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charset=us-ascii Content-Disposition: inline tree: https://github.com/linuxppc/linux next head: 861efb8a48ee8b73ae4e8817509cd4e82fd52bc4 commit: aca95fb6bb572a77f39d42d83ab72a965026577d [55/61] powerpc/microwatt: Add SMP support config: powerpc64-randconfig-r122-20250314 (https://download.01.org/0day-ci/archive/20250314/202503141407.ioF2BsGi-lkp@intel.com/config) compiler: powerpc64-linux-gcc (GCC) 14.2.0 reproduce: (https://download.01.org/0day-ci/archive/20250314/202503141407.ioF2BsGi-lkp@intel.com/reproduce) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot | Closes: https://lore.kernel.org/oe-kbuild-all/202503141407.ioF2BsGi-lkp@intel.com/ sparse warnings: (new ones prefixed by >>) >> arch/powerpc/platforms/microwatt/smp.c:79:24: sparse: sparse: cast removes address space '__iomem' of expression >> arch/powerpc/platforms/microwatt/smp.c:79:24: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected void [noderef] __iomem *addr @@ got void * @@ arch/powerpc/platforms/microwatt/smp.c:79:24: sparse: expected void [noderef] __iomem *addr arch/powerpc/platforms/microwatt/smp.c:79:24: sparse: got void * vim +/__iomem +79 arch/powerpc/platforms/microwatt/smp.c 42 43 void __init microwatt_init_smp(void) 44 { 45 volatile unsigned char __iomem *syscon; 46 int ncpus; 47 int timeout; 48 49 syscon = early_ioremap(SYSCON_BASE, SYSCON_LENGTH); 50 if (syscon == NULL) { 51 pr_err("Failed to map SYSCON\n"); 52 return; 53 } 54 ncpus = (readl(syscon + SYSCON_CPU_CTRL) >> 8) & 0xff; 55 if (ncpus < 2) 56 goto out; 57 58 smp_ops = µwatt_smp_ops; 59 60 /* 61 * Write two instructions at location 0: 62 * mfspr r3, PIR 63 * b __secondary_hold 64 */ 65 *(unsigned int *)KERNELBASE = PPC_RAW_MFSPR(3, SPRN_PIR); 66 *(unsigned int *)(KERNELBASE+4) = PPC_RAW_BRANCH(&__secondary_hold - (char *)(KERNELBASE+4)); 67 68 /* enable the other CPUs, they start at location 0 */ 69 writel((1ul << ncpus) - 1, syscon + SYSCON_CPU_CTRL); 70 71 timeout = 10000; 72 while (!__secondary_hold_acknowledge) { 73 if (--timeout == 0) 74 break; 75 barrier(); 76 } 77 78 out: > 79 early_iounmap((void *)syscon, SYSCON_LENGTH); -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki