[daveh-devel:kss 31/32] arch/x86/kernel/cet.c:204:6: warning: no previous prototype for function 'regs_set_return_ip'

[daveh-devel:kss 31/32] arch/x86/kernel/cet.c:204:6: warning: no previous prototype for function 'regs_set_return_ip'

[kernel test robot]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/daveh/devel.git kss
head:   1b2e2aefa6c7e3d15fac1b25a971b2d2cc3b697d
commit: ca107dce40b82cc491ac08e03e01626956ca5eb4 [31/32] fred-entry-ssp-muck
config: x86_64-kexec (https://download.01.org/0day-ci/archive/20261019/202610190320.LiuXeUz8-lkp@intel.com/config)
compiler: clang version 22.1.8 (https://github.com/llvm/llvm-project ca7933e47d3a3451d81e72ac174dcb5aa28b59d1)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20261019/202610190320.LiuXeUz8-lkp@intel.com/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 <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202610190320.LiuXeUz8-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> arch/x86/kernel/cet.c:204:6: warning: no previous prototype for function 'regs_set_return_ip' [-Wmissing-prototypes]
     204 | void regs_set_return_ip(struct pt_regs *regs, unsigned long ip)
         |      ^
   arch/x86/kernel/cet.c:204:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
     204 | void regs_set_return_ip(struct pt_regs *regs, unsigned long ip)
         | ^
         | static 
   1 warning generated.


vim +/regs_set_return_ip +204 arch/x86/kernel/cet.c

   193	
   194	/*
   195	 * Change the return IP of an event. Use this instead of directly
   196	 * manipulating regs->ip.
   197	 *
   198	 * The hardware saves a special FRED entry frame on to the shadow
   199	 * stack. It contains the RIP of the interrupted context. ERETS
   200	 * ensures that this matches regs->ip.
   201	 *
   202	 * Update the FRED entry frame in addition to regs->ip.
   203	 */
 > 204	void regs_set_return_ip(struct pt_regs *regs, unsigned long ip)
   205	{
   206		struct fred_shstk_entry_frame *ssef;
   207	
   208		regs->ip = ip;
   209	
   210		/* Only kernel-mode events save the 'ssef' pointer. */
   211		WARN_ON_ONCE(user_mode(regs));
   212	

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https://github.com/intel/lkp-tests/wiki