On Fri, Aug 07, 2015 at 09:57:14PM +0800, kbuild test robot wrote: > tree: git://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master > head: e6455bc5b91f41f842f30465c9193320f0568707 > commit: cbba4e22584984bffccd07e0801fd2b8ec1ecf5f [6277/6751] Move /proc/kpageidle to /sys/kernel/mm/page_idle/bitmap > config: sh-allmodconfig (attached as .config) > reproduce: > wget https://git.kernel.org/cgit/linux/kernel/git/wfg/lkp-tests.git/plain/sbin/make.cross -O ~/bin/make.cross > chmod +x ~/bin/make.cross > git checkout cbba4e22584984bffccd07e0801fd2b8ec1ecf5f > # save the attached .config to linux build tree > make.cross ARCH=sh > > All error/warnings (new ones prefixed by >>): > > mm/page_idle.c: In function 'page_idle_clear_pte_refs_one': > >> mm/page_idle.c:67:4: error: implicit declaration of function 'pmdp_test_and_clear_young' [-Werror=implicit-function-declaration] > >> mm/page_idle.c:71:3: error: implicit declaration of function 'page_check_address' [-Werror=implicit-function-declaration] > >> mm/page_idle.c:71:7: warning: assignment makes pointer from integer without a cast [enabled by default] > >> mm/page_idle.c:73:4: error: implicit declaration of function 'ptep_test_and_clear_young' [-Werror=implicit-function-declaration] > mm/page_idle.c: In function 'page_idle_clear_pte_refs': > >> mm/page_idle.c:95:22: error: variable 'rwc' has initializer but incomplete type > >> mm/page_idle.c:96:3: error: unknown field 'rmap_one' specified in initializer > >> mm/page_idle.c:96:3: warning: excess elements in struct initializer [enabled by default] > >> mm/page_idle.c:96:3: warning: (near initialization for 'rwc') [enabled by default] > >> mm/page_idle.c:97:3: error: unknown field 'anon_lock' specified in initializer > >> mm/page_idle.c:97:16: error: 'page_lock_anon_vma_read' undeclared (first use in this function) > mm/page_idle.c:97:16: note: each undeclared identifier is reported only once for each function it appears in > mm/page_idle.c:97:3: warning: excess elements in struct initializer [enabled by default] > mm/page_idle.c:97:3: warning: (near initialization for 'rwc') [enabled by default] > >> mm/page_idle.c:95:40: error: storage size of 'rwc' isn't known > >> mm/page_idle.c:109:2: error: implicit declaration of function 'rmap_walk' [-Werror=implicit-function-declaration] > >> mm/page_idle.c:95:40: warning: unused variable 'rwc' [-Wunused-variable] > cc1: some warnings being treated as errors IDLE_PAGE_TRACKING must depend on MMU. I accidentally lost this dependency while moving /proc/kpageidle to sysfs, sorry about that. The fix is below. --- diff --git a/mm/Kconfig b/mm/Kconfig index fe133a98a9ef..5f817f35ecc6 100644 --- a/mm/Kconfig +++ b/mm/Kconfig @@ -651,7 +651,7 @@ config DEFERRED_STRUCT_PAGE_INIT config IDLE_PAGE_TRACKING bool "Enable idle page tracking" - depends on SYSFS + depends on MMU && SYSFS select PAGE_EXTENSION if !64BIT help This feature allows to estimate the amount of user pages that have -- 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>