tree: https://git.kernel.org/pub/scm/linux/kernel/git/josef/btrfs-next.git blk-iolatency head: 657e770d4d6e3b03c3d4b96e427b30d6f766e2e2 commit: 7f1e4ea0a7071711f43deaed15b123bcf0a3ee8f [8/13] blk-stat: export helpers for modifying blk_rq_stat config: x86_64-randconfig-x011-201820 (attached as .config) compiler: gcc-7 (Debian 7.3.0-16) 7.3.0 reproduce: git checkout 7f1e4ea0a7071711f43deaed15b123bcf0a3ee8f # save the attached .config to linux build tree make ARCH=x86_64 All errors (new ones prefixed by >>): In file included from include/linux/blkdev.h:21:0, from include/linux/backing-dev.h:15, from mm/shmem.c:57: include/linux/bio.h:556:55: warning: 'struct blkcg_gq' declared inside parameter list will not be visible outside of this definition or declaration static int bio_associate_blkg(struct bio *bio, struct blkcg_gq *blkg) { return 0; } ^~~~~~~~ mm/shmem.c: In function 'shmem_unuse': >> mm/shmem.c:1222:10: error: implicit declaration of function 'mem_cgroup_try_charge_delay'; did you mean 'mem_cgroup_try_charge_swap'? [-Werror=implicit-function-declaration] error = mem_cgroup_try_charge_delay(page, current->mm, GFP_KERNEL, ^~~~~~~~~~~~~~~~~~~~~~~~~~~ mem_cgroup_try_charge_swap In file included from include/linux/backing-dev.h:17:0, from mm/shmem.c:57: At top level: include/linux/blk-cgroup.h:832:13: warning: 'blkcg_schedule_throttle' defined but not used [-Wunused-function] static void blkcg_schedule_throttle(struct request_queue *q, bool use_memdelay) { } ^~~~~~~~~~~~~~~~~~~~~~~ include/linux/blk-cgroup.h:831:13: warning: 'blkcg_add_delay' defined but not used [-Wunused-function] static void blkcg_add_delay(struct blkcg_gq *blkg, u64 now, u64 delta) { } ^~~~~~~~~~~~~~~ In file included from include/linux/blkdev.h:21:0, from include/linux/backing-dev.h:15, from mm/shmem.c:57: include/linux/bio.h:556:12: warning: 'bio_associate_blkg' defined but not used [-Wunused-function] static int bio_associate_blkg(struct bio *bio, struct blkcg_gq *blkg) { return 0; } ^~~~~~~~~~~~~~~~~~ cc1: some warnings being treated as errors -- mm/memory.c: In function 'wp_page_copy': >> mm/memory.c:2497:6: error: implicit declaration of function 'mem_cgroup_try_charge_delay'; did you mean 'mem_cgroup_try_charge_swap'? [-Werror=implicit-function-declaration] if (mem_cgroup_try_charge_delay(new_page, mm, GFP_KERNEL, &memcg, false)) ^~~~~~~~~~~~~~~~~~~~~~~~~~~ mem_cgroup_try_charge_swap cc1: some warnings being treated as errors vim +1222 mm/shmem.c ^1da177e Linus Torvalds 2005-04-16 1199 ^1da177e Linus Torvalds 2005-04-16 1200 /* 46f65ec1 Hugh Dickins 2011-08-03 1201 * Search through swapped inodes to find and replace swap by page. ^1da177e Linus Torvalds 2005-04-16 1202 */ 41ffe5d5 Hugh Dickins 2011-08-03 1203 int shmem_unuse(swp_entry_t swap, struct page *page) ^1da177e Linus Torvalds 2005-04-16 1204 { 41ffe5d5 Hugh Dickins 2011-08-03 1205 struct list_head *this, *next; ^1da177e Linus Torvalds 2005-04-16 1206 struct shmem_inode_info *info; 00501b53 Johannes Weiner 2014-08-08 1207 struct mem_cgroup *memcg; bde05d1c Hugh Dickins 2012-05-29 1208 int error = 0; bde05d1c Hugh Dickins 2012-05-29 1209 bde05d1c Hugh Dickins 2012-05-29 1210 /* bde05d1c Hugh Dickins 2012-05-29 1211 * There's a