libceph: Remove unused ceph_pagelist functions

ceph_pagelist_truncate() and ceph_pagelist_set_cursor() have been unused
since commit
39be95e ("ceph: ceph_pagelist_append might sleep while atomic")

Remove them.

Signed-off-by: Dr. David Alan Gilbert <[email protected]>
Reviewed-by: Ilya Dryomov <[email protected]>
Signed-off-by: Ilya Dryomov <[email protected]>

Author: Dr. David Alan Gilbert

include/linux/ceph/pagelist.h

@@ -17,12 +17,6 @@ struct ceph_pagelist {
 	refcount_t refcnt;
 };
 
-struct ceph_pagelist_cursor {
-	struct ceph_pagelist *pl;   /* pagelist, for error checking */
-	struct list_head *page_lru; /* page in list */
-	size_t room;		    /* room remaining to reset to */
-};
-
 struct ceph_pagelist *ceph_pagelist_alloc(gfp_t gfp_flags);
 
 extern void ceph_pagelist_release(struct ceph_pagelist *pl);
@@ -33,12 +27,6 @@ extern int ceph_pagelist_reserve(struct ceph_pagelist *pl, size_t space);
 
 extern int ceph_pagelist_free_reserve(struct ceph_pagelist *pl);
 
-extern void ceph_pagelist_set_cursor(struct ceph_pagelist *pl,
-				     struct ceph_pagelist_cursor *c);
-
-extern int ceph_pagelist_truncate(struct ceph_pagelist *pl,
-				  struct ceph_pagelist_cursor *c);
-
 static inline int ceph_pagelist_encode_64(struct ceph_pagelist *pl, u64 v)
 {
 	__le64 ev = cpu_to_le64(v);

net/ceph/pagelist.c

@@ -131,41 +131,3 @@ int ceph_pagelist_free_reserve(struct ceph_pagelist *pl)
 	return 0;
 }
 EXPORT_SYMBOL(ceph_pagelist_free_reserve);
-
-/* Create a truncation point. */
-void ceph_pagelist_set_cursor(struct ceph_pagelist *pl,
-			      struct ceph_pagelist_cursor *c)
-{
-	c->pl = pl;
-	c->page_lru = pl->head.prev;
-	c->room = pl->room;
-}
-EXPORT_SYMBOL(ceph_pagelist_set_cursor);
-
-/* Truncate a pagelist to the given point. Move extra pages to reserve.
- * This won't sleep.
- * Returns: 0 on success,
- *          -EINVAL if the pagelist doesn't match the trunc point pagelist
- */
-int ceph_pagelist_truncate(struct ceph_pagelist *pl,
-			   struct ceph_pagelist_cursor *c)
-{
-	struct page *page;
-
-	if (pl != c->pl)
-		return -EINVAL;
-	ceph_pagelist_unmap_tail(pl);
-	while (pl->head.prev != c->page_lru) {
-		page = list_entry(pl->head.prev, struct page, lru);
-		/* move from pagelist to reserve */
-		list_move_tail(&page->lru, &pl->free_list);
-		++pl->num_pages_free;
-	}
-	pl->room = c->room;
-	if (!list_empty(&pl->head)) {
-		page = list_entry(pl->head.prev, struct page, lru);
-		pl->mapped_tail = kmap(page);
-	}
-	return 0;
-}
-EXPORT_SYMBOL(ceph_pagelist_truncate);