kernel/pid.c:767:12: warning: 'proc_do_cad_pid' defined but not used

tree:   https://github.com/intel-lab-lkp/linux/commits/Oleg-Nesterov/sysctl-remove-CONFIG_PROC_SYSCTL-it-just-mirrors-CONFIG_SYSCTL/20260727-231232
head:   3e7984a76e1b74111e982852c01663e6f6f6dabe
commit: 3e7984a76e1b74111e982852c01663e6f6f6dabe sysctl: remove CONFIG_PROC_SYSCTL, it just mirrors CONFIG_SYSCTL
date:   9 hours ago
config: x86_64-rhel-9.4-bpf (https://download.01.org/0day-ci/archive/20260728/[email protected]/config)
compiler: gcc-14 (Debian 14.2.0-19) 14.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260728/[email protected]/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <[email protected]>
| Closes: https://lore.kernel.org/oe-kbuild-all/[email protected]/

All warnings (new ones prefixed by >>):

>> kernel/pid.c:767:12: warning: 'proc_do_cad_pid' defined but not used [-Wunused-function]
     767 | static int proc_do_cad_pid(const struct ctl_table *table, int write, void *buffer,
         |            ^~~~~~~~~~~~~~~


vim +/proc_do_cad_pid +767 kernel/pid.c

7863dcc72d0f4b Christian Brauner 2024-11-22  766  
e054bcbe7e7af2 Joel Granados     2025-05-05 @767  static int proc_do_cad_pid(const struct ctl_table *table, int write, void *buffer,
e054bcbe7e7af2 Joel Granados     2025-05-05  768  		size_t *lenp, loff_t *ppos)
e054bcbe7e7af2 Joel Granados     2025-05-05  769  {
e054bcbe7e7af2 Joel Granados     2025-05-05  770  	struct pid *new_pid;
e054bcbe7e7af2 Joel Granados     2025-05-05  771  	pid_t tmp_pid;
e054bcbe7e7af2 Joel Granados     2025-05-05  772  	int r;
e054bcbe7e7af2 Joel Granados     2025-05-05  773  	struct ctl_table tmp_table = *table;
e054bcbe7e7af2 Joel Granados     2025-05-05  774  
e054bcbe7e7af2 Joel Granados     2025-05-05  775  	tmp_pid = pid_vnr(cad_pid);
e054bcbe7e7af2 Joel Granados     2025-05-05  776  	tmp_table.data = &tmp_pid;
e054bcbe7e7af2 Joel Granados     2025-05-05  777  
e054bcbe7e7af2 Joel Granados     2025-05-05  778  	r = proc_dointvec(&tmp_table, write, buffer, lenp, ppos);
e054bcbe7e7af2 Joel Granados     2025-05-05  779  	if (r || !write)
e054bcbe7e7af2 Joel Granados     2025-05-05  780  		return r;
e054bcbe7e7af2 Joel Granados     2025-05-05  781  
e054bcbe7e7af2 Joel Granados     2025-05-05  782  	new_pid = find_get_pid(tmp_pid);
e054bcbe7e7af2 Joel Granados     2025-05-05  783  	if (!new_pid)
e054bcbe7e7af2 Joel Granados     2025-05-05  784  		return -ESRCH;
e054bcbe7e7af2 Joel Granados     2025-05-05  785  
e054bcbe7e7af2 Joel Granados     2025-05-05  786  	put_pid(xchg(&cad_pid, new_pid));
e054bcbe7e7af2 Joel Granados     2025-05-05  787  	return 0;
e054bcbe7e7af2 Joel Granados     2025-05-05  788  }
e054bcbe7e7af2 Joel Granados     2025-05-05  789  

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