[kbuild-all] arch/arm/mach-ixp4xx/common-pci.c:143:5: warning: no previous prototype for 'ixp4xx_pci_write'

tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: cb690f5238d71f543f4ce874aa59237cf53a877c commit: d5d9f7ac58ea1041375a028f143ca5784693ea86 ARM/ixp4xx: Make NEED_MACH_IO_H optional date: 5 months ago config: arm-randconfig-r011-20211018 (attached as .config) compiler: arm-linux-gnueabi-gcc (GCC) 11.2.0 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 # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit... 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 attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross ARCH=arm If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>): arch/arm/mach-ixp4xx/common-pci.c:94:5: warning: no previous prototype for 'ixp4xx_pci_read_errata' [-Wmissing-prototypes] 94 | int ixp4xx_pci_read_errata(u32 addr, u32 cmd, u32* data) | ^~~~~~~~~~~~~~~~~~~~~~ arch/arm/mach-ixp4xx/common-pci.c:121:5: warning: no previous prototype for 'ixp4xx_pci_read_no_errata' [-Wmissing-prototypes] 121 | int ixp4xx_pci_read_no_errata(u32 addr, u32 cmd, u32* data) | ^~~~~~~~~~~~~~~~~~~~~~~~~ 143 | int ixp4xx_pci_write(u32 addr, u32 cmd, u32 data) | ^~~~~~~~~~~~~~~~ Kconfig warnings: (for reference only) WARNING: unmet direct dependencies detected for QCOM_SCM Depends on (ARM || ARM64) && HAVE_ARM_SMCCC Selected by - ARM_QCOM_SPM_CPUIDLE && CPU_IDLE && (ARM || ARM64) && (ARCH_QCOM || COMPILE_TEST && !ARM64 && MMU vim +/ixp4xx_pci_write +143 arch/arm/mach-ixp4xx/common-pci.c ^1da177e4c3f41 Linus Torvalds 2005-04-16 93 ^1da177e4c3f41 Linus Torvalds 2005-04-16 @94 int ixp4xx_pci_read_errata(u32 addr, u32 cmd, u32* data) ^1da177e4c3f41 Linus Torvalds 2005-04-16 95 { ^1da177e4c3f41 Linus Torvalds 2005-04-16 96 unsigned long flags; ^1da177e4c3f41 Linus Torvalds 2005-04-16 97 int retval = 0; ^1da177e4c3f41 Linus Torvalds 2005-04-16 98 int i; ^1da177e4c3f41 Linus Torvalds 2005-04-16 99 bd31b85960a7fc Thomas Gleixner 2009-07-03 100 raw_spin_lock_irqsave(&ixp4xx_pci_lock, flags); ^1da177e4c3f41 Linus Torvalds 2005-04-16 101 ^1da177e4c3f41 Linus Torvalds 2005-04-16 102 *PCI_NP_AD = addr; ^1da177e4c3f41 Linus Torvalds 2005-04-16 103 ^1da177e4c3f41 Linus Torvalds 2005-04-16 104 /* ^1da177e4c3f41 Linus Torvalds 2005-04-16 105 * PCI workaround - only works if NP PCI space reads have ^1da177e4c3f41 Linus Torvalds 2005-04-16 106 * no side effects!!! Read 8 times. last one will be good. ^1da177e4c3f41 Linus Torvalds 2005-04-16 107 */ ^1da177e4c3f41 Linus Torvalds 2005-04-16 108 for (i = 0; i < 8; i++) { ^1da177e4c3f41 Linus Torvalds 2005-04-16 109 *PCI_NP_CBE = cmd; ^1da177e4c3f41 Linus Torvalds 2005-04-16 110 *data = *PCI_NP_RDATA; ^1da177e4c3f41 Linus Torvalds 2005-04-16 111 *data = *PCI_NP_RDATA; ^1da177e4c3f41 Linus Torvalds 2005-04-16 112 } ^1da177e4c3f41 Linus Torvalds 2005-04-16 113 ^1da177e4c3f41 Linus Torvalds 2005-04-16 114 if(check_master_abort()) ^1da177e4c3f41 Linus Torvalds 2005-04-16 115 retval = 1; ^1da177e4c3f41 Linus Torvalds 2005-04-16 116 bd31b85960a7fc Thomas Gleixner 2009-07-03 117 raw_spin_unlock_irqrestore(&ixp4xx_pci_lock, flags); ^1da177e4c3f41 Linus Torvalds 2005-04-16 118 return retval; ^1da177e4c3f41 Linus Torvalds 2005-04-16 119 } ^1da177e4c3f41 Linus Torvalds 2005-04-16 120 ^1da177e4c3f41 Linus Torvalds 2005-04-16 121 int ixp4xx_pci_read_no_errata(u32 addr, u32 cmd, u32* data) ^1da177e4c3f41 Linus Torvalds 2005-04-16 122 { ^1da177e4c3f41 Linus Torvalds 2005-04-16 123 unsigned long flags; ^1da177e4c3f41 Linus Torvalds 2005-04-16 124 int retval = 0; ^1da177e4c3f41 Linus Torvalds 2005-04-16 125 bd31b85960a7fc Thomas Gleixner 2009-07-03 126 raw_spin_lock_irqsave(&ixp4xx_pci_lock, flags); ^1da177e4c3f41 Linus Torvalds 2005-04-16 127 ^1da177e4c3f41 Linus Torvalds 2005-04-16 128 *PCI_NP_AD = addr; ^1da177e4c3f41 Linus Torvalds 2005-04-16 129 ^1da177e4c3f41 Linus Torvalds 2005-04-16 130 /* set up and execute the read */ ^1da177e4c3f41 Linus Torvalds 2005-04-16 131 *PCI_NP_CBE = cmd; ^1da177e4c3f41 Linus Torvalds 2005-04-16 132 ^1da177e4c3f41 Linus Torvalds 2005-04-16 133 /* the result of the read is now in NP_RDATA */ ^1da177e4c3f41 Linus Torvalds 2005-04-16 134 *data = *PCI_NP_RDATA; ^1da177e4c3f41 Linus Torvalds 2005-04-16 135 ^1da177e4c3f41 Linus Torvalds 2005-04-16 136 if(check_master_abort()) ^1da177e4c3f41 Linus Torvalds 2005-04-16 137 retval = 1; ^1da177e4c3f41 Linus Torvalds 2005-04-16 138 bd31b85960a7fc Thomas Gleixner 2009-07-03 139 raw_spin_unlock_irqrestore(&ixp4xx_pci_lock, flags); ^1da177e4c3f41 Linus Torvalds 2005-04-16 140 return retval; ^1da177e4c3f41 Linus Torvalds 2005-04-16 141 } ^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(a)ppc970.osdl.org&gt; :::::: CC: Linus Torvalds <torvalds(a)ppc970.osdl.org&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org