ~XFS_RMAP_EXTENT_FLAGS)
 		return false;
 
-	switch (rmap->me_flags & XFS_RMAP_EXTENT_TYPE_MASK) {
+	switch (map->me_flags & XFS_RMAP_EXTENT_TYPE_MASK) {
 	case XFS_RMAP_EXTENT_MAP:
 	case XFS_RMAP_EXTENT_MAP_SHARED:
 	case XFS_RMAP_EXTENT_UNMAP:
@@ -463,14 +464,14 @@ xfs_rui_validate_map(
 		return false;
 	}
 
-	if (!XFS_RMAP_NON_INODE_OWNER(rmap->me_owner) &&
-	    !xfs_verify_ino(mp, rmap->me_owner))
+	if (!XFS_RMAP_NON_INODE_OWNER(map->me_owner) &&
+	    !xfs_verify_ino(mp, map->me_owner))
 		return false;
 
-	if (!xfs_verify_fileext(mp, rmap->me_startoff, rmap->me_len))
+	if (!xfs_verify_fileext(mp, map->me_startoff, map->me_len))
 		return false;
 
-	return xfs_verify_fsbext(mp, rmap->me_startblock, rmap->me_len);
+	return xfs_verify_fsbext(mp, map->me_startblock, map->me_len);
 }
 
 /*
@@ -593,18 +594,18 @@ xfs_rui_item_relog(
 {
 	struct xfs_rud_log_item		*rudp;
 	struct xfs_rui_log_item		*ruip;
-	struct xfs_map_extent		*extp;
+	struct xfs_map_extent		*map;
 	unsigned int			count;
 
 	count = RUI_ITEM(intent)->rui_format.rui_nextents;
-	extp = RUI_ITEM(intent)->rui_format.rui_extents;
+	map = RUI_ITEM(intent)->rui_format.rui_extents;
 
 	tp->t_flags |= XFS_TRANS_DIRTY;
 	rudp = xfs_trans_get_rud(tp, RUI_ITEM(intent));
 	set_bit(XFS_LI_DIRTY, &rudp->rud_item.li_flags);
 
 	ruip = xfs_rui_init(tp->t_mountp, count);
-	memcpy(ruip->rui_format.rui_extents, extp, count * sizeof(*extp));
+	memcpy(ruip->rui_format.rui_extents, map, count * sizeof(*map));
 	atomic_set(&ruip->rui_next_extent, count);
 	xfs_trans_add_item(tp, &ruip->rui_item);
 	set_bit(XFS_LI_DIRTY, &ruip->rui_item.li_flags);