[linux-next:master 2571/12912] drivers/ntb/hw/intel/ntb_hw_gen4.c:449:5: warning: no previous prototype for function 'intel_ntb4_link_disable'

[linux-next:master 2571/12912] drivers/ntb/hw/intel/ntb_hw_gen4.c:449:5: warning: no previous prototype for function 'intel_ntb4_link_disable'

[kbuild test robot]

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Hi Dave,

FYI, the error/warning still remains.

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
head:   b0523c7b1c9d0edcd6c0fe6d2cb558a9ad5c60a8
commit: 26bfe3d0b227ab6d38692640b44ce48f2d857602 [2571/12912] ntb: intel: Add Icelake (gen4) support for Intel NTB
config: x86_64-randconfig-r002-20200526 (attached as .config)
compiler: clang version 11.0.0 (https://github.com/llvm/llvm-project 3393cc4cebf9969db94dc424b7a2b6195589c33b)
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # install x86_64 cross compiling tool for clang build
        # apt-get install binutils-x86-64-linux-gnu
        git checkout 26bfe3d0b227ab6d38692640b44ce48f2d857602
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64 

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

All warnings (new ones prefixed by >>, old ones prefixed by <<):

>> drivers/ntb/hw/intel/ntb_hw_gen4.c:449:5: warning: no previous prototype for function 'intel_ntb4_link_disable' [-Wmissing-prototypes]
int intel_ntb4_link_disable(struct ntb_dev *ntb)
^
drivers/ntb/hw/intel/ntb_hw_gen4.c:449:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
int intel_ntb4_link_disable(struct ntb_dev *ntb)
^
static
1 warning generated.

vim +/intel_ntb4_link_disable +449 drivers/ntb/hw/intel/ntb_hw_gen4.c

   448	
 > 449	int intel_ntb4_link_disable(struct ntb_dev *ntb)
   450	{
   451		struct intel_ntb_dev *ndev;
   452		u32 ntb_cntl;
   453		u16 lnkctl;
   454	
   455		ndev = container_of(ntb, struct intel_ntb_dev, ntb);
   456	
   457		dev_dbg(&ntb->pdev->dev, "Disabling link\n");
   458	
   459		/* clear the snoop bits */
   460		ntb_cntl = ioread32(ndev->self_mmio + ndev->reg->ntb_ctl);
   461		ntb_cntl &= ~(NTB_CTL_E2I_BAR23_SNOOP | NTB_CTL_I2E_BAR23_SNOOP);
   462		ntb_cntl &= ~(NTB_CTL_E2I_BAR45_SNOOP | NTB_CTL_I2E_BAR45_SNOOP);
   463		iowrite32(ntb_cntl, ndev->self_mmio + ndev->reg->ntb_ctl);
   464	
   465		lnkctl = ioread16(ndev->self_mmio + GEN4_LINK_CTRL_OFFSET);
   466		lnkctl |= GEN4_LINK_CTRL_LINK_DISABLE;
   467		iowrite16(lnkctl, ndev->self_mmio + GEN4_LINK_CTRL_OFFSET);
   468	
   469		ndev->dev_up = 0;
   470	
   471		return 0;
   472	}
   473	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all(a)lists.01.org

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