* [avpatel:riscv_sbi_dbtr_v2 50/51] arch/riscv/kernel/hw_breakpoint.c:44:23: error: storage size of 'ret' isn't known
@ 2026-02-24 9:35 kernel test robot
0 siblings, 0 replies; only message in thread
From: kernel test robot @ 2026-02-24 9:35 UTC (permalink / raw)
To: Himanshu Chauhan; +Cc: oe-kbuild-all, Anup Patel
tree: https://github.com/avpatel/linux.git riscv_sbi_dbtr_v2
head: c006808ed6f2ee6e7ba3c10d59b188482907daa0
commit: 67a284dcf9e8d06570f83fde87405be0a97964e4 [50/51] riscv: Introduce support for hardware break/watchpoints
config: riscv-randconfig-001-20260224 (https://download.01.org/0day-ci/archive/20260224/202602241705.dEx9BCo7-lkp@intel.com/config)
compiler: riscv64-linux-gcc (GCC) 15.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260224/202602241705.dEx9BCo7-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/202602241705.dEx9BCo7-lkp@intel.com/
All errors (new ones prefixed by >>):
arch/riscv/kernel/hw_breakpoint.c: In function 'arch_smp_setup_sbi_shmem':
>> arch/riscv/kernel/hw_breakpoint.c:44:23: error: storage size of 'ret' isn't known
44 | struct sbiret ret;
| ^~~
In file included from include/asm-generic/percpu.h:9,
from ./arch/riscv/include/generated/asm/percpu.h:1,
from include/linux/alloc_tag.h:12,
from include/linux/percpu.h:5,
from include/asm-generic/local64.h:5,
from ./arch/riscv/include/generated/asm/local64.h:1,
from include/linux/perf_event.h:26,
from include/linux/hw_breakpoint.h:5,
from arch/riscv/kernel/hw_breakpoint.c:6:
>> include/linux/percpu-defs.h:221:59: error: invalid use of undefined type 'union sbi_dbtr_shmem_entry'
221 | const void __percpu *__vpp_verify = (typeof((ptr) + 0))NULL; \
| ^
include/linux/percpu-defs.h:239:9: note: in expansion of macro '__verify_pcpu_ptr'
239 | __verify_pcpu_ptr(ptr); \
| ^~~~~~~~~~~~~~~~~
arch/riscv/kernel/hw_breakpoint.c:47:22: note: in expansion of macro 'per_cpu_ptr'
47 | dbtr_shmem = per_cpu_ptr(sbi_dbtr_shmem, cpu);
| ^~~~~~~~~~~
>> arch/riscv/kernel/hw_breakpoint.c:55:15: error: implicit declaration of function 'sbi_ecall' [-Wimplicit-function-declaration]
55 | ret = sbi_ecall(SBI_EXT_DBTR, SBI_EXT_DBTR_SETUP_SHMEM,
| ^~~~~~~~~
>> arch/riscv/kernel/hw_breakpoint.c:55:25: error: 'SBI_EXT_DBTR' undeclared (first use in this function)
55 | ret = sbi_ecall(SBI_EXT_DBTR, SBI_EXT_DBTR_SETUP_SHMEM,
| ^~~~~~~~~~~~
arch/riscv/kernel/hw_breakpoint.c:55:25: note: each undeclared identifier is reported only once for each function it appears in
>> arch/riscv/kernel/hw_breakpoint.c:55:39: error: 'SBI_EXT_DBTR_SETUP_SHMEM' undeclared (first use in this function)
55 | ret = sbi_ecall(SBI_EXT_DBTR, SBI_EXT_DBTR_SETUP_SHMEM,
| ^~~~~~~~~~~~~~~~~~~~~~~~
>> arch/riscv/kernel/hw_breakpoint.c:60:22: error: 'SBI_ERR_DENIED' undeclared (first use in this function)
60 | case SBI_ERR_DENIED:
| ^~~~~~~~~~~~~~
>> arch/riscv/kernel/hw_breakpoint.c:66:22: error: 'SBI_ERR_INVALID_PARAM' undeclared (first use in this function)
66 | case SBI_ERR_INVALID_PARAM:
| ^~~~~~~~~~~~~~~~~~~~~
>> arch/riscv/kernel/hw_breakpoint.c:67:22: error: 'SBI_ERR_INVALID_ADDRESS' undeclared (first use in this function)
67 | case SBI_ERR_INVALID_ADDRESS:
| ^~~~~~~~~~~~~~~~~~~~~~~
arch/riscv/kernel/hw_breakpoint.c:73:22: error: 'SBI_ERR_ALREADY_AVAILABLE' undeclared (first use in this function)
73 | case SBI_ERR_ALREADY_AVAILABLE:
| ^~~~~~~~~~~~~~~~~~~~~~~~~
arch/riscv/kernel/hw_breakpoint.c:79:22: error: 'SBI_ERR_FAILURE' undeclared (first use in this function)
79 | case SBI_ERR_FAILURE:
| ^~~~~~~~~~~~~~~
arch/riscv/kernel/hw_breakpoint.c:44:23: warning: unused variable 'ret' [-Wunused-variable]
44 | struct sbiret ret;
| ^~~
arch/riscv/kernel/hw_breakpoint.c: In function 'arch_smp_teardown_sbi_shmem':
arch/riscv/kernel/hw_breakpoint.c:99:23: error: storage size of 'ret' isn't known
