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X-CSE-ConnectionGUID: OpyWuMX3QdCu05y+mhDZkQ== X-CSE-MsgGUID: Xf6/KeiQTw+WpTTdatYvjQ== X-IronPort-AV: E=McAfee;i="6800,10657,11683"; a="82028038" X-IronPort-AV: E=Sophos;i="6.21,256,1763452800"; d="scan'208";a="82028038" Received: from fmviesa006.fm.intel.com ([10.60.135.146]) by fmvoesa104.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 26 Jan 2026 16:36:42 -0800 X-CSE-ConnectionGUID: w4DQ1H3TS6C30Xwc7ckvKg== X-CSE-MsgGUID: cwyLD+X9T/WycIprKZfqwQ== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.21,256,1763452800"; d="scan'208";a="207701754" Received: from lkp-server01.sh.intel.com (HELO 765f4a05e27f) ([10.239.97.150]) by fmviesa006.fm.intel.com with ESMTP; 26 Jan 2026 16:36:40 -0800 Received: from kbuild by 765f4a05e27f with local (Exim 4.98.2) (envelope-from ) id 1vkX4Q-00000000Xo2-0eKN; Tue, 27 Jan 2026 00:36:38 +0000 Date: Tue, 27 Jan 2026 08:36:30 +0800 From: kernel test robot To: Paul Mackerras Cc: oe-kbuild-all@lists.linux.dev, linux-kernel@vger.kernel.org, Madhavan Srinivasan Subject: arch/powerpc/platforms/microwatt/smp.c:79:24: sparse: sparse: cast removes address space '__iomem' of expression Message-ID: <202601270858.uYxcZR9p-lkp@intel.com> User-Agent: s-nail v14.9.25 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: fcb70a56f4d81450114034b2c61f48ce7444a0e2 commit: aca95fb6bb572a77f39d42d83ab72a965026577d powerpc/microwatt: Add SMP support date: 11 months ago config: powerpc64-randconfig-r123-20260126 (https://download.01.org/0day-ci/archive/20260127/202601270858.uYxcZR9p-lkp@intel.com/config) compiler: clang version 22.0.0git (https://github.com/llvm/llvm-project 9b8addffa70cee5b2acc5454712d9cf78ce45710) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260127/202601270858.uYxcZR9p-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/202601270858.uYxcZR9p-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