Re: [PATCH 11/11] block: use standard blktrace API to output cgroup info for debug notes

From: kbuild test robot
Date: Fri Jun 02 2017 - 22:00:38 EST


Hi Shaohua,

[auto build test ERROR on driver-core/driver-core-testing]
[also build test ERROR on v4.12-rc3 next-20170602]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]

url: https://github.com/0day-ci/linux/commits/Shaohua-Li/kernfs-implement-i_generation/20170603-083132
config: x86_64-randconfig-x015-201722 (attached as .config)
compiler: gcc-6 (Debian 6.2.0-3) 6.2.0 20160901
reproduce:
# save the attached .config to linux build tree
make ARCH=x86_64

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

block/blk-throttle.c: In function 'throtl_schedule_pending_timer':
>> block/blk-throttle.c:355:3: error: implicit declaration of function 'blk_add_cgroup_trace_msg' [-Werror=implicit-function-declaration]
blk_add_cgroup_trace_msg(__td->queue, \
^
>> block/blk-throttle.c:697:2: note: in expansion of macro 'throtl_log'
throtl_log(sq, "schedule timer. delay=%lu jiffies=%lu",
^~~~~~~~~~
cc1: some warnings being treated as errors

vim +/blk_add_cgroup_trace_msg +355 block/blk-throttle.c

349 struct throtl_data *__td = sq_to_td((sq)); \
350 \
351 (void)__td; \
352 if (likely(!blk_trace_note_message_enabled(__td->queue))) \
353 break; \
354 if ((__tg)) { \
> 355 blk_add_cgroup_trace_msg(__td->queue, \
356 tg_to_blkg(__tg)->blkcg, "throtl " fmt, ##args);\
357 } else { \
358 blk_add_trace_msg(__td->queue, "throtl " fmt, ##args); \

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