On Fri, Jul 26, 2019 at 02:42:44AM +0800, Pengfei Li wrote: > static inline bool > -should_compact_retry(struct alloc_context *ac, int order, int alloc_flags, > - enum compact_result compact_result, > - enum compact_priority *compact_priority, > - int *compaction_retries) > +should_compact_retry(struct alloc_context *ac, unsigned int order, > + int alloc_flags, enum compact_result compact_result, > + enum compact_priority *compact_priority, int *compaction_retries) > { > int max_retries = MAX_COMPACT_RETRIES; One tab here is insufficient indentation. It should be at least two. Some parts of the kernel insist on lining up arguments with the opening parenthesis of the function; I don't know if mm really obeys this rule, but you're indenting function arguments to the same level as the opening variables of the function, which is confusing.