--- a/mm/huge_memory.c~mm-split_huge_pages_fops-should-be-defined-with-define_debugfs_attribute +++ a/mm/huge_memory.c @@ -3003,7 +3003,7 @@ next: return 0; } -DEFINE_SIMPLE_ATTRIBUTE(split_huge_pages_fops, NULL, split_huge_pages_set, +DEFINE_DEBUGFS_ATTRIBUTE(split_huge_pages_fops, NULL, split_huge_pages_set, "%llu\n"); static int __init split_huge_pages_debugfs(void)