From: kernel test robot <lkp@intel.com>
To: Himanshu Chauhan <himanshu.chauhan@oss.qualcomm.com>
Cc: llvm@lists.linux.dev, oe-kbuild-all@lists.linux.dev,
Anup Patel <anup@brainfault.org>
Subject: [avpatel:riscv_sbi_dbtr_v2 61/62] arch/riscv/kernel/hw_breakpoint.c:44:16: error: variable has incomplete type 'struct sbiret'
Date: Tue, 17 Feb 2026 03:14:33 +0800 [thread overview]
Message-ID: <202602170318.7w2o0rVB-lkp@intel.com> (raw)
tree: https://github.com/avpatel/linux.git riscv_sbi_dbtr_v2
head: 66b69ab7fb5601c86982a276040e718ba54a8569
commit: dcbfaa5a331231162ca9597079b7bc15bd1307fd [61/62] riscv: Introduce support for hardware break/watchpoints
config: riscv-nommu_k210_defconfig (https://download.01.org/0day-ci/archive/20260217/202602170318.7w2o0rVB-lkp@intel.com/config)
compiler: clang version 23.0.0git (https://github.com/llvm/llvm-project e86750b29fa0ff207cd43213d66dabe565417638)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260217/202602170318.7w2o0rVB-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 <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202602170318.7w2o0rVB-lkp@intel.com/
All errors (new ones prefixed by >>):
In file included from include/linux/interrupt.h:11:
In file included from include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from include/asm-generic/hardirq.h:17:
In file included from include/linux/irq.h:20:
In file included from include/linux/io.h:12:
In file included from arch/riscv/include/asm/io.h:140:
include/asm-generic/io.h:846:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
846 | insw(addr, buffer, count);
| ^~~~~~~~~~~~~~~~~~~~~~~~~
arch/riscv/include/asm/io.h:109:53: note: expanded from macro 'insw'
109 | #define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
| ~~~~~~~~~~ ^
In file included from arch/riscv/kernel/hw_breakpoint.c:6:
In file included from include/linux/hw_breakpoint.h:5:
In file included from include/linux/perf_event.h:43:
In file included from include/linux/ftrace.h:10:
In file included from include/linux/trace_recursion.h:5:
In file included from include/linux/interrupt.h:11:
In file included from include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from include/asm-generic/hardirq.h:17:
In file included from include/linux/irq.h:20:
In file included from include/linux/io.h:12:
In file included from arch/riscv/include/asm/io.h:140:
include/asm-generic/io.h:854:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
854 | insl(addr, buffer, count);
| ^~~~~~~~~~~~~~~~~~~~~~~~~
arch/riscv/include/asm/io.h:110:53: note: expanded from macro 'insl'
110 | #define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
| ~~~~~~~~~~ ^
In file included from arch/riscv/kernel/hw_breakpoint.c:6:
In file included from include/linux/hw_breakpoint.h:5:
In file included from include/linux/perf_event.h:43:
In file included from include/linux/ftrace.h:10:
In file included from include/linux/trace_recursion.h:5:
In file included from include/linux/interrupt.h:11:
In file included from include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from include/asm-generic/hardirq.h:17:
In file included from include/linux/irq.h:20:
In file included from include/linux/io.h:12:
In file included from arch/riscv/include/asm/io.h:140:
include/asm-generic/io.h:863:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
863 | outsb(addr, buffer, count);
| ^~~~~~~~~~~~~~~~~~~~~~~~~~
arch/riscv/include/asm/io.h:122:55: note: expanded from macro 'outsb'
122 | #define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
| ~~~~~~~~~~ ^
In file included from arch/riscv/kernel/hw_breakpoint.c:6:
In file included from include/linux/hw_breakpoint.h:5:
In file included from include/linux/perf_event.h:43:
In file included from include/linux/ftrace.h:10:
In file included from include/linux/trace_recursion.h:5:
