linux-kernel - [hnaz-mm:master 347/435] include/linux/generic-radix-tree.h:190:18: error: implicit declaration of function 'round

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Date:   Sun, 7 Nov 2021 00:40:26 +0800
From:   kernel test robot <lkp@...el.com>
To:     Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Cc:     kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org,
        Johannes Weiner <hannes@...xchg.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Linux Memory Management List <linux-mm@...ck.org>
Subject: [hnaz-mm:master 347/435] include/linux/generic-radix-tree.h:190:18:
 error: implicit declaration of function 'round_up'

tree:   https://github.com/hnaz/linux-mm master
head:   b8280145cf2a894c873fdf91fb2af474c52ac6cc
commit: 60a1efc701a99db4ec497669986977d30eda503d [347/435] include/linux/generic-radix-tree.h: replace kernel.h with the necessary inclusions
config: x86_64-randconfig-a002-20211104 (attached as .config)
compiler: gcc-9 (Debian 9.3.0-22) 9.3.0
reproduce (this is a W=1 build):
        # https://github.com/hnaz/linux-mm/commit/60a1efc701a99db4ec497669986977d30eda503d
        git remote add hnaz-mm https://github.com/hnaz/linux-mm
        git fetch --no-tags hnaz-mm master
        git checkout 60a1efc701a99db4ec497669986977d30eda503d
        # save the attached .config to linux build tree
        make W=1 ARCH=x86_64 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@...el.com>

Note: the hnaz-mm/master HEAD b8280145cf2a894c873fdf91fb2af474c52ac6cc builds fine.
      It only hurts bisectability.

All errors (new ones prefixed by >>):

   In file included from lib/generic-radix-tree.c:3:
   include/linux/generic-radix-tree.h: In function '__genradix_iter_advance':
>> include/linux/generic-radix-tree.h:190:18: error: implicit declaration of function 'round_up' [-Werror=implicit-function-declaration]
     190 |   iter->offset = round_up(iter->offset, PAGE_SIZE);
         |                  ^~~~~~~~
   cc1: some warnings being treated as errors


vim +/round_up +190 include/linux/generic-radix-tree.h

ba20ba2e3743ba Kent Overstreet 2019-03-11  169  
ba20ba2e3743ba Kent Overstreet 2019-03-11  170  /**
ba20ba2e3743ba Kent Overstreet 2019-03-11  171   * genradix_iter_peek - get first entry at or above iterator's current
ba20ba2e3743ba Kent Overstreet 2019-03-11  172   *			position
ba20ba2e3743ba Kent Overstreet 2019-03-11  173   * @_iter:	a genradix_iter
ba20ba2e3743ba Kent Overstreet 2019-03-11  174   * @_radix:	genradix being iterated over
ba20ba2e3743ba Kent Overstreet 2019-03-11  175   *
ba20ba2e3743ba Kent Overstreet 2019-03-11  176   * If no more entries exist at or above @_iter's current position, returns NULL
ba20ba2e3743ba Kent Overstreet 2019-03-11  177   */
ba20ba2e3743ba Kent Overstreet 2019-03-11  178  #define genradix_iter_peek(_iter, _radix)			\
ba20ba2e3743ba Kent Overstreet 2019-03-11  179  	(__genradix_cast(_radix)				\
ba20ba2e3743ba Kent Overstreet 2019-03-11  180  	 __genradix_iter_peek(_iter, &(_radix)->tree,		\
ba20ba2e3743ba Kent Overstreet 2019-03-11  181  			      PAGE_SIZE / __genradix_obj_size(_radix)))
ba20ba2e3743ba Kent Overstreet 2019-03-11  182  
ba20ba2e3743ba Kent Overstreet 2019-03-11  183  static inline void __genradix_iter_advance(struct genradix_iter *iter,
ba20ba2e3743ba Kent Overstreet 2019-03-11  184  					   size_t obj_size)
ba20ba2e3743ba Kent Overstreet 2019-03-11  185  {
ba20ba2e3743ba Kent Overstreet 2019-03-11  186  	iter->offset += obj_size;
ba20ba2e3743ba Kent Overstreet 2019-03-11  187  
ba20ba2e3743ba Kent Overstreet 2019-03-11  188  	if (!is_power_of_2(obj_size) &&
ba20ba2e3743ba Kent Overstreet 2019-03-11  189  	    (iter->offset & (PAGE_SIZE - 1)) + obj_size > PAGE_SIZE)
ba20ba2e3743ba Kent Overstreet 2019-03-11 @190  		iter->offset = round_up(iter->offset, PAGE_SIZE);
ba20ba2e3743ba Kent Overstreet 2019-03-11  191  
ba20ba2e3743ba Kent Overstreet 2019-03-11  192  	iter->pos++;
ba20ba2e3743ba Kent Overstreet 2019-03-11  193  }
ba20ba2e3743ba Kent Overstreet 2019-03-11  194  

:::::: The code at line 190 was first introduced by commit
:::::: ba20ba2e3743bac786dff777954c11930256075e generic radix trees

:::::: TO: Kent Overstreet <kent.overstreet@...il.com>
:::::: CC: Linus Torvalds <torvalds@...ux-foundation.org>

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org

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