Warnings before patch:
files: ['include/linux/rbtree.h', 'lib/rbtree.c']
Warning: include/linux/rbtree.h:166 No description found for return value of 'rb_add_cached'
Warning: include/linux/rbtree.h:224 No description found for return value of 'rb_find_add_cached'
Warning: include/linux/rbtree.h:261 No description found for return value of 'rb_find_add'
Warning: include/linux/rbtree.h:297 No description found for return value of 'rb_find_add_rcu'
Warning: include/linux/rbtree.h:330 No description found for return value of 'rb_find'
Warning: include/linux/rbtree.h:361 No description found for return value of 'rb_find_rcu'
Warning: include/linux/rbtree.h:389 No description found for return value of 'rb_find_first'
Warning: include/linux/rbtree.h:419 function parameter 'node' not described in 'rb_next_match'
Warning: include/linux/rbtree.h:419 No description found for return value of 'rb_next_match'

Current warnings:
files: ['include/linux/rbtree.h', 'lib/rbtree.c']
Warning: include/linux/rbtree.h:180 No description found for return value of 'rb_add_cached'
Warning: include/linux/rbtree.h:238 No description found for return value of 'rb_find_add_cached'
Warning: include/linux/rbtree.h:275 No description found for return value of 'rb_find_add'
Warning: include/linux/rbtree.h:311 No description found for return value of 'rb_find_add_rcu'
Warning: include/linux/rbtree.h:344 No description found for return value of 'rb_find'
Warning: include/linux/rbtree.h:375 No description found for return value of 'rb_find_rcu'
Warning: include/linux/rbtree.h:403 No description found for return value of 'rb_find_first'
Warning: include/linux/rbtree.h:433 function parameter 'node' not described in 'rb_next_match'
Warning: include/linux/rbtree.h:433 No description found for return value of 'rb_next_match'

Warnings before: 9 after: 9