tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 4b6c093e21d36bede0fd88fd0aeb3b03647260e4 commit: 670d0a4b10704667765f7d18f7592993d02783aa sparse: use identifiers to define address spaces date: 8 weeks ago config: mips-randconfig-s032-20200814 (attached as .config) compiler: mips-linux-gcc (GCC) 9.3.0 reproduce: wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # apt-get install sparse # sparse version: v0.6.2-168-g9554805c-dirty git checkout 670d0a4b10704667765f7d18f7592993d02783aa # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=mips If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; sparse warnings: (new ones prefixed by >>) arch/mips/lantiq/falcon/prom.c:43:9: sparse: got void * arch/mips/lantiq/falcon/prom.c:39:13: sparse: sparse: symbol 'ltq_soc_nmi_setup' was not declared. Should it be static? arch/mips/lantiq/falcon/prom.c:50:9: sparse: sparse: incorrect type in argument 2 (different address spaces) @@ expected void volatile [noderef] __iomem *mem @@ got void * @@ arch/mips/lantiq/falcon/prom.c:50:9: sparse: expected void volatile [noderef] __iomem *mem arch/mips/lantiq/falcon/prom.c:50:9: sparse: got void * arch/mips/lantiq/falcon/prom.c:46:13: sparse: sparse: symbol 'ltq_soc_ejtag_setup' was not declared. Should it be static? arch/mips/lantiq/falcon/prom.c:56:23: sparse: got unsigned int [usertype] * arch/mips/lantiq/falcon/prom.c:57:19: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected void const volatile [noderef] __iomem *mem @@ got unsigned int [usertype] * @@ arch/mips/lantiq/falcon/prom.c:57:19: sparse: expected void const volatile [noderef] __iomem *mem arch/mips/lantiq/falcon/prom.c:57:19: sparse: got unsigned int [usertype] * arch/mips/lantiq/falcon/prom.c:58:21: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected void const volatile [noderef] __iomem *mem @@ got unsigned int [usertype] * @@ arch/mips/lantiq/falcon/prom.c:58:21: sparse: expected void const volatile [noderef] __iomem *mem arch/mips/lantiq/falcon/prom.c:58:21: sparse: got unsigned int [usertype] * arch/mips/lantiq/falcon/prom.c:66:25: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected void const volatile [noderef] __iomem *mem @@ got unsigned int [usertype] * @@ arch/mips/lantiq/falcon/prom.c:66:25: sparse: expected void const volatile [noderef] __iomem *mem arch/mips/lantiq/falcon/prom.c:66:25: sparse: got unsigned int [usertype] * -- arch/mips/lantiq/falcon/reset.c:40:9: sparse: got void * arch/mips/lantiq/falcon/reset.c:41:9: sparse: sparse: incorrect type in argument 2 (different address spaces) @@ expected void volatile [noderef] __iomem *mem @@ got void * @@ arch/mips/lantiq/falcon/reset.c:41:9: sparse: expected void volatile [noderef] __iomem *mem arch/mips/lantiq/falcon/reset.c:41:9: sparse: got void * arch/mips/lantiq/falcon/reset.c:42:9: sparse: sparse: incorrect type in argument 2 (different address spaces) @@ expected void volatile [noderef] __iomem *mem @@ got void * @@ arch/mips/lantiq/falcon/reset.c:42:9: sparse: expected void volatile [noderef] __iomem *mem arch/mips/lantiq/falcon/reset.c:42:9: sparse: got void * arch/mips/lantiq/falcon/reset.c:45:9: sparse: sparse: incorrect type in argument 2 (different address spaces) @@ expected void volatile [noderef] __iomem *mem @@ got void * @@ arch/mips/lantiq/falcon/reset.c:45:9: sparse: expected void volatile [noderef] __iomem *mem arch/mips/lantiq/falcon/reset.c:45:9: sparse: got void * arch/mips/lantiq/falcon/reset.c:46:9: sparse: sparse: incorrect type in argument 2 (different address spaces) @@ expected void volatile [noderef] __iomem *mem @@ got void * @@ arch/mips/lantiq/falcon/reset.c:46:9: sparse: expected void volatile [noderef] __iomem *mem arch/mips/lantiq/falcon/reset.c:46:9: sparse: got void * vim +43 arch/mips/lantiq/falcon/prom.c d41ced01f21ddd2 John Crispin 2012-04-19 38 d41ced01f21ddd2 John Crispin 2012-04-19 39 void __init ltq_soc_nmi_setup(void) d41ced01f21ddd2 John Crispin 2012-04-19 40 { d41ced01f21ddd2 John Crispin 2012-04-19 41 extern void (*nmi_handler)(void); d41ced01f21ddd2 John Crispin 2012-04-19 42 d41ced01f21ddd2 John Crispin 2012-04-19 @43 ltq_w32((unsigned long)&nmi_handler, (void *)BOOT_NVEC); d41ced01f21ddd2 John Crispin 2012-04-19 44 } d41ced01f21ddd2 John Crispin 2012-04-19 45 d41ced01f21ddd2 John Crispin 2012-04-19 46 void __init ltq_soc_ejtag_setup(void) d41ced01f21ddd2 John Crispin 2012-04-19 47 { d41ced01f21ddd2 John Crispin 2012-04-19 48 extern void (*ejtag_debug_handler)(void); d41ced01f21ddd2 John Crispin 2012-04-19 49 d41ced01f21ddd2 John Crispin 2012-04-19 50 ltq_w32((unsigned long)&ejtag_debug_handler, (void *)BOOT_EVEC); d41ced01f21ddd2 John Crispin 2012-04-19 51 } d41ced01f21ddd2 John Crispin 2012-04-19 52 d41ced01f21ddd2 John Crispin 2012-04-19 53 void __init ltq_soc_detect(struct ltq_soc_info *i) d41ced01f21ddd2 John Crispin 2012-04-19 54 { d41ced01f21ddd2 John Crispin 2012-04-19 55 u32 type; d41ced01f21ddd2 John Crispin 2012-04-19 @56 i->partnum = (ltq_r32(FALCON_CHIPID) & PART_MASK) >> PART_SHIFT; :::::: The code at line 43 was first introduced by commit :::::: d41ced01f21ddd2c3a01531bb9edf6c41064e9fc MIPS: lantiq: implement support for FALCON soc :::::: TO: John Crispin <blogic(a)openwrt.org&gt; :::::: CC: Ralf Baechle <ralf(a)linux-mips.org&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org