I am getting mm/compaction.c: In function 'isolate_freepages_block': mm/compaction.c:469:4: error: implicit declaration of function 'pageblock_skip_persistent' [-Werror=implicit-function-declaration] if (pageblock_skip_persistent(page, order)) { ^ mm/compaction.c:470:5: error: implicit declaration of function 'set_pageblock_skip' [-Werror=implicit-function-declaration] set_pageblock_skip(page); when compaction is disabled because isolate_freepages_block is defined also when CONFIG_COMPACTION=n. I haven't checked how to fix this properly yet. -- Michal Hocko SUSE Labs -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx"> email@xxxxxxxxx </a>