In file included from include/linux/interrupt.h:11:
In file included from include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from include/asm-generic/hardirq.h:17:
In file included from include/linux/irq.h:20:
In file included from include/linux/io.h:12:
In file included from arch/riscv/include/asm/io.h:140:
include/asm-generic/io.h:872:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
872 | outsw(addr, buffer, count);
| ^~~~~~~~~~~~~~~~~~~~~~~~~~
arch/riscv/include/asm/io.h:123:55: note: expanded from macro 'outsw'
123 | #define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
| ~~~~~~~~~~ ^
In file included from arch/riscv/kernel/hw_breakpoint.c:6:
In file included from include/linux/hw_breakpoint.h:5:
In file included from include/linux/perf_event.h:43:
In file included from include/linux/ftrace.h:10:
In file included from include/linux/trace_recursion.h:5:
In file included from include/linux/interrupt.h:11:
In file included from include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from include/asm-generic/hardirq.h:17:
In file included from include/linux/irq.h:20:
In file included from include/linux/io.h:12:
In file included from arch/riscv/include/asm/io.h:140:
include/asm-generic/io.h:881:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
881 | outsl(addr, buffer, count);
| ^~~~~~~~~~~~~~~~~~~~~~~~~~
arch/riscv/include/asm/io.h:124:55: note: expanded from macro 'outsl'
124 | #define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
| ~~~~~~~~~~ ^
In file included from arch/riscv/kernel/hw_breakpoint.c:6:
In file included from include/linux/hw_breakpoint.h:5:
In file included from include/linux/perf_event.h:43:
In file included from include/linux/ftrace.h:10:
In file included from include/linux/trace_recursion.h:5:
In file included from include/linux/interrupt.h:11:
In file included from include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from include/asm-generic/hardirq.h:17:
In file included from include/linux/irq.h:20:
In file included from include/linux/io.h:12:
In file included from arch/riscv/include/asm/io.h:140:
include/asm-generic/io.h:1209:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
1209 | return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
| ~~~~~~~~~~ ^
>> arch/riscv/kernel/hw_breakpoint.c:44:16: error: variable has incomplete type 'struct sbiret'
44 | struct sbiret ret;
| ^
arch/riscv/kernel/hw_breakpoint.c:44:9: note: forward declaration of 'struct sbiret'
44 | struct sbiret ret;
| ^
>> arch/riscv/kernel/hw_breakpoint.c:47:15: error: arithmetic on a pointer to an incomplete type 'union sbi_dbtr_shmem_entry'
47 | dbtr_shmem = per_cpu_ptr(sbi_dbtr_shmem, cpu);
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/percpu-defs.h:239:2: note: expanded from macro 'per_cpu_ptr'
239 | __verify_pcpu_ptr(ptr); \
| ^~~~~~~~~~~~~~~~~~~~~~
include/linux/percpu-defs.h:221:52: note: expanded from macro '__verify_pcpu_ptr'
221 | const void __percpu *__vpp_verify = (typeof((ptr) + 0))NULL; \
| ~~~~~ ^
arch/riscv/kernel/hw_breakpoint.c:23:14: note: forward declaration of 'union sbi_dbtr_shmem_entry'
23 | static union sbi_dbtr_shmem_entry __percpu *sbi_dbtr_shmem;
| ^
>> arch/riscv/kernel/hw_breakpoint.c:55:8: error: call to undeclared function 'sbi_ecall'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
55 | ret = sbi_ecall(SBI_EXT_DBTR, SBI_EXT_DBTR_SETUP_SHMEM,
| ^
>> arch/riscv/kernel/hw_breakpoint.c:55:18: error: use of undeclared identifier 'SBI_EXT_DBTR'
55 | ret = sbi_ecall(SBI_EXT_DBTR, SBI_EXT_DBTR_SETUP_SHMEM,
| ^~~~~~~~~~~~
>> arch/riscv/kernel/hw_breakpoint.c:55:32: error: use of undeclared identifier 'SBI_EXT_DBTR_SETUP_SHMEM'
55 | ret = sbi_ecall(SBI_EXT_DBTR, SBI_EXT_DBTR_SETUP_SHMEM,
| ^~~~~~~~~~~~~~~~~~~~~~~~
>> arch/riscv/kernel/hw_breakpoint.c:60:8: error: use of undeclared identifier 'SBI_ERR_DENIED'
