* [zen:6.19/prjc 16/22] kernel/sched/alt_core.c:7352:23: warning: variable 't' used in loop condition not modified in loop body
@ 2026-04-07 4:00 kernel test robot
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From: kernel test robot @ 2026-04-07 4:00 UTC (permalink / raw)
To: steven; +Cc: oe-kbuild-all
tree: https://github.com/zen-kernel/zen-kernel 6.19/prjc
head: 14ff03aebefa493a7d7ecfcbff66ded1147dba3e
commit: 929363bec03b29a52d29a1e3b16e8b631ad47d18 [16/22] sched/alt: [Sync] 81f70f0ee9ea sched/mmcid: Avoid full tasklist walks
config: riscv-allmodconfig (https://download.01.org/0day-ci/archive/20260406/202604060045.IbOkdyeW-lkp@intel.com/config)
compiler: clang version 23.0.0git (https://github.com/llvm/llvm-project c80443cd37b2e2788cba67ffa180a6331e5f0791)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260406/202604060045.IbOkdyeW-lkp@intel.com/reproduce)
If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202604060045.IbOkdyeW-lkp@intel.com/
All warnings (new ones prefixed by >>):
kernel/sched/alt_core.c:490:25: error: use of undeclared identifier 'paravirt_steal_rq_enabled'
490 | if (static_key_false((¶virt_steal_rq_enabled))) {
| ^~~~~~~~~~~~~~~~~~~~~~~~~
kernel/sched/alt_core.c:493:24: error: call to undeclared function 'paravirt_steal_clock'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
493 | steal = prev_steal = paravirt_steal_clock(cpu_of(rq));
| ^
kernel/sched/alt_core.c:7352:38: error: no member named 'user_list' in 'struct mm_mm_cid'
7352 | hlist_for_each_entry(t, &mm->mm_cid.user_list, mm_cid.node) {
| ~~~~~~~~~~ ^
include/linux/list.h:1167:31: note: expanded from macro 'hlist_for_each_entry'
1167 | for (pos = hlist_entry_safe((head)->first, typeof(*(pos)), member);\
| ^~~~
include/linux/list.h:1156:12: note: expanded from macro 'hlist_entry_safe'
1156 | ({ typeof(ptr) ____ptr = (ptr); \
| ^~~
kernel/sched/alt_core.c:7352:38: error: no member named 'user_list' in 'struct mm_mm_cid'
7352 | hlist_for_each_entry(t, &mm->mm_cid.user_list, mm_cid.node) {
| ~~~~~~~~~~ ^
include/linux/list.h:1167:31: note: expanded from macro 'hlist_for_each_entry'
1167 | for (pos = hlist_entry_safe((head)->first, typeof(*(pos)), member);\
| ^~~~
include/linux/list.h:1156:28: note: expanded from macro 'hlist_entry_safe'
1156 | ({ typeof(ptr) ____ptr = (ptr); \
| ^~~
kernel/sched/alt_core.c:7352:2: error: no member named 'node' in 'sched_mm_cid'
7352 | hlist_for_each_entry(t, &mm->mm_cid.user_list, mm_cid.node) {
| ^ ~~~~~
include/linux/list.h:1167:13: note: expanded from macro 'hlist_for_each_entry'
1167 | for (pos = hlist_entry_safe((head)->first, typeof(*(pos)), member);\
| ^ ~~~~~~
include/linux/list.h:1157:15: note: expanded from macro 'hlist_entry_safe'
1157 | ____ptr ? hlist_entry(____ptr, type, member) : NULL; \
| ^ ~~~~~~
include/linux/list.h:1146:40: note: expanded from macro 'hlist_entry'
1146 | #define hlist_entry(ptr, type, member) container_of(ptr,type,member)
| ^ ~~~~~~
include/linux/container_of.h:24:21: note: expanded from macro 'container_of'
24 | ((type *)(__mptr - offsetof(type, member))); })
| ^ ~~~~~~
include/linux/stddef.h:16:32: note: expanded from macro 'offsetof'
16 | #define offsetof(TYPE, MEMBER) __builtin_offsetof(TYPE, MEMBER)
| ^ ~~~~~~
kernel/sched/alt_core.c:7352:56: error: no member named 'node' in 'struct sched_mm_cid'
7352 | hlist_for_each_entry(t, &mm->mm_cid.user_list, mm_cid.node) {
