Hi Josef, [auto build test WARNING on linus/master] [also build test WARNING on v4.8-rc1 next-20160809] [cannot apply to linux/master] [if your patch is applied to the wrong git tree, please drop us a note to help improve the system] url: https://github.com/0day-ci/linux/commits/Josef-Bacik/Provide-accounting-for-dirty-metadata/20160810-031219 config: x86_64-randconfig-x019-201632 (attached as .config) compiler: gcc-6 (Debian 6.1.1-9) 6.1.1 20160705 reproduce: # save the attached .config to linux build tree make ARCH=x86_64 All warnings (new ones prefixed by >>): In file included from include/linux/linkage.h:4:0, from include/linux/kernel.h:6, from mm/page-writeback.c:14: mm/page-writeback.c: In function 'balance_dirty_pages_ratelimited': mm/page-writeback.c:1873:6: error: implicit declaration of function 'bdi_cgwb_enabled' [-Werror=implicit-function-declaration] if (bdi_cgwb_enabled(bdi, sb)) ^ include/linux/compiler.h:149:30: note: in definition of macro '__trace_if' if (__builtin_constant_p(!!(cond)) ? !!(cond) : \ ^~~~ >> mm/page-writeback.c:1873:2: note: in expansion of macro 'if' if (bdi_cgwb_enabled(bdi, sb)) ^~ cc1: some warnings being treated as errors vim +/if +1873 mm/page-writeback.c 1857 * 1858 * On really big machines, get_writeback_state is expensive, so try to avoid 1859 * calling it too often (ratelimiting). But once we're over the dirty memory 1860 * limit we decrease the ratelimiting by a lot, to prevent individual processes 1861 * from overshooting the limit by (ratelimit_pages) each. 1862 */ 1863 void balance_dirty_pages_ratelimited(struct backing_dev_info *bdi, 1864 struct super_block *sb) 1865 { 1866 struct bdi_writeback *wb = NULL; 1867 int ratelimit; 1868 int *p; 1869 1870 if (!bdi_cap_account_dirty(bdi)) 1871 return; 1872 > 1873 if (bdi_cgwb_enabled(bdi, sb)) 1874 wb = wb_get_create_current(bdi, GFP_KERNEL); 1875 if (!wb) 1876 wb = &bdi->wb; 1877 1878 ratelimit = current->nr_dirtied_pause; 1879 if (wb->dirty_exceeded) 1880 ratelimit = min(ratelimit, 32 >> (PAGE_SHIFT - 10)); 1881 --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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