arch/mips/bcm47xx/prom.c:129:6: warning: no previous prototype for function 'early_tlb_init'
From: kernel test robot
Date: Thu Apr 13 2023 - 08:43:00 EST
Hi Paul,
First bad commit (maybe != root cause):
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: de4664485abbc0529b1eec44d0061bbfe58a28fb
commit: c434b9f80b0923e6460031b0fd964f8b0bf3c6a6 MIPS: Kconfig: add MIPS_GENERIC_KERNEL symbol
date: 2 years, 7 months ago
config: mips-buildonly-randconfig-r005-20230413 (https://download.01.org/0day-ci/archive/20230413/202304132001.mawtrQpw-lkp@xxxxxxxxx/config)
compiler: clang version 17.0.0 (https://github.com/llvm/llvm-project 9638da200e00bd069e6dd63604e14cbafede9324)
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 mips cross compiling tool for clang build
# apt-get install binutils-mipsel-linux-gnu
# https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=c434b9f80b0923e6460031b0fd964f8b0bf3c6a6
git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
git fetch --no-tags linus master
git checkout c434b9f80b0923e6460031b0fd964f8b0bf3c6a6
# save the config file
mkdir build_dir && cp config build_dir/.config
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=mips olddefconfig
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=mips SHELL=/bin/bash arch/mips/bcm47xx/ drivers/gpio/ drivers/mfd/ drivers/regulator/ drivers/soc/mediatek/ drivers/thermal/
If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@xxxxxxxxx>
| Link: https://lore.kernel.org/oe-kbuild-all/202304132001.mawtrQpw-lkp@xxxxxxxxx/
All warnings (new ones prefixed by >>):
>> arch/mips/bcm47xx/prom.c:129:6: warning: no previous prototype for function 'early_tlb_init' [-Wmissing-prototypes]
void early_tlb_init(void)
^
arch/mips/bcm47xx/prom.c:129:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
void early_tlb_init(void)
^
static
>> arch/mips/bcm47xx/prom.c:137:13: warning: no previous prototype for function 'bcm47xx_prom_highmem_init' [-Wmissing-prototypes]
void __init bcm47xx_prom_highmem_init(void)
^
arch/mips/bcm47xx/prom.c:137:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
void __init bcm47xx_prom_highmem_init(void)
^
static
2 warnings generated.
--
>> drivers/gpio/gpio-zx.c:275:34: warning: unused variable 'zx_gpio_match' [-Wunused-const-variable]
static const struct of_device_id zx_gpio_match[] = {
^
1 warning generated.
--
>> drivers/mfd/max77686.c:148:34: warning: unused variable 'max77686_pmic_dt_match' [-Wunused-const-variable]
static const struct of_device_id max77686_pmic_dt_match[] = {
^
1 warning generated.
--
>> drivers/regulator/mp886x.c:258:34: warning: unused variable 'mp886x_dt_ids' [-Wunused-const-variable]
static const struct of_device_id mp886x_dt_ids[] = {
^
1 warning generated.
--
>> drivers/thermal/thermal_mmio.c:103:34: warning: unused variable 'thermal_mmio_id_table' [-Wunused-const-variable]
static const struct of_device_id thermal_mmio_id_table[] = {
^
1 warning generated.
--
>> drivers/soc/mediatek/mtk-pmic-wrap.c:1842:34: warning: unused variable 'of_slave_match_tbl' [-Wunused-const-variable]
static const struct of_device_id of_slave_match_tbl[] = {
^
>> drivers/soc/mediatek/mtk-pmic-wrap.c:1988:34: warning: unused variable 'of_pwrap_match_tbl' [-Wunused-const-variable]
static const struct of_device_id of_pwrap_match_tbl[] = {
^
2 warnings generated.
vim +/early_tlb_init +129 arch/mips/bcm47xx/prom.c
6ee1d93455384ce Rafał Miłecki 2014-07-17 125
6ee1d93455384ce Rafał Miłecki 2014-07-17 126 /* Stripped version of tlb_init, with the call to build_tlb_refill_handler
6ee1d93455384ce Rafał Miłecki 2014-07-17 127 * dropped. Calling it at this stage causes a hang.
