linux-kernel - arch/arm/mach-ixp4xx/common-pci.c:143:5: warning: no previous prototype for function 'ixp4xx_pci

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Date:   Thu, 13 Jan 2022 01:20:43 +0800
From:   kernel test robot <lkp@...el.com>
To:     Linus Walleij <linus.walleij@...aro.org>
Cc:     llvm@...ts.linux.dev, kbuild-all@...ts.01.org,
        linux-kernel@...r.kernel.org
Subject: arch/arm/mach-ixp4xx/common-pci.c:143:5: warning: no previous
 prototype for function 'ixp4xx_pci_write'

Hi Linus,

FYI, the error/warning still remains.

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   daadb3bd0e8d3e317e36bc2c1542e86c528665e5
commit: d5d9f7ac58ea1041375a028f143ca5784693ea86 ARM/ixp4xx: Make NEED_MACH_IO_H optional
date:   7 months ago
config: arm-ixp4xx_defconfig (https://download.01.org/0day-ci/archive/20220113/202201130136.7675O5xx-lkp@intel.com/config)
compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project 244dd2913a43a200f5a6544d424cdc37b771028b)
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 arm cross compiling tool for clang build
        # apt-get install binutils-arm-linux-gnueabi
        # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=d5d9f7ac58ea1041375a028f143ca5784693ea86
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout d5d9f7ac58ea1041375a028f143ca5784693ea86
        # save the config file to linux build tree
        mkdir build_dir
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=arm SHELL=/bin/bash

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

All warnings (new ones prefixed by >>):

   arch/arm/mach-ixp4xx/common-pci.c:94:5: warning: no previous prototype for function 'ixp4xx_pci_read_errata' [-Wmissing-prototypes]
   int ixp4xx_pci_read_errata(u32 addr, u32 cmd, u32* data)
       ^
   arch/arm/mach-ixp4xx/common-pci.c:94:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   int ixp4xx_pci_read_errata(u32 addr, u32 cmd, u32* data)
   ^
   static 
   arch/arm/mach-ixp4xx/common-pci.c:121:5: warning: no previous prototype for function 'ixp4xx_pci_read_no_errata' [-Wmissing-prototypes]
   int ixp4xx_pci_read_no_errata(u32 addr, u32 cmd, u32* data)
       ^
   arch/arm/mach-ixp4xx/common-pci.c:121:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   int ixp4xx_pci_read_no_errata(u32 addr, u32 cmd, u32* data)
   ^
   static 
>> arch/arm/mach-ixp4xx/common-pci.c:143:5: warning: no previous prototype for function 'ixp4xx_pci_write' [-Wmissing-prototypes]
   int ixp4xx_pci_write(u32 addr, u32 cmd, u32 data)
       ^
   arch/arm/mach-ixp4xx/common-pci.c:143:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   int ixp4xx_pci_write(u32 addr, u32 cmd, u32 data)
   ^
   static 
   3 warnings generated.


vim +/ixp4xx_pci_write +143 arch/arm/mach-ixp4xx/common-pci.c

^1da177e4c3f41 Linus Torvalds  2005-04-16  142  
^1da177e4c3f41 Linus Torvalds  2005-04-16 @143  int ixp4xx_pci_write(u32 addr, u32 cmd, u32 data)
^1da177e4c3f41 Linus Torvalds  2005-04-16  144  {    
^1da177e4c3f41 Linus Torvalds  2005-04-16  145  	unsigned long flags;
^1da177e4c3f41 Linus Torvalds  2005-04-16  146  	int retval = 0;
^1da177e4c3f41 Linus Torvalds  2005-04-16  147  
bd31b85960a7fc Thomas Gleixner 2009-07-03  148  	raw_spin_lock_irqsave(&ixp4xx_pci_lock, flags);
^1da177e4c3f41 Linus Torvalds  2005-04-16  149  
^1da177e4c3f41 Linus Torvalds  2005-04-16  150  	*PCI_NP_AD = addr;
^1da177e4c3f41 Linus Torvalds  2005-04-16  151  
^1da177e4c3f41 Linus Torvalds  2005-04-16  152  	/* set up the write */
^1da177e4c3f41 Linus Torvalds  2005-04-16  153  	*PCI_NP_CBE = cmd;
^1da177e4c3f41 Linus Torvalds  2005-04-16  154  
^1da177e4c3f41 Linus Torvalds  2005-04-16  155  	/* execute the write by writing to NP_WDATA */
^1da177e4c3f41 Linus Torvalds  2005-04-16  156  	*PCI_NP_WDATA = data;
^1da177e4c3f41 Linus Torvalds  2005-04-16  157  
^1da177e4c3f41 Linus Torvalds  2005-04-16  158  	if(check_master_abort())
^1da177e4c3f41 Linus Torvalds  2005-04-16  159  		retval = 1;
^1da177e4c3f41 Linus Torvalds  2005-04-16  160  
bd31b85960a7fc Thomas Gleixner 2009-07-03  161  	raw_spin_unlock_irqrestore(&ixp4xx_pci_lock, flags);
^1da177e4c3f41 Linus Torvalds  2005-04-16  162  	return retval;
^1da177e4c3f41 Linus Torvalds  2005-04-16  163  }
^1da177e4c3f41 Linus Torvalds  2005-04-16  164  

:::::: The code at line 143 was first introduced by commit
:::::: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Linux-2.6.12-rc2

:::::: TO: Linus Torvalds <torvalds@...970.osdl.org>
:::::: CC: Linus Torvalds <torvalds@...970.osdl.org>

---
0-DAY CI Kernel Test Service, Intel Corporation
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