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Subjectarch/mips/sgi-ip27/ip27-init.c:123:2: error: implicit declaration of function 'register_smp_ops'
Hi Thomas,

FYI, the error/warning still remains.

tree: master
head: 9ebcfadb0610322ac537dd7aa5d9cbc2b2894c68
commit: c823f416097879515a02f3d97aecc1204ffc0773 MIPS: SGI-IP27: move registering of smp ops into IP27 specific code
date: 8 months ago
config: mips-randconfig-r036-20200629 (attached as .config)
compiler: mips64-linux-gcc (GCC) 9.3.0
reproduce (this is a W=1 build):
wget -O ~/bin/make.cross
chmod +x ~/bin/make.cross
git checkout c823f416097879515a02f3d97aecc1204ffc0773
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=mips

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

All errors (new ones prefixed by >>):

arch/mips/sgi-ip27/ip27-init.c:118:13: warning: no previous prototype for 'plat_mem_setup' [-Wmissing-prototypes]
118 | void __init plat_mem_setup(void)
| ^~~~~~~~~~~~~~
arch/mips/sgi-ip27/ip27-init.c: In function 'plat_mem_setup':
>> arch/mips/sgi-ip27/ip27-init.c:123:2: error: implicit declaration of function 'register_smp_ops' [-Werror=implicit-function-declaration]
123 | register_smp_ops(&ip27_smp_ops);
| ^~~~~~~~~~~~~~~~
cc1: some warnings being treated as errors

vim +/register_smp_ops +123 arch/mips/sgi-ip27/ip27-init.c

> 118 void __init plat_mem_setup(void)
119 {
120 u64 p, e, n_mode;
121 nasid_t nid;
> 123 register_smp_ops(&ip27_smp_ops);

0-DAY CI Kernel Test Service, Intel Corporation
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