faint possibility that swap page was replaced before 0142ef6c Hugh Dickins 2012-06-07 1212 * caller locked it: caller will come back later with the right page. bde05d1c Hugh Dickins 2012-05-29 1213 */ 0142ef6c Hugh Dickins 2012-06-07 1214 if (unlikely(!PageSwapCache(page) || page_private(page) != swap.val)) bde05d1c Hugh Dickins 2012-05-29 1215 goto out; 778dd893 Hugh Dickins 2011-05-11 1216 778dd893 Hugh Dickins 2011-05-11 1217 /* 778dd893 Hugh Dickins 2011-05-11 1218 * Charge page using GFP_KERNEL while we can wait, before taking 778dd893 Hugh Dickins 2011-05-11 1219 * the shmem_swaplist_mutex which might hold up shmem_writepage(). 778dd893 Hugh Dickins 2011-05-11 1220 * Charged back to the user (not to caller) when swap account is used. 778dd893 Hugh Dickins 2011-05-11 1221 */ 90f955bb Tejun Heo 2018-04-16 @1222 error = mem_cgroup_try_charge_delay(page, current->mm, GFP_KERNEL, 90f955bb Tejun Heo 2018-04-16 1223 &memcg, false); 778dd893 Hugh Dickins 2011-05-11 1224 if (error) 778dd893 Hugh Dickins 2011-05-11 1225 goto out; 46f65ec1 Hugh Dickins 2011-08-03 1226 /* No radix_tree_preload: swap entry keeps a place for page in tree */ 00501b53 Johannes Weiner 2014-08-08 1227 error = -EAGAIN; ^1da177e Linus Torvalds 2005-04-16 1228 cb5f7b9a Hugh Dickins 2008-02-04 1229 mutex_lock(&shmem_swaplist_mutex); 41ffe5d5 Hugh Dickins 2011-08-03 1230 list_for_each_safe(this, next, &shmem_swaplist) { 41ffe5d5 Hugh Dickins 2011-08-03 1231 info = list_entry(this, struct shmem_inode_info, swaplist); 285b2c4f Hugh Dickins 2011-08-03 1232 if (info->swapped) 00501b53 Johannes Weiner 2014-08-08 1233 error = shmem_unuse_inode(info, swap, &page); 6922c0c7 Hugh Dickins 2011-08-03 1234 else 6922c0c7 Hugh Dickins 2011-08-03 1235 list_del_init(&info->swaplist); cb5f7b9a Hugh Dickins 2008-02-04 1236 cond_resched(); 00501b53 Johannes Weiner 2014-08-08 1237 if (error != -EAGAIN) 778dd893 Hugh Dickins 2011-05-11 1238 break; 00501b53 Johannes Weiner 2014-08-08 1239 /* found nothing in this: move on to search the next */ ^1da177e Linus Torvalds 2005-04-16 1240 } cb5f7b9a Hugh Dickins 2008-02-04 1241 mutex_unlock(&shmem_swaplist_mutex); 778dd893 Hugh Dickins 2011-05-11 1242 00501b53 Johannes Weiner 2014-08-08 1243 if (error) { 00501b53 Johannes Weiner 2014-08-08 1244 if (error != -ENOMEM) 00501b53 Johannes Weiner 2014-08-08 1245 error = 0; f627c2f5 Kirill A. Shutemov 2016-01-15 1246 mem_cgroup_cancel_charge(page, memcg, false); 00501b53 Johannes Weiner 2014-08-08 1247 } else f627c2f5 Kirill A. Shutemov 2016-01-15 1248 mem_cgroup_commit_charge(page, memcg, true, false); 778dd893 Hugh Dickins 2011-05-11 1249 out: aaa46865 Hugh Dickins 2009-12-14 1250 unlock_page(page); 09cbfeaf Kirill A. Shutemov 2016-04-01 1251 put_page(page); 778dd893 Hugh Dickins 2011-05-11 1252 return error; ^1da177e Linus Torvalds 2005-04-16 1253 } ^1da177e Linus Torvalds 2005-04-16 1254 :::::: The code at line 1222 was first introduced by commit :::::: 90f955bbc57765617e3e99f784f3239c3d8f0360 memcontrol: schedule throttling if we are congested :::::: TO: Tejun Heo <tj@xxxxxxxxxx> :::::: CC: Josef Bacik <jbacik@xxxxxx> --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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