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Subject[jsarha:topic/cros-sof-v4.19 290/6555] kernel/sched/tune.c:81:36: error: field 'css' has incomplete type
Hi Patrick,

FYI, the error/warning still remains.

tree: https://github.com/jsarha/linux topic/cros-sof-v4.19
head: d7a3e91d8d16d1ef8653deec5a1fffc4de034a0c
commit: b0d19c6f6707e0ddcd6bd5a243f67301582eea00 [290/6555] ANDROID: sched: fair/tune: Add schedtune with cgroups interface
config: parisc-randconfig-r009-20220606 (https://download.01.org/0day-ci/archive/20220606/202206061737.NRzsiDJC-lkp@intel.com/config)
compiler: hppa-linux-gcc (GCC) 11.3.0
reproduce (this is a W=1 build):
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# https://github.com/jsarha/linux/commit/b0d19c6f6707e0ddcd6bd5a243f67301582eea00
git remote add jsarha https://github.com/jsarha/linux
git fetch --no-tags jsarha topic/cros-sof-v4.19
git checkout b0d19c6f6707e0ddcd6bd5a243f67301582eea00
# save the config file
mkdir build_dir && cp config build_dir/.config
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.3.0 make.cross W=1 O=build_dir ARCH=parisc SHELL=/bin/bash kernel/sched/

If you fix the issue, kindly add following tag where applicable
Reported-by: kernel test robot <lkp@intel.com>

All error/warnings (new ones prefixed by >>):

