linux-kernel - [tip:irq/drivers 11/18] drivers/irqchip/irq-imx-mu-msi.c:419:9: error: call to undeclared function 'imx_mu_probe'; ISO C99 and later do not support implicit function declarations

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Message-ID: <202510162256.hpgem8Ii-lkp@intel.com>
Date: Thu, 16 Oct 2025 22:58:25 +0800
From: kernel test robot <lkp@...el.com>
To: Johan Hovold <johan@...nel.org>
Cc: llvm@...ts.linux.dev, oe-kbuild-all@...ts.linux.dev,
	linux-kernel@...r.kernel.org, x86@...nel.org,
	Thomas Gleixner <tglx@...utronix.de>,
	Florian Fainelli <florian.fainelli@...adcom.com>,
	Changhuang Liang <changhuang.liang@...rfivetech.com>
Subject: [tip:irq/drivers 11/18] drivers/irqchip/irq-imx-mu-msi.c:419:9:
 error: call to undeclared function 'imx_mu_probe'; ISO C99 and later do not
 support implicit function declarations

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git irq/drivers
head:   45f8fdcfbf4e49075172cf1a3fd812b90160e903
commit: 4265aed28d7de2a643b8e441bc25344f421f2f78 [11/18] irqchip: Pass platform device to platform drivers
config: arm-randconfig-003-20251016 (https://download.01.org/0day-ci/archive/20251016/202510162256.hpgem8Ii-lkp@intel.com/config)
compiler: clang version 22.0.0git (https://github.com/llvm/llvm-project 754ebc6ebb9fb9fbee7aef33478c74ea74949853)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251016/202510162256.hpgem8Ii-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@...el.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202510162256.hpgem8Ii-lkp@intel.com/

All errors (new ones prefixed by >>):

>> drivers/irqchip/irq-imx-mu-msi.c:419:9: error: call to undeclared function 'imx_mu_probe'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
     419 |         return imx_mu_probe(pdev, parent, &imx_mu_cfg_imx7ulp);
         |                ^
   drivers/irqchip/irq-imx-mu-msi.c:419:9: note: did you mean 'imx_mu_write'?
   drivers/irqchip/irq-imx-mu-msi.c:73:13: note: 'imx_mu_write' declared here
      73 | static void imx_mu_write(struct imx_mu_msi *msi_data, u32 val, u32 offs)
         |             ^
   drivers/irqchip/irq-imx-mu-msi.c:424:9: error: call to undeclared function 'imx_mu_probe'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
     424 |         return imx_mu_probe(pdev, parent, &imx_mu_cfg_imx6sx);
         |                ^
   drivers/irqchip/irq-imx-mu-msi.c:429:9: error: call to undeclared function 'imx_mu_probe'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
     429 |         return imx_mu_probe(pdev, parent, &imx_mu_cfg_imx8ulp);
         |                ^
   3 errors generated.


vim +/imx_mu_probe +419 drivers/irqchip/irq-imx-mu-msi.c

   416	
   417	static int imx_mu_imx7ulp_probe(struct platform_device *pdev, struct device_node *parent)
   418	{
 > 419		return imx_mu_probe(pdev, parent, &imx_mu_cfg_imx7ulp);
   420	}
   421	

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