[kbuild-all] [ammarfaizi2-block:google/android/kernel/common/android11-kiwi-5.4 2314/9999] mm/page_alloc.c:2741:29: sparse: sparse: Using plain integer as NULL pointer

tree: https://github.com/ammarfaizi2/linux-block google/android/kernel/common/android11-kiwi-5.4 head: 7d1d5848183bd1d9086d0572f9af431d3ded407f commit: b9d3d8f1e991052edb89b0537b8f2e8b2aa941ac [2314/9999] ANDROID: GKI: cma: redirect page allocation to CMA config: x86_64-randconfig-s022 (https://download.01.org/0day-ci/archive/20220125/202201250617.FDCLmCS1-lk...) compiler: gcc-9 (Debian 9.3.0-22) 9.3.0 reproduce: # apt-get install sparse # sparse version: v0.6.4-dirty # https://github.com/ammarfaizi2/linux-block/commit/b9d3d8f1e991052edb89b05... git remote add ammarfaizi2-block https://github.com/ammarfaizi2/linux-block git fetch --no-tags ammarfaizi2-block google/android/kernel/common/android11-kiwi-5.4 git checkout b9d3d8f1e991052edb89b0537b8f2e8b2aa941ac # save the config file to linux build tree mkdir build_dir make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=x86_64 SHELL=/bin/bash If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; sparse warnings: (new ones prefixed by >>) mm/page_alloc.c:106:1: sparse: sparse: symbol 'pcpu_drain_mutex' was not declared. Should it be static? mm/page_alloc.c:3252:51: sparse: sparse: incorrect type in argument 7 (different base types) @@ expected int cma @@ got restricted gfp_t @@ mm/page_alloc.c:3252:51: sparse: expected int cma mm/page_alloc.c:3252:51: sparse: got restricted gfp_t mm/page_alloc.c: note: in included file (through include/linux/mm.h): include/linux/gfp.h:325:27: sparse: sparse: restricted gfp_t degrades to integer include/linux/gfp.h:325:27: sparse: sparse: restricted gfp_t degrades to integer vim +2741 mm/page_alloc.c 2736 2737 static struct page *__rmqueue_cma(struct zone *zone, unsigned int order, 2738 int migratetype, 2739 unsigned int alloc_flags) 2740 { 2742 2743 retry: 2744 #ifdef CONFIG_CMA 2745 if (migratetype == MIGRATE_MOVABLE && !zone->cma_alloc) 2746 page = __rmqueue_cma_fallback(zone, order); 2747 else 2748 #endif 2749 page = __rmqueue_smallest(zone, order, migratetype); 2750 2751 if (unlikely(!page) && __rmqueue_fallback(zone, order, migratetype, 2752 alloc_flags)) 2753 goto retry; 2754 2755 trace_mm_page_alloc_zone_locked(page, order, migratetype); 2756 return page; 2757 } 2758 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org