On Fri, 7 Aug 2015 22:24:33 +0800 kbuild test robot <fengguang.wu@xxxxxxxxx> 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: blackfin-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=blackfin > > 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] Yeah. This? From: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> Subject: proc-add-kpageidle-file-fix-6-fix-2-fix kpageidle requires an MMU Cc: Michal Hocko <mhocko@xxxxxxxxxx> Cc: Stephen Rothwell <sfr@xxxxxxxxxxxxxxxx> Cc: Vladimir Davydov <vdavydov@xxxxxxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- mm/Kconfig | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff -puN fs/proc/page.c~proc-add-kpageidle-file-fix-6-fix-2-fix fs/proc/page.c diff -puN mm/Kconfig~proc-add-kpageidle-file-fix-6-fix-2-fix mm/Kconfig --- a/mm/Kconfig~proc-add-kpageidle-file-fix-6-fix-2-fix +++ a/mm/Kconfig @@ -657,7 +657,7 @@ config DEFERRED_STRUCT_PAGE_INIT config IDLE_PAGE_TRACKING bool "Enable idle page tracking" - depends on SYSFS + depends on SYSFS && MMU 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>