linux-kernel - [ammarfaizi2-block:google/android/kernel/common/android13-5.15 5191/5193] mm/compaction.c:761:15: error: redefinition of 'isolate_and_split_free

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Date:   Fri, 18 Mar 2022 15:09:53 +0800
From:   kernel test robot <lkp@...el.com>
To:     Charan Teja Reddy <quic_charante@...cinc.com>
Cc:     kbuild-all@...ts.01.org,
        GNU/Weeb Mailing List <gwml@...r.gnuweeb.org>,
        linux-kernel@...r.kernel.org,
        Suren Baghdasaryan <surenb@...gle.com>
Subject: [ammarfaizi2-block:google/android/kernel/common/android13-5.15
 5191/5193] mm/compaction.c:761:15: error: redefinition of
 'isolate_and_split_free_page'

tree:   https://github.com/ammarfaizi2/linux-block google/android/kernel/common/android13-5.15
head:   f82f0ceba5827c9d5a3c9326c95f591ebf254003
commit: f47b852faa4afaae0e534b616f2864bb587286e4 [5191/5193] ANDROID: implement wrapper for reverse migration
config: arm64-buildonly-randconfig-r005-20220318 (https://download.01.org/0day-ci/archive/20220318/202203181524.vEJlM4Ub-lkp@intel.com/config)
compiler: aarch64-linux-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/ammarfaizi2/linux-block/commit/f47b852faa4afaae0e534b616f2864bb587286e4
        git remote add ammarfaizi2-block https://github.com/ammarfaizi2/linux-block
        git fetch --no-tags ammarfaizi2-block google/android/kernel/common/android13-5.15
        git checkout f47b852faa4afaae0e534b616f2864bb587286e4
        # save the config file to linux build tree
        mkdir build_dir
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross O=build_dir ARCH=arm64 SHELL=/bin/bash

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/compaction.c:761:15: error: redefinition of 'isolate_and_split_free_page'
     761 | unsigned long isolate_and_split_free_page(struct page *page,
         |               ^~~~~~~~~~~~~~~~~~~~~~~~~~~
   In file included from mm/compaction.c:14:
   include/linux/compaction.h:230:22: note: previous definition of 'isolate_and_split_free_page' with type 'long unsigned int(struct page *, struct list_head *)'
     230 | static unsigned long isolate_and_split_free_page(struct page *page,
         |                      ^~~~~~~~~~~~~~~~~~~~~~~~~~~
   mm/compaction.c:56:27: warning: 'HPAGE_FRAG_CHECK_INTERVAL_MSEC' defined but not used [-Wunused-const-variable=]
      56 | static const unsigned int HPAGE_FRAG_CHECK_INTERVAL_MSEC = 500;
         |                           ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   In file included from mm/compaction.c:14:
   include/linux/compaction.h:230:22: warning: 'isolate_and_split_free_page' defined but not used [-Wunused-function]
     230 | static unsigned long isolate_and_split_free_page(struct page *page,
         |                      ^~~~~~~~~~~~~~~~~~~~~~~~~~~


vim +/isolate_and_split_free_page +761 mm/compaction.c

   760	
 > 761	unsigned long isolate_and_split_free_page(struct page *page,
   762							struct list_head *list)
   763	{
   764		unsigned long isolated;
   765		unsigned int order;
   766	
   767		if (!PageBuddy(page))
   768			return 0;
   769	
   770		order = buddy_order(page);
   771		isolated = __isolate_free_page(page, order);
   772		if (!isolated)
   773			return 0;
   774	
   775		set_page_private(page, order);
   776		list_add(&page->lru, list);
   777	
   778		split_map_pages(list);
   779	
   780		return isolated;
   781	}
   782	EXPORT_SYMBOL_GPL(isolate_and_split_free_page);
   783	

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