6ee1d93455384ce Rafał Miłecki 2014-07-17 128 */
b1f7e1129097cdb Paul Gortmaker 2015-04-27 @129 void early_tlb_init(void)
6ee1d93455384ce Rafał Miłecki 2014-07-17 130 {
6ee1d93455384ce Rafał Miłecki 2014-07-17 131 write_c0_pagemask(PM_DEFAULT_MASK);
6ee1d93455384ce Rafał Miłecki 2014-07-17 132 write_c0_wired(0);
6ee1d93455384ce Rafał Miłecki 2014-07-17 133 temp_tlb_entry = current_cpu_data.tlbsize - 1;
6ee1d93455384ce Rafał Miłecki 2014-07-17 134 local_flush_tlb_all();
6ee1d93455384ce Rafał Miłecki 2014-07-17 135 }
6ee1d93455384ce Rafał Miłecki 2014-07-17 136
6ee1d93455384ce Rafał Miłecki 2014-07-17 @137 void __init bcm47xx_prom_highmem_init(void)
6ee1d93455384ce Rafał Miłecki 2014-07-17 138 {
6ee1d93455384ce Rafał Miłecki 2014-07-17 139 unsigned long off = (unsigned long)prom_init;
6ee1d93455384ce Rafał Miłecki 2014-07-17 140 unsigned long extmem = 0;
6ee1d93455384ce Rafał Miłecki 2014-07-17 141 bool highmem_region = false;
6ee1d93455384ce Rafał Miłecki 2014-07-17 142
6ee1d93455384ce Rafał Miłecki 2014-07-17 143 if (WARN_ON(bcm47xx_bus_type != BCM47XX_BUS_TYPE_BCMA))
6ee1d93455384ce Rafał Miłecki 2014-07-17 144 return;
6ee1d93455384ce Rafał Miłecki 2014-07-17 145
6ee1d93455384ce Rafał Miłecki 2014-07-17 146 if (bcm47xx_bus.bcma.bus.chipinfo.id == BCMA_CHIP_ID_BCM4706)
6ee1d93455384ce Rafał Miłecki 2014-07-17 147 highmem_region = true;
6ee1d93455384ce Rafał Miłecki 2014-07-17 148
6ee1d93455384ce Rafał Miłecki 2014-07-17 149 if (lowmem != 128 << 20 || !highmem_region)
6ee1d93455384ce Rafał Miłecki 2014-07-17 150 return;
6ee1d93455384ce Rafał Miłecki 2014-07-17 151
6ee1d93455384ce Rafał Miłecki 2014-07-17 152 early_tlb_init();
6ee1d93455384ce Rafał Miłecki 2014-07-17 153
6ee1d93455384ce Rafał Miłecki 2014-07-17 154 /* Add one temporary TLB entry to map SDRAM Region 2.
6ee1d93455384ce Rafał Miłecki 2014-07-17 155 * Physical Virtual
6ee1d93455384ce Rafał Miłecki 2014-07-17 156 * 0x80000000 0xc0000000 (1st: 256MB)
6ee1d93455384ce Rafał Miłecki 2014-07-17 157 * 0x90000000 0xd0000000 (2nd: 256MB)
6ee1d93455384ce Rafał Miłecki 2014-07-17 158 */
6ee1d93455384ce Rafał Miłecki 2014-07-17 159 add_temporary_entry(ENTRYLO(0x80000000),
6ee1d93455384ce Rafał Miłecki 2014-07-17 160 ENTRYLO(0x80000000 + (256 << 20)),
6ee1d93455384ce Rafał Miłecki 2014-07-17 161 EXTVBASE, PM_256M);
6ee1d93455384ce Rafał Miłecki 2014-07-17 162
6ee1d93455384ce Rafał Miłecki 2014-07-17 163 off = EXTVBASE + __pa(off);
6ee1d93455384ce Rafał Miłecki 2014-07-17 164 for (extmem = 128 << 20; extmem < 512 << 20; extmem <<= 1) {
6ee1d93455384ce Rafał Miłecki 2014-07-17 165 if (!memcmp(prom_init, (void *)(off + extmem), 16))
6ee1d93455384ce Rafał Miłecki 2014-07-17 166 break;
6ee1d93455384ce Rafał Miłecki 2014-07-17 167 }
6ee1d93455384ce Rafał Miłecki 2014-07-17 168 extmem -= lowmem;
6ee1d93455384ce Rafał Miłecki 2014-07-17 169
6ee1d93455384ce Rafał Miłecki 2014-07-17 170 early_tlb_init();
6ee1d93455384ce Rafał Miłecki 2014-07-17 171
6ee1d93455384ce Rafał Miłecki 2014-07-17 172 if (!extmem)
6ee1d93455384ce Rafał Miłecki 2014-07-17 173 return;
6ee1d93455384ce Rafał Miłecki 2014-07-17 174
6ee1d93455384ce Rafał Miłecki 2014-07-17 175 pr_warn("Found %lu MiB of extra memory, but highmem is unsupported yet!\n",
6ee1d93455384ce Rafał Miłecki 2014-07-17 176 extmem >> 20);
6ee1d93455384ce Rafał Miłecki 2014-07-17 177
6ee1d93455384ce Rafał Miłecki 2014-07-17 178 /* TODO: Register extra memory */
6ee1d93455384ce Rafał Miłecki 2014-07-17 179 }
6ee1d93455384ce Rafał Miłecki 2014-07-17 180
:::::: The code at line 129 was first introduced by commit
:::::: b1f7e1129097cdb5cf2d6ef5d365dc94d13e3c76 MIPS: BCM77xx: Remove legacy __cpuinit{,data} sections that crept in
:::::: TO: Paul Gortmaker <paul.gortmaker@xxxxxxxxxxxxx>
:::::: CC: Ralf Baechle <ralf@xxxxxxxxxxxxxx>
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests