Re: [PATCH v5 21/22] tracing/boot: Add function tracer filter options

kbuild test robot
2019-12-26T18:06:01Z

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Hi Masami,

I love your patch! Yet something to improve:

[auto build test ERROR on trace/for-next]
[also build test ERROR on lwn/docs-next linus/master v5.5-rc3]
[cannot apply to tip/perf/core next-20191220]
[if your patch is applied to the wrong git tree, please drop us a note to help
improve the system. BTW, we also suggest to use '--base' option to specify the
base tree in git format-patch, please see https://stackoverflow.com/a/37406982]

url: https://github.com/0day-ci/linux/commits/Masami-Hiramatsu/tracing-bootconfig-Boot-time-tracing-and-Extra-boot-config/20191227-002009
base: https://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace.git for-next
config: xtensa-allyesconfig (attached as .config)
compiler: xtensa-linux-gcc (GCC) 7.5.0
reproduce:
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# save the attached .config to linux build tree
GCC_VERSION=7.5.0 make.cross ARCH=xtensa

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

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

In file included from kernel/trace/trace_boot.c:9:0:
>> include/linux/ftrace.h:719:50: error: expected identifier or '(' before '{' token
#define ftrace_set_filter(ops, buf, len, reset) ({ -ENODEV; })
^
>> kernel/trace/trace_boot.c:249:12: note: in expansion of macro 'ftrace_set_filter'
extern int ftrace_set_filter(struct ftrace_ops *ops, unsigned char *buf,
^~~~~~~~~~~~~~~~~
include/linux/ftrace.h:720:51: error: expected identifier or '(' before '{' token
#define ftrace_set_notrace(ops, buf, len, reset) ({ -ENODEV; })
^
>> kernel/trace/trace_boot.c:251:12: note: in expansion of macro 'ftrace_set_notrace'
extern int ftrace_set_notrace(struct ftrace_ops *ops, unsigned char *buf,
^~~~~~~~~~~~~~~~~~
--
In file included from kernel//trace/trace_boot.c:9:0:
>> include/linux/ftrace.h:719:50: error: expected identifier or '(' before '{' token
#define ftrace_set_filter(ops, buf, len, reset) ({ -ENODEV; })
^
kernel//trace/trace_boot.c:249:12: note: in expansion of macro 'ftrace_set_filter'
extern int ftrace_set_filter(struct ftrace_ops *ops, unsigned char *buf,
^~~~~~~~~~~~~~~~~
include/linux/ftrace.h:720:51: error: expected identifier or '(' before '{' token
#define ftrace_set_notrace(ops, buf, len, reset) ({ -ENODEV; })
^
kernel//trace/trace_boot.c:251:12: note: in expansion of macro 'ftrace_set_notrace'
extern int ftrace_set_notrace(struct ftrace_ops *ops, unsigned char *buf,
^~~~~~~~~~~~~~~~~~

vim +/ftrace_set_filter +249 kernel/trace/trace_boot.c

246
247 #ifdef CONFIG_FUNCTION_TRACER
248 extern bool ftrace_filter_param __initdata;
> 249 extern int ftrace_set_filter(struct ftrace_ops *ops, unsigned char *buf,
250 int len, int reset);
> 251 extern int ftrace_set_notrace(struct ftrace_ops *ops, unsigned char *buf,
252 int len, int reset);
253 static void __init
254 trace_boot_set_ftrace_filter(struct trace_array *tr, struct xbc_node *node)
255 {
256 struct xbc_node *anode;
257 const char *p;
258 char *q;
259
260 xbc_node_for_each_array_value(node, "ftrace.filters", anode, p) {
261 q = kstrdup(p, GFP_KERNEL);
262 if (!q)
263 return;
264 if (ftrace_set_filter(tr->ops, q, strlen(q), 0) < 0)
265 pr_err("Failed to add %s to ftrace filter\n", p);
266 else
267 ftrace_filter_param = true;
268 kfree(q);
269 }
270 xbc_node_for_each_array_value(node, "ftrace.notraces", anode, p) {
271 q = kstrdup(p, GFP_KERNEL);
272 if (!q)
273 return;
274 if (ftrace_set_notrace(tr->ops, q, strlen(q), 0) < 0)
275 pr_err("Failed to add %s to ftrace filter\n", p);
276 else
277 ftrace_filter_param = true;
278 kfree(q);
279 }
280 }
281 #else
282 #define trace_boot_set_ftrace_filter(tr, node) do {} while (0)
283 #endif
284

---
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