Hi Mike, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on mmotm/master] [also build test WARNING on next-20180126] [cannot apply to linus/master v4.15] [if your patch is applied to the wrong git tree, please drop us a note to help improve the system] url: https://github.com/0day-ci/linux/commits/Mike-Kravetz/restructure-memfd-code/20180131-023405 base: git://git.cmpxchg.org/linux-mmotm.git master reproduce: # apt-get install sparse make ARCH=x86_64 allmodconfig make C=1 CF=-D__CHECK_ENDIAN__ sparse warnings: (new ones prefixed by >>) >> mm/memfd.c:40:9: sparse: incorrect type in assignment (different address spaces) @@ expected void @@ got void <avoid @@ mm/memfd.c:40:9: expected void mm/memfd.c:40:9: got void >> mm/memfd.c:40:9: sparse: incorrect type in assignment (different address spaces) @@ expected void @@ got void <avoid @@ mm/memfd.c:40:9: expected void mm/memfd.c:40:9: got void >> mm/memfd.c:41:46: sparse: incorrect type in argument 1 (different address spaces) @@ expected void @@ got @@ mm/memfd.c:41:46: expected void mm/memfd.c:41:46: got void mm/memfd.c:44:38: sparse: incorrect type in assignment (different address spaces) @@ expected void @@ got void <avoid @@ mm/memfd.c:44:38: expected void mm/memfd.c:44:38: got void mm/memfd.c:55:55: sparse: incorrect type in argument 1 (different address spaces) @@ expected void @@ got @@ mm/memfd.c:55:55: expected void mm/memfd.c:55:55: got void mm/memfd.c:55:30: sparse: incorrect type in assignment (different address spaces) @@ expected void @@ got void <avoid @@ mm/memfd.c:55:30: expected void mm/memfd.c:55:30: got void mm/memfd.c:40:9: sparse: incorrect type in argument 1 (different address spaces) @@ expected void @@ got @@ mm/memfd.c:40:9: expected void mm/memfd.c:40:9: got void >> mm/memfd.c:40:9: sparse: incorrect type in assignment (different address spaces) @@ expected void @@ got void <avoid @@ mm/memfd.c:40:9: expected void mm/memfd.c:40:9: got void mm/memfd.c:93:17: sparse: incorrect type in assignment (different address spaces) @@ expected void @@ got void <avoid @@ mm/memfd.c:93:17: expected void mm/memfd.c:93:17: got void mm/memfd.c:93:17: sparse: incorrect type in assignment (different address spaces) @@ expected void @@ got void <avoid @@ mm/memfd.c:93:17: expected void mm/memfd.c:93:17: got void mm/memfd.c:96:54: sparse: incorrect type in argument 1 (different address spaces) @@ expected void @@ got @@ mm/memfd.c:96:54: expected void mm/memfd.c:96:54: got void mm/memfd.c:99:46: sparse: incorrect type in assignment (different address spaces) @@ expected void @@ got void <avoid @@ mm/memfd.c:99:46: expected void mm/memfd.c:99:46: got void mm/memfd.c:125:63: sparse: incorrect type in argument 1 (different address spaces) @@ expected void @@ got @@ mm/memfd.c:125:63: expected void mm/memfd.c:125:63: got void mm/memfd.c:125:38: sparse: incorrect type in assignment (different address spaces) @@ expected void @@ got void <avoid @@ mm/memfd.c:125:38: expected void mm/memfd.c:125:38: got void mm/memfd.c:93:17: sparse: incorrect type in argument 1 (different address spaces) @@ expected void @@ got @@ mm/memfd.c:93:17: expected void mm/memfd.c:93:17: got void mm/memfd.c:93:17: sparse: incorrect type in assignment (different address spaces) @@ expected void @@ got void <avoid @@ mm/memfd.c:93:17: expected void mm/memfd.c:93:17: got void vim +40 mm/memfd.c 6df4ed2a41 Mike Kravetz 2018-01-29 28 6df4ed2a41 Mike Kravetz 2018-01-29 29 static void shmem_tag_pins(struct address_space *mapping) 6df4ed2a41 Mike Kravetz 2018-01-29 30 { 6df4ed2a41 Mike Kravetz 2018-01-29 31 struct radix_tree_iter iter; 6df4ed2a41 Mike Kravetz 2018-01-29 32 void **slot; 6df4ed2a41 Mike Kravetz 2018-01-29 33 pgoff_t start; 6df4ed2a41 Mike Kravetz 2018-01-29 34 struct page *page; 6df4ed2a41 Mike Kravetz 2018-01-29 35 6df4ed2a41 Mike Kravetz 2018-01-29 36 lru_add_drain(); 6df4ed2a41 Mike Kravetz 2018-01-29 37 start = 0; 6df4ed2a41 Mike Kravetz 2018-01-29 38 rcu_read_lock(); 6df4ed2a41 Mike Kravetz 2018-01-29 39 6df4ed2a41 Mike Kravetz 2018-01-29 @40 radix_tree_for_each_slot(slot, &mapping->page_tree, &iter, start) { 6df4ed2a41 Mike Kravetz 2018-01-29 @41 page = radix_tree_deref_slot(slot); 6df4ed2a41 Mike Kravetz 2018-01-29 42 if (!page || radix_tree_exception(page)) { 6df4ed2a41 Mike Kravetz 2018-01-29 43 if (radix_tree_deref_retry(page)) { 6df4ed2a41 Mike Kravetz 2018-01-29 44 slot = radix_tree_iter_retry(&iter); 6df4ed2a41 Mike Kravetz 2018-01-29 45 continue; 6df4ed2a41 Mike Kravetz 2018-01-29 46 } 6df4ed2a41 Mike Kravetz 2018-01-29 47 } else if (page_count(page) - page_mapcount(page) > 1) { 6df4ed2a41 Mike Kravetz 2018-01-29 48 spin_lock_irq(&mapping->tree_lock); 6df4ed2a41 Mike Kravetz 2018-01-29 49 radix_tree_tag_set(&mapping->page_tree, iter.index, 6df4ed2a41 Mike Kravetz 2018-01-29 50 SHMEM_TAG_PINNED); 6df4ed2a41 Mike Kravetz 2018-01-29 51 spin_unlock_irq(&mapping->tree_lock); 6df4ed2a41 Mike Kravetz 2018-01-29 52 } 6df4ed2a41 Mike Kravetz 2018-01-29 53 6df4ed2a41 Mike Kravetz 2018-01-29 54 if (need_resched()) { 6df4ed2a41 Mike Kravetz 2018-01-29 55 slot = radix_tree_iter_resume(slot, &iter); 6df4ed2a41 Mike Kravetz 2018-01-29 56 cond_resched_rcu(); 6df4ed2a41 Mike Kravetz 2018-01-29 57 } 6df4ed2a41 Mike Kravetz 2018-01-29 58 } 6df4ed2a41 Mike Kravetz 2018-01-29 59 rcu_read_unlock(); 6df4ed2a41 Mike Kravetz 2018-01-29 60 } 6df4ed2a41 Mike Kravetz 2018-01-29 61 :::::: The code at line 40 was first introduced by commit :::::: 6df4ed2a410bc04f1ec04dce16ccd236707f7f32 mm: memfd: split out memfd for use by multiple filesystems :::::: TO: Mike Kravetz <mike.kravetz@xxxxxxxxxx> :::::: CC: 0day robot <fengguang.wu@xxxxxxxxx> --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. 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