On Fri, Jul 26, 2013 at 02:13:40PM -0700, Cody P Schafer wrote: > Because deletion (of the entire tree) is a relatively common use of the > rbtree_postorder iteration, and because doing it safely means fiddling > with temporary storage, provide a helper to simplify postorder rbtree > iteration. > > Signed-off-by: Cody P Schafer <cody@xxxxxxxxxxxxxxxxxx> > --- > include/linux/rbtree.h | 17 +++++++++++++++++ > 1 file changed, 17 insertions(+) > > diff --git a/include/linux/rbtree.h b/include/linux/rbtree.h > index 2879e96..64ab98b 100644 > --- a/include/linux/rbtree.h > +++ b/include/linux/rbtree.h > @@ -85,4 +85,21 @@ static inline void rb_link_node(struct rb_node * node, struct rb_node * parent, > *rb_link = node; > } > > +/** > + * rbtree_postorder_for_each_entry_safe - iterate over rb_root in post order of > + * given type safe against removal of rb_node entry > + * > + * @pos: the 'type *' to use as a loop cursor. > + * @n: another 'type *' to use as temporary storage > + * @root: 'rb_root *' of the rbtree. > + * @field: the name of the rb_node field within 'type'. > + */ > +#define rbtree_postorder_for_each_entry_safe(pos, n, root, field) \ > + for (pos = rb_entry(rb_first_postorder(root), typeof(*pos), field),\ > + n = rb_entry(rb_next_postorder(&pos->field), \ > + typeof(*pos), field); \ > + &pos->field; \ > + pos = n, \ > + n = rb_entry(rb_next_postorder(&pos->field), typeof(*pos), field)) One too many spaces. Also mix of tabs and spaces is weird, but checkpatch doesn't complain so... Seth > + > #endif /* _LINUX_RBTREE_H */ > -- > 1.8.3.4 > -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>