>> kernel/sched/tune.c:81:36: error: field 'css' has incomplete type
81 | struct cgroup_subsys_state css;
| ^~~
kernel/sched/tune.c: In function 'task_schedtune':
>> kernel/sched/tune.c:101:23: error: implicit declaration of function 'task_css'; did you mean 'task_cpu'? [-Werror=implicit-function-declaration]
101 | return css_st(task_css(tsk, schedtune_cgrp_id));
| ^~~~~~~~
| task_cpu
>> kernel/sched/tune.c:101:37: error: 'schedtune_cgrp_id' undeclared (first use in this function); did you mean 'schedtune_spc_rdiv'?
101 | return css_st(task_css(tsk, schedtune_cgrp_id));
| ^~~~~~~~~~~~~~~~~
| schedtune_spc_rdiv
kernel/sched/tune.c:101:37: note: each undeclared identifier is reported only once for each function it appears in
kernel/sched/tune.c: At top level:
>> kernel/sched/tune.c:290:33: warning: 'struct cgroup_taskset' declared inside parameter list will not be visible outside of this definition or declaration
290 | int schedtune_can_attach(struct cgroup_taskset *tset)
| ^~~~~~~~~~~~~~
kernel/sched/tune.c:290:5: warning: no previous prototype for 'schedtune_can_attach' [-Wmissing-prototypes]
290 | int schedtune_can_attach(struct cgroup_taskset *tset)
| ^~~~~~~~~~~~~~~~~~~~
kernel/sched/tune.c: In function 'schedtune_can_attach':
>> kernel/sched/tune.c:306:9: error: implicit declaration of function 'cgroup_taskset_for_each' [-Werror=implicit-function-declaration]
306 | cgroup_taskset_for_each(task, css, tset) {
| ^~~~~~~~~~~~~~~~~~~~~~~
>> kernel/sched/tune.c:306:49: error: expected ';' before '{' token
306 | cgroup_taskset_for_each(task, css, tset) {
| ^~
| ;
kernel/sched/tune.c:300:13: warning: unused variable 'tasks' [-Wunused-variable]
300 | int tasks;
| ^~~~~
kernel/sched/tune.c:299:13: warning: unused variable 'dst_bg' [-Wunused-variable]
299 | int dst_bg; /* Destination boost group index */
| ^~~~~~
kernel/sched/tune.c:298:13: warning: unused variable 'src_bg' [-Wunused-variable]
298 | int src_bg; /* Source boost group index */
| ^~~~~~
kernel/sched/tune.c:297:20: warning: unused variable 'rq' [-Wunused-variable]
297 | struct rq *rq;
| ^~
kernel/sched/tune.c:296:22: warning: unused variable 'cpu' [-Wunused-variable]
296 | unsigned int cpu;
| ^~~
kernel/sched/tune.c:295:25: warning: unused variable 'rq_flags' [-Wunused-variable]
295 | struct rq_flags rq_flags;
| ^~~~~~~~
kernel/sched/tune.c:294:30: warning: unused variable 'bg' [-Wunused-variable]
294 | struct boost_groups *bg;
| ^~
kernel/sched/tune.c: At top level:
kernel/sched/tune.c:363:37: warning: 'struct cgroup_taskset' declared inside parameter list will not be visible outside of this definition or declaration
363 | void schedtune_cancel_attach(struct cgroup_taskset *tset)
| ^~~~~~~~~~~~~~
kernel/sched/tune.c:363:6: warning: no previous prototype for 'schedtune_cancel_attach' [-Wmissing-prototypes]
363 | void schedtune_cancel_attach(struct cgroup_taskset *tset)
| ^~~~~~~~~~~~~~~~~~~~~~~
>> kernel/sched/tune.c:444:58: warning: 'struct cftype' declared inside parameter list will not be visible outside of this definition or declaration
444 | prefer_idle_read(struct cgroup_subsys_state *css, struct cftype *cft)
| ^~~~~~
kernel/sched/tune.c:452:59: warning: 'struct cftype' declared inside parameter list will not be visible outside of this definition or declaration
452 | prefer_idle_write(struct cgroup_subsys_state *css, struct cftype *cft,
| ^~~~~~
kernel/sched/tune.c:462:52: warning: 'struct cftype' declared inside parameter list will not be visible outside of this definition or declaration
462 | boost_read(struct cgroup_subsys_state *css, struct cftype *cft)
| ^~~~~~
kernel/sched/tune.c:470:53: warning: 'struct cftype' declared inside parameter list will not be visible outside of this definition or declaration
470 | boost_write(struct cgroup_subsys_state *css, struct cftype *cft,
| ^~~~~~
>> kernel/sched/tune.c:486:22: error: array type has incomplete element type 'struct cftype'
486 | static struct cftype files[] = {
| ^~~~~
>> kernel/sched/tune.c:583:8: error: variable 'schedtune_cgrp_subsys' has initializer but incomplete type
583 | struct cgroup_subsys schedtune_cgrp_subsys = {
| ^~~~~~~~~~~~~
>> kernel/sched/tune.c:584:10: error: 'struct cgroup_subsys' has no member named 'css_alloc'
584 | .css_alloc = schedtune_css_alloc,
| ^~~~~~~~~
>> kernel/sched/tune.c:584:27: warning: excess elements in struct initializer
584 | .css_alloc = schedtune_css_alloc,
| ^~~~~~~~~~~~~~~~~~~
kernel/sched/tune.c:584:27: note: (near initialization for 'schedtune_cgrp_subsys')
>> kernel/sched/tune.c:585:10: error: 'struct cgroup_subsys' has no member named 'css_free'
585 | .css_free = schedtune_css_free,
| ^~~~~~~~
kernel/sched/tune.c:585:27: warning: excess elements in struct initializer
585 | .css_free = schedtune_css_free,
| ^~~~~~~~~~~~~~~~~~
kernel/sched/tune.c:585:27: note: (near initialization for 'schedtune_cgrp_subsys')
>> kernel/sched/tune.c:586:10: error: 'struct cgroup_subsys' has no member named 'can_attach'
586 | .can_attach = schedtune_can_attach,
| ^~~~~~~~~~
kernel/sched/tune.c:586:27: warning: excess elements in struct initializer
586 | .can_attach = schedtune_can_attach,
| ^~~~~~~~~~~~~~~~~~~~
kernel/sched/tune.c:586:27: note: (near initialization for 'schedtune_cgrp_subsys')
>> kernel/sched/tune.c:587:10: error: 'struct cgroup_subsys' has no member named 'cancel_attach'
587 | .cancel_attach = schedtune_cancel_attach,
| ^~~~~~~~~~~~~
kernel/sched/tune.c:587:27: warning: excess elements in struct initializer
587 | .cancel_attach = schedtune_cancel_attach,
| ^~~~~~~~~~~~~~~~~~~~~~~
kernel/sched/tune.c:587:27: note: (near initialization for 'schedtune_cgrp_subsys')
>> kernel/sched/tune.c:588:10: error: 'struct cgroup_subsys' has no member named 'legacy_cftypes'
588 | .legacy_cftypes = files,
| ^~~~~~~~~~~~~~
kernel/sched/tune.c:588:27: warning: excess elements in struct initializer
588 | .legacy_cftypes = files,
| ^~~~~
kernel/sched/tune.c:588:27: note: (near initialization for 'schedtune_cgrp_subsys')
>> kernel/sched/tune.c:589:10: error: 'struct cgroup_subsys' has no member named 'early_init'
589 | .early_init = 1,
| ^~~~~~~~~~
kernel/sched/tune.c:589:27: warning: excess elements in struct initializer
589 | .early_init = 1,
| ^
kernel/sched/tune.c:589:27: note: (near initialization for 'schedtune_cgrp_subsys')
>> kernel/sched/tune.c:583:22: error: storage size of 'schedtune_cgrp_subsys' isn't known
583 | struct cgroup_subsys schedtune_cgrp_subsys = {
| ^~~~~~~~~~~~~~~~~~~~~
kernel/sched/tune.c: In function 'task_schedtune':
kernel/sched/tune.c:102:1: warning: control reaches end of non-void function [-Wreturn-type]
102 | }
| ^
kernel/sched/tune.c: In function 'schedtune_can_attach':
kernel/sched/tune.c:361:1: warning: control reaches end of non-void function [-Wreturn-type]
361 | }
| ^
At top level:
kernel/sched/tune.c:486:22: warning: 'files' defined but not used [-Wunused-variable]
486 | static struct cftype files[] = {
| ^~~~~
cc1: some warnings being treated as errors