60 | case SBI_ERR_DENIED:
| ^~~~~~~~~~~~~~
>> arch/riscv/kernel/hw_breakpoint.c:66:8: error: use of undeclared identifier 'SBI_ERR_INVALID_PARAM'
66 | case SBI_ERR_INVALID_PARAM:
| ^~~~~~~~~~~~~~~~~~~~~
>> arch/riscv/kernel/hw_breakpoint.c:67:8: error: use of undeclared identifier 'SBI_ERR_INVALID_ADDRESS'
67 | case SBI_ERR_INVALID_ADDRESS:
| ^~~~~~~~~~~~~~~~~~~~~~~
>> arch/riscv/kernel/hw_breakpoint.c:73:8: error: use of undeclared identifier 'SBI_ERR_ALREADY_AVAILABLE'
73 | case SBI_ERR_ALREADY_AVAILABLE:
| ^~~~~~~~~~~~~~~~~~~~~~~~~
>> arch/riscv/kernel/hw_breakpoint.c:79:8: error: use of undeclared identifier 'SBI_ERR_FAILURE'
79 | case SBI_ERR_FAILURE:
| ^~~~~~~~~~~~~~~
arch/riscv/kernel/hw_breakpoint.c:99:16: error: variable has incomplete type 'struct sbiret'
99 | struct sbiret ret;
| ^
arch/riscv/kernel/hw_breakpoint.c:99:9: note: forward declaration of 'struct sbiret'
99 | struct sbiret ret;
| ^
arch/riscv/kernel/hw_breakpoint.c:102:8: error: call to undeclared function 'sbi_ecall'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
102 | ret = sbi_ecall(SBI_EXT_DBTR, SBI_EXT_DBTR_SETUP_SHMEM,
| ^
arch/riscv/kernel/hw_breakpoint.c:102:18: error: use of undeclared identifier 'SBI_EXT_DBTR'
102 | ret = sbi_ecall(SBI_EXT_DBTR, SBI_EXT_DBTR_SETUP_SHMEM,
| ^~~~~~~~~~~~
arch/riscv/kernel/hw_breakpoint.c:102:32: error: use of undeclared identifier 'SBI_EXT_DBTR_SETUP_SHMEM'
102 | ret = sbi_ecall(SBI_EXT_DBTR, SBI_EXT_DBTR_SETUP_SHMEM,
| ^~~~~~~~~~~~~~~~~~~~~~~~
arch/riscv/kernel/hw_breakpoint.c:107:8: error: use of undeclared identifier 'SBI_ERR_DENIED'
107 | case SBI_ERR_DENIED:
| ^~~~~~~~~~~~~~
arch/riscv/kernel/hw_breakpoint.c:112:8: error: use of undeclared identifier 'SBI_ERR_INVALID_PARAM'
112 | case SBI_ERR_INVALID_PARAM:
| ^~~~~~~~~~~~~~~~~~~~~
arch/riscv/kernel/hw_breakpoint.c:113:8: error: use of undeclared identifier 'SBI_ERR_INVALID_ADDRESS'
113 | case SBI_ERR_INVALID_ADDRESS:
| ^~~~~~~~~~~~~~~~~~~~~~~
arch/riscv/kernel/hw_breakpoint.c:118:8: error: use of undeclared identifier 'SBI_ERR_ALREADY_AVAILABLE'
118 | case SBI_ERR_ALREADY_AVAILABLE:
| ^~~~~~~~~~~~~~~~~~~~~~~~~
arch/riscv/kernel/hw_breakpoint.c:122:8: error: use of undeclared identifier 'SBI_ERR_FAILURE'
122 | case SBI_ERR_FAILURE:
| ^~~~~~~~~~~~~~~
fatal error: too many errors emitted, stopping now [-ferror-limit=]
7 warnings and 20 errors generated.
vim +44 arch/riscv/kernel/hw_breakpoint.c
39
40 static int arch_smp_setup_sbi_shmem(unsigned int cpu)
41 {
42 union sbi_dbtr_shmem_entry *dbtr_shmem;
43 unsigned long shmem_pa;
> 44 struct sbiret ret;
45 int rc = 0;
46
> 47 dbtr_shmem = per_cpu_ptr(sbi_dbtr_shmem, cpu);
48 if (!dbtr_shmem) {
49 pr_err("Invalid per-cpu shared memory for debug triggers\n");
50 return -ENODEV;
51 }
52
53 shmem_pa = __pa(dbtr_shmem);
54
> 55 ret = sbi_ecall(SBI_EXT_DBTR, SBI_EXT_DBTR_SETUP_SHMEM,
56 MEM_LO(shmem_pa), MEM_HI(shmem_pa), 0, 0, 0, 0);
57
58 if (ret.error) {
59 switch (ret.error) {
> 60 case SBI_ERR_DENIED:
61 pr_warn("%s: Access denied for shared memory at %lx\n",
62 __func__, shmem_pa);
63 rc = -EPERM;
64 break;
65
> 66 case SBI_ERR_INVALID_PARAM:
> 67 case SBI_ERR_INVALID_ADDRESS:
68 pr_warn("%s: Invalid address parameter (%lu)\n",
69 __func__, ret.error);
70 rc = -EINVAL;
71 break;
72
> 73 case SBI_ERR_ALREADY_AVAILABLE:
74 pr_warn("%s: Shared memory is already set\n",
75 __func__);
76 rc = -EADDRINUSE;
77 break;
78
> 79 case SBI_ERR_FAILURE:
80 pr_err("%s: Internal sdtrig state error\n",
81 __func__);
82 rc = -ENXIO;
83 break;
84
85 default:
86 pr_warn("%s: Unknown error %lu\n", __func__, ret.error);
87 rc = -ENXIO;
88 break;
89 }
90 }
91
92 pr_info("CPU %d: HW Breakpoint shared memory registered.\n", cpu);
93
94 return rc;
95 }
96
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
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