[platform-drivers-x86:review-andy 44/55] drivers/platform/x86/ideapad-laptop.c:659:5: warning: no previous prototype for 'dytc_profile_get'

[kernel test robot <lkp@intel.com>]

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tree:   git://git.infradead.org/linux-platform-drivers-x86.git review-andy
head:   60accc011af0ff869875b1ded81cbd0948267f05
commit: eabe533904cbcb6c7df530fd807cf2a3c3567d35 [44/55] platform/x86: ideapad-laptop: DYTC Platform profile support
config: i386-randconfig-r021-20210203 (attached as .config)
compiler: gcc-9 (Debian 9.3.0-15) 9.3.0
reproduce (this is a W=1 build):
        git remote add platform-drivers-x86 git://git.infradead.org/linux-platform-drivers-x86.git
        git fetch --no-tags platform-drivers-x86 review-andy
        git checkout eabe533904cbcb6c7df530fd807cf2a3c3567d35
        # save the attached .config to linux build tree
        make W=1 ARCH=i386 

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

All warnings (new ones prefixed by >>):

>> drivers/platform/x86/ideapad-laptop.c:659:5: warning: no previous prototype for 'dytc_profile_get' [-Wmissing-prototypes]
     659 | int dytc_profile_get(struct platform_profile_handler *pprof,
         |     ^~~~~~~~~~~~~~~~
>> drivers/platform/x86/ideapad-laptop.c:676:5: warning: no previous prototype for 'dytc_cql_command' [-Wmissing-prototypes]
     676 | int dytc_cql_command(struct ideapad_private *priv, int command, int *output)
         |     ^~~~~~~~~~~~~~~~
>> drivers/platform/x86/ideapad-laptop.c:713:5: warning: no previous prototype for 'dytc_profile_set' [-Wmissing-prototypes]
     713 | int dytc_profile_set(struct platform_profile_handler *pprof,
         |     ^~~~~~~~~~~~~~~~


vim +/dytc_profile_get +659 drivers/platform/x86/ideapad-laptop.c

   654	
   655	/*
   656	 * dytc_profile_get: Function to register with platform_profile
   657	 * handler. Returns current platform profile.
   658	 */
 > 659	int dytc_profile_get(struct platform_profile_handler *pprof,
   660				enum platform_profile_option *profile)
   661	{
   662		struct ideapad_dytc_priv *dytc;
   663	
   664		dytc = container_of(pprof, struct ideapad_dytc_priv, pprof);
   665		*profile = dytc->current_profile;
   666		return 0;
   667	}
   668	
   669	/*
   670	 * Helper function - check if we are in CQL mode and if we are
   671	 *  -  disable CQL,
   672	 *  - run the command
   673	 *  - enable CQL
   674	 *  If not in CQL mode, just run the command
   675	 */
 > 676	int dytc_cql_command(struct ideapad_private *priv, int command, int *output)
   677	{
   678		int err, cmd_err, dummy;
   679		int cur_funcmode;
   680	
   681		/* Determine if we are in CQL mode. This alters the commands we do */
   682		err = method_dytc(priv->adev->handle, DYTC_CMD_GET, output);
   683		if (err)
   684			return err;
   685	
   686		cur_funcmode = (*output >> DYTC_GET_FUNCTION_BIT) & 0xF;
   687		/* Check if we're OK to return immediately */
   688		if ((command == DYTC_CMD_GET) && (cur_funcmode != DYTC_FUNCTION_CQL))
   689			return 0;
   690	
   691		if (cur_funcmode == DYTC_FUNCTION_CQL) {
   692			err = method_dytc(priv->adev->handle, DYTC_DISABLE_CQL, &dummy);
   693			if (err)
   694				return err;
   695		}
   696	
   697		cmd_err = method_dytc(priv->adev->handle, command,	output);
   698		/* Check return condition after we've restored CQL state */
   699	
   700		if (cur_funcmode == DYTC_FUNCTION_CQL) {
   701			err = method_dytc(priv->adev->handle, DYTC_ENABLE_CQL, &dummy);
   702			if (err)
   703				return err;
   704		}
   705	
   706		return cmd_err;
   707	}
   708	
   709	/*
   710	 * dytc_profile_set: Function to register with platform_profile
   711	 * handler. Sets current platform profile.
   712	 */
 > 713	int dytc_profile_set(struct platform_profile_handler *pprof,
   714				enum platform_profile_option profile)
   715	{
   716		struct ideapad_dytc_priv *dytc;
   717		struct ideapad_private *priv;
   718		int output;
   719		int err;
   720	
   721		dytc = container_of(pprof, struct ideapad_dytc_priv, pprof);
   722		priv = dytc->priv;
   723	
   724		err = mutex_lock_interruptible(&dytc->mutex);
   725		if (err)
   726			return err;
   727	
   728		if (profile == PLATFORM_PROFILE_BALANCED) {
   729			/* To get back to balanced mode we just issue a reset command */
   730			err = method_dytc(priv->adev->handle, DYTC_CMD_RESET, &output);
   731			if (err)
   732				goto unlock;
   733		} else {
   734			int perfmode;
   735	
   736			err = convert_profile_to_dytc(profile, &perfmode);
   737			if (err)
   738				goto unlock;
   739	
   740			/* Determine if we are in CQL mode. This alters the commands we do */
   741			err = dytc_cql_command(priv,
   742					DYTC_SET_COMMAND(DYTC_FUNCTION_MMC, perfmode, 1),
   743					&output);
   744			if (err)
   745				goto unlock;
   746		}
   747		/* Success - update current profile */
   748		dytc->current_profile = profile;
   749	unlock:
   750		mutex_unlock(&dytc->mutex);
   751		return err;
   752	}
   753	

---
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