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~
include/linux/list.h:1169:37: note: expanded from macro 'hlist_for_each_entry'
1169 | pos = hlist_entry_safe((pos)->member.next, typeof(*(pos)), member))
| ~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/list.h:1156:12: note: expanded from macro 'hlist_entry_safe'
1156 | ({ typeof(ptr) ____ptr = (ptr); \
| ^~~
kernel/sched/alt_core.c:7352:56: error: no member named 'node' in 'struct sched_mm_cid'
7352 | hlist_for_each_entry(t, &mm->mm_cid.user_list, mm_cid.node) {
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~
include/linux/list.h:1169:37: note: expanded from macro 'hlist_for_each_entry'
1169 | pos = hlist_entry_safe((pos)->member.next, typeof(*(pos)), member))
| ~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/list.h:1156:28: note: expanded from macro 'hlist_entry_safe'
1156 | ({ typeof(ptr) ____ptr = (ptr); \
| ^~~
kernel/sched/alt_core.c:7352:2: error: no member named 'node' in 'sched_mm_cid'
7352 | hlist_for_each_entry(t, &mm->mm_cid.user_list, mm_cid.node) {
| ^ ~~~~~
include/linux/list.h:1169:13: note: expanded from macro 'hlist_for_each_entry'
1169 | pos = hlist_entry_safe((pos)->member.next, typeof(*(pos)), member))
| ^ ~~~~~~
include/linux/list.h:1157:15: note: expanded from macro 'hlist_entry_safe'
1157 | ____ptr ? hlist_entry(____ptr, type, member) : NULL; \
| ^ ~~~~~~
include/linux/list.h:1146:40: note: expanded from macro 'hlist_entry'
1146 | #define hlist_entry(ptr, type, member) container_of(ptr,type,member)
| ^ ~~~~~~
include/linux/container_of.h:24:21: note: expanded from macro 'container_of'
24 | ((type *)(__mptr - offsetof(type, member))); })
| ^ ~~~~~~
include/linux/stddef.h:16:32: note: expanded from macro 'offsetof'
16 | #define offsetof(TYPE, MEMBER) __builtin_offsetof(TYPE, MEMBER)
| ^ ~~~~~~
>> kernel/sched/alt_core.c:7352:23: warning: variable 't' used in loop condition not modified in loop body [-Wfor-loop-analysis]
7352 | hlist_for_each_entry(t, &mm->mm_cid.user_list, mm_cid.node) {
| ^
kernel/sched/alt_core.c:7366:28: error: no member named 'node' in 'struct sched_mm_cid'
7366 | hlist_add_head(&t->mm_cid.node, &mm->mm_cid.user_list);
| ~~~~~~~~~ ^
kernel/sched/alt_core.c:7366:46: error: no member named 'user_list' in 'struct mm_mm_cid'
7366 | hlist_add_head(&t->mm_cid.node, &mm->mm_cid.user_list);
| ~~~~~~~~~~ ^
kernel/sched/alt_core.c:7424:28: error: no member named 'node' in 'struct sched_mm_cid'
7424 | hlist_del_init(&t->mm_cid.node);
| ~~~~~~~~~ ^
kernel/sched/alt_core.c:7567:30: error: no member named 'user_list' in 'struct mm_mm_cid'
7567 | INIT_HLIST_HEAD(&mm->mm_cid.user_list);
| ~~~~~~~~~~ ^
include/linux/list.h:945:32: note: expanded from macro 'INIT_HLIST_HEAD'
945 | #define INIT_HLIST_HEAD(ptr) ((ptr)->first = NULL)
| ^~~
1 warning and 12 errors generated.
vim +/t +7352 kernel/sched/alt_core.c
7344
7345 static void mm_cid_fixup_tasks_to_cpus(void)
7346 {
7347 struct mm_struct *mm = current->mm;
7348 struct task_struct *t;
7349
7350 lockdep_assert_held(&mm->mm_cid.mutex);
7351
> 7352 hlist_for_each_entry(t, &mm->mm_cid.user_list, mm_cid.node) {
7353 /* Current has already transferred before invoking the fixup. */
7354 if (t != current)
7355 mm_cid_fixup_task_to_cpu(t, mm);
7356 }
7357
7358 mm_cid_complete_transit(mm, MM_CID_ONCPU);
7359 }
7360
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
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