3:16 p.m.
tree: https://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git
linux-5.10.y-rt
head: 822f2ce254f44f8e65ccb2cdbd7cf4cf2208a3ff
commit: e7dc055a10416e0c6eabd518d6ed89da38eca0f1 [250/279] tracing: Merge irqflags +
preemt counter, add RT bits (update)
config: i386-randconfig-a005-20210216 (attached as .config)
compiler: gcc-9 (Debian 9.3.0-15) 9.3.0
reproduce (this is a W=1 build):
#
https://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git/com...
git remote add linux-rt-devel
https://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git
git fetch --no-tags linux-rt-devel linux-5.10.y-rt
git checkout e7dc055a10416e0c6eabd518d6ed89da38eca0f1
# save the attached .config to linux build tree
make W=1 ARCH=i386
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp(a)intel.com>
Note: the linux-rt-devel/linux-5.10.y-rt HEAD 822f2ce254f44f8e65ccb2cdbd7cf4cf2208a3ff
builds fine.
It only hurts bisectibility.
All errors (new ones prefixed by >>):
kernel/trace/trace_branch.c: In function 'probe_likely_condition':
> kernel/trace/trace_branch.c:62:2: error: 'trace_ctx'
undeclared (first use in this function); did you mean 'trace_reg'?
62
| trace_ctx = _tracing_gen_ctx_flags(flags);
| ^~~~~~~~~
| trace_reg
kernel/trace/trace_branch.c:62:2: note: each undeclared identifier is reported only
once for each function it appears in
kernel/trace/trace_branch.c:40:15: warning: unused variable 'pc'
[-Wunused-variable]
40 | unsigned int pc;
| ^~
kernel/trace/trace_branch.c: At top level:
kernel/trace/trace_branch.c:205:6: warning: no previous prototype for
'ftrace_likely_update' [-Wmissing-prototypes]
205 | void ftrace_likely_update(struct ftrace_likely_data *f, int val,
| ^~~~~~~~~~~~~~~~~~~~
vim +62 kernel/trace/trace_branch.c
29
30 static void
31 probe_likely_condition(struct ftrace_likely_data *f, int val, int expect)
32 {
33 struct trace_event_call *call = &event_branch;
34 struct trace_array *tr = branch_tracer;
35 struct trace_buffer *buffer;
36 struct trace_array_cpu *data;
37 struct ring_buffer_event *event;
38 struct trace_branch *entry;
39 unsigned long flags;
40 unsigned int pc;
41 const char *p;
42
43 if (current->trace_recursion & TRACE_BRANCH_BIT)
44 return;
45
46 /*
47 * I would love to save just the ftrace_likely_data pointer, but
48 * this code can also be used by modules. Ugly things can happen
49 * if the module is unloaded, and then we go and read the
50 * pointer. This is slower, but much safer.
51 */
52
53 if (unlikely(!tr))
54 return;
55
56 raw_local_irq_save(flags);
57 current->trace_recursion |= TRACE_BRANCH_BIT;
58 data = this_cpu_ptr(tr->array_buffer.data);
59 if (atomic_read(&data->disabled))
60 goto out;
61
62 trace_ctx = _tracing_gen_ctx_flags(flags);
63 buffer =
tr->array_buffer.buffer;
64 event = trace_buffer_lock_reserve(buffer, TRACE_BRANCH,
65 sizeof(*entry), trace_ctx);
66 if (!event)
67 goto out;
68
69 entry = ring_buffer_event_data(event);
70
71 /* Strip off the path, only save the file */
72 p = f->data.file + strlen(f->data.file);
73 while (p >= f->data.file && *p != '/')
74 p--;
75 p++;
76
77 strncpy(entry->func, f->data.func, TRACE_FUNC_SIZE);
78 strncpy(entry->file, p, TRACE_FILE_SIZE);
79 entry->func[TRACE_FUNC_SIZE] = 0;
80 entry->file[TRACE_FILE_SIZE] = 0;
81 entry->constant = f->constant;
82 entry->line = f->data.line;
83 entry->correct = val == expect;
84
85 if (!call_filter_check_discard(call, entry, buffer, event))
86 trace_buffer_unlock_commit_nostack(buffer, event);
87
88 out:
89 current->trace_recursion &= ~TRACE_BRANCH_BIT;
90 raw_local_irq_restore(flags);
91 }
92
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org