vim +/css +81 kernel/sched/tune.c

15
16 /*
17 * EAS scheduler tunables for task groups.
18 *
19 * When CGroup support is enabled, we have to synchronize two different
20 * paths:
21 * - slow path: where CGroups are created/updated/removed
22 * - fast path: where tasks in a CGroups are accounted
23 *
24 * The slow path tracks (a limited number of) CGroups and maps each on a
25 * "boost_group" index. The fastpath accounts tasks currently RUNNABLE on each
26 * "boost_group".
27 *
28 * Once a new CGroup is created, a boost group idx is assigned and the
29 * corresponding "boost_group" marked as valid on each CPU.
30 * Once a CGroup is release, the corresponding "boost_group" is marked as
31 * invalid on each CPU. The CPU boost value (boost_max) is aggregated by
32 * considering only valid boost_groups with a non null tasks counter.
33 *
34 * .:: Locking strategy
35 *
36 * The fast path uses a spin lock for each CPU boost_group which protects the
37 * tasks counter.
38 *
39 * The "valid" and "boost" values of each CPU boost_group is instead
40 * protected by the RCU lock provided by the CGroups callbacks. Thus, only the
41 * slow path can access and modify the boost_group attribtues of each CPU.
42 * The fast path will catch up the most updated values at the next scheduling
43 * event (i.e. enqueue/dequeue).
44 *
45 * |
46 * SLOW PATH | FAST PATH
47 * CGroup add/update/remove | Scheduler enqueue/dequeue events
48 * |
49 * |
50 * | DEFINE_PER_CPU(struct boost_groups)
51 * | +--------------+----+---+----+----+
52 * | | idle | | | | |
53 * | | boost_max | | | | |
54 * | +---->lock | | | | |
55 * struct schedtune allocated_groups | | | group[ ] | | | | |
56 * +------------------------------+ +-------+ | | +--+---------+-+----+---+----+----+
57 * | idx | | | | | | valid |
58 * | boots / prefer_idle | | | | | | boost |
59 * | perf_{boost/constraints}_idx | <---------+(*) | | | | tasks | <------------+
60 * | css | +-------+ | | +---------+ |
61 * +-+----------------------------+ | | | | | | |
62 * ^ | | | | | | |
63 * | +-------+ | | +---------+ |
64 * | | | | | | | |
65 * | | | | | | | |
66 * | +-------+ | | +---------+ |
67 * | zmalloc | | | | | | |
68 * | | | | | | | |
69 * | +-------+ | | +---------+ |
70 * + BOOSTGROUPS_COUNT | | BOOSTGROUPS_COUNT |
71 * schedtune_boostgroup_init() | + |
72 * | schedtune_{en,de}queue_task() |
73 * | +
74 * | schedtune_tasks_update()
75 * |
76 */
77
78 /* SchdTune tunables for a group of tasks */
79 struct schedtune {
80 /* SchedTune CGroup subsystem */
> 81 struct cgroup_subsys_state css;
82
83 /* Boost group allocated ID */
84 int idx;
85
86 /* Boost value for tasks on that SchedTune CGroup */
87 int boost;
88
89 /* Hint to bias scheduling of tasks on that SchedTune CGroup
90 * towards idle CPUs */
91 int prefer_idle;
92 };
93
94 static inline struct schedtune *css_st(struct cgroup_subsys_state *css)
95 {
96 return css ? container_of(css, struct schedtune, css) : NULL;
97 }
98
99 static inline struct schedtune *task_schedtune(struct task_struct *tsk)
100 {
> 101 return css_st(task_css(tsk, schedtune_cgrp_id));
102 }
103

--
0-DAY CI Kernel Test Service
https://01.org/lkp

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