kernel/rcu/tasks.h:1031:6: warning: no previous prototype for 'show_rcu_tasks_gp_kthreads'

From: kernel test robot
Date: Tue Apr 20 2021 - 02:57:21 EST

Hi Paul,

FYI, the error/warning still remains.

tree: master
head: 7af08140979a6e7e12b78c93b8625c8d25b084e2
commit: e21408ceec2de5be418efa39feb1e2c00f824a72 rcu-tasks: Add RCU tasks to rcutorture writer stall output
date: 12 months ago
config: h8300-allnoconfig (attached as .config)
compiler: h8300-linux-gcc (GCC) 9.3.0
reproduce (this is a W=1 build):
wget -O ~/bin/make.cross
chmod +x ~/bin/make.cross
git remote add linus
git fetch --no-tags linus master
git checkout e21408ceec2de5be418efa39feb1e2c00f824a72
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross W=1 ARCH=h8300

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@xxxxxxxxx>

All warnings (new ones prefixed by >>):

In file included from kernel/rcu/update.c:587:
>> kernel/rcu/tasks.h:1031:6: warning: no previous prototype for 'show_rcu_tasks_gp_kthreads' [-Wmissing-prototypes]
1031 | void show_rcu_tasks_gp_kthreads(void) {}
| ^~~~~~~~~~~~~~~~~~~~~~~~~~

vim +/show_rcu_tasks_gp_kthreads +1031 kernel/rcu/tasks.h

1029 #else /* #ifdef CONFIG_TASKS_RCU_GENERIC */
1030 static inline void rcu_tasks_bootup_oddness(void) {}
> 1031 void show_rcu_tasks_gp_kthreads(void) {}

0-DAY CI Kernel Test Service, Intel Corporation

Attachment: .config.gz
Description: application/gzip