linux-kernel - [hnaz-mm:master 251/366] mm/damon/paddr.c:216:5: error: no previous prototype for 'damon_pa_apply

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Date:   Mon, 25 Oct 2021 00:07:32 +0800
From:   kernel test robot <lkp@...el.com>
To:     SeongJae Park <sj@...nel.org>
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 251/366] mm/damon/paddr.c:216:5: error: no previous
 prototype for 'damon_pa_apply_scheme'

tree:   https://github.com/hnaz/linux-mm master
head:   468edaa91589af9aebd54b32f019bf309cf67e78
commit: ccd554f15bb1cd977d740c1ea8241ecf95108c94 [251/366] mm/damon/paddr: support the pageout scheme
config: arc-allyesconfig (attached as .config)
compiler: arceb-elf-gcc (GCC) 11.2.0
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # https://github.com/hnaz/linux-mm/commit/ccd554f15bb1cd977d740c1ea8241ecf95108c94
        git remote add hnaz-mm https://github.com/hnaz/linux-mm
        git fetch --no-tags hnaz-mm master
        git checkout ccd554f15bb1cd977d740c1ea8241ecf95108c94
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross ARCH=arc 

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

All errors (new ones prefixed by >>):

>> mm/damon/paddr.c:216:5: error: no previous prototype for 'damon_pa_apply_scheme' [-Werror=missing-prototypes]
     216 | int damon_pa_apply_scheme(struct damon_ctx *ctx, struct damon_target *t,
         |     ^~~~~~~~~~~~~~~~~~~~~
   cc1: all warnings being treated as errors


vim +/damon_pa_apply_scheme +216 mm/damon/paddr.c

   215	
 > 216	int damon_pa_apply_scheme(struct damon_ctx *ctx, struct damon_target *t,
   217			struct damon_region *r, struct damos *scheme)
   218	{
   219		unsigned long addr;
   220		LIST_HEAD(page_list);
   221	
   222		if (scheme->action != DAMOS_PAGEOUT)
   223			return -EINVAL;
   224	
   225		for (addr = r->ar.start; addr < r->ar.end; addr += PAGE_SIZE) {
   226			struct page *page = damon_get_page(PHYS_PFN(addr));
   227	
   228			if (!page)
   229				continue;
   230	
   231			ClearPageReferenced(page);
   232			test_and_clear_page_young(page);
   233			if (isolate_lru_page(page)) {
   234				put_page(page);
   235				continue;
   236			}
   237			if (PageUnevictable(page)) {
   238				putback_lru_page(page);
   239			} else {
   240				list_add(&page->lru, &page_list);
   241				put_page(page);
   242			}
   243		}
   244		reclaim_pages(&page_list);
   245		cond_resched();
   246		return 0;
   247	}
   248	

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

Download attachment ".config.gz" of type "application/gzip" (69513 bytes)