On 2019/4/7 23:46, Alexey Dobriyan wrote: > On Sun, Apr 07, 2019 at 09:02:38PM +0800, Li, Aubrey wrote: >> On 2019/4/7 5:41, Alexey Dobriyan wrote: >>> On Fri, Apr 05, 2019 at 09:32:35PM +0200, Thomas Gleixner wrote: >>>>> +/* Add support for architecture specific output in /proc/pid/status */ >>>>> +extern void arch_proc_pid_status(struct seq_file *m, struct task_struct *task); >>> ^^^^^^ >>> >>> Unnecessary extern. >>> >> The linkage is default extern, but with this functions and variables >> can be treated the same way. >> >> Is it mandatory not to use it explicitly? ./script/checkpatch.pl did >> not report this. > > "extern" is only necessary for variables. For prototypes, it is more typing > and more characters on the screen. > > checkpatch.pl doesn't report it because opening floodgates is not the plan. > > Yours, > Extern Police. > No problem, Mr. Police, I can remove it in the next version. Thanks, -Aubrey