99 | struct sbiret ret;
| ^~~
arch/riscv/kernel/hw_breakpoint.c:102:25: error: 'SBI_EXT_DBTR' undeclared (first use in this function)
102 | ret = sbi_ecall(SBI_EXT_DBTR, SBI_EXT_DBTR_SETUP_SHMEM,
| ^~~~~~~~~~~~
arch/riscv/kernel/hw_breakpoint.c:102:39: error: 'SBI_EXT_DBTR_SETUP_SHMEM' undeclared (first use in this function)
102 | ret = sbi_ecall(SBI_EXT_DBTR, SBI_EXT_DBTR_SETUP_SHMEM,
| ^~~~~~~~~~~~~~~~~~~~~~~~
arch/riscv/kernel/hw_breakpoint.c:107:22: error: 'SBI_ERR_DENIED' undeclared (first use in this function)
107 | case SBI_ERR_DENIED:
| ^~~~~~~~~~~~~~
arch/riscv/kernel/hw_breakpoint.c:112:22: error: 'SBI_ERR_INVALID_PARAM' undeclared (first use in this function)
112 | case SBI_ERR_INVALID_PARAM:
| ^~~~~~~~~~~~~~~~~~~~~
arch/riscv/kernel/hw_breakpoint.c:113:22: error: 'SBI_ERR_INVALID_ADDRESS' undeclared (first use in this function)
113 | case SBI_ERR_INVALID_ADDRESS:
| ^~~~~~~~~~~~~~~~~~~~~~~
arch/riscv/kernel/hw_breakpoint.c:118:22: error: 'SBI_ERR_ALREADY_AVAILABLE' undeclared (first use in this function)
118 | case SBI_ERR_ALREADY_AVAILABLE:
| ^~~~~~~~~~~~~~~~~~~~~~~~~
arch/riscv/kernel/hw_breakpoint.c:122:22: error: 'SBI_ERR_FAILURE' undeclared (first use in this function)
122 | case SBI_ERR_FAILURE:
| ^~~~~~~~~~~~~~~
arch/riscv/kernel/hw_breakpoint.c:99:23: warning: unused variable 'ret' [-Wunused-variable]
99 | struct sbiret ret;
| ^~~
arch/riscv/kernel/hw_breakpoint.c: In function 'init_sbi_dbtr':
arch/riscv/kernel/hw_breakpoint.c:140:23: error: storage size of 'ret' isn't known
140 | struct sbiret ret;
| ^~~
arch/riscv/kernel/hw_breakpoint.c:142:13: error: implicit declaration of function 'sbi_probe_extension' [-Wimplicit-function-declaration]
142 | if (sbi_probe_extension(SBI_EXT_DBTR) <= 0) {
| ^~~~~~~~~~~~~~~~~~~
arch/riscv/kernel/hw_breakpoint.c:142:33: error: 'SBI_EXT_DBTR' undeclared (first use in this function)
142 | if (sbi_probe_extension(SBI_EXT_DBTR) <= 0) {
| ^~~~~~~~~~~~
arch/riscv/kernel/hw_breakpoint.c:148:39: error: 'SBI_EXT_DBTR_NUM_TRIGGERS' undeclared (first use in this function)
148 | ret = sbi_ecall(SBI_EXT_DBTR, SBI_EXT_DBTR_NUM_TRIGGERS,
| ^~~~~~~~~~~~~~~~~~~~~~~~~
arch/riscv/kernel/hw_breakpoint.c:140:23: warning: unused variable 'ret' [-Wunused-variable]
140 | struct sbiret ret;
| ^~~
arch/riscv/kernel/hw_breakpoint.c: In function 'arch_install_hw_breakpoint':
>> include/linux/percpu-defs.h:221:59: error: invalid use of undefined type 'union sbi_dbtr_shmem_entry'
221 | const void __percpu *__vpp_verify = (typeof((ptr) + 0))NULL; \
| ^
include/linux/percpu-defs.h:245:9: note: in expansion of macro '__verify_pcpu_ptr'
245 | __verify_pcpu_ptr(ptr); \
| ^~~~~~~~~~~~~~~~~
include/linux/percpu-defs.h:256:27: note: in expansion of macro 'raw_cpu_ptr'
256 | #define this_cpu_ptr(ptr) raw_cpu_ptr(ptr)
| ^~~~~~~~~~~
arch/riscv/kernel/hw_breakpoint.c:428:45: note: in expansion of macro 'this_cpu_ptr'
428 | union sbi_dbtr_shmem_entry *shmem = this_cpu_ptr(sbi_dbtr_shmem);
| ^~~~~~~~~~~~
arch/riscv/kernel/hw_breakpoint.c:433:23: error: storage size of 'ret' isn't known
433 | struct sbiret ret;
| ^~~
arch/riscv/kernel/hw_breakpoint.c:439:22: error: invalid use of undefined type 'union sbi_dbtr_shmem_entry'
439 | xmit = &shmem->data;
| ^~
arch/riscv/kernel/hw_breakpoint.c:440:22: error: invalid use of undefined type 'union sbi_dbtr_shmem_entry'
440 | recv = &shmem->id;
| ^~
arch/riscv/kernel/hw_breakpoint.c:441:13: error: invalid use of undefined type 'struct sbi_dbtr_data_msg'
441 | xmit->tdata1 = cpu_to_le(bp->tdata1);
| ^~
arch/riscv/kernel/hw_breakpoint.c:442:13: error: invalid use of undefined type 'struct sbi_dbtr_data_msg'
442 | xmit->tdata2 = cpu_to_le(bp->tdata2);
| ^~
arch/riscv/kernel/hw_breakpoint.c:443:13: error: invalid use of undefined type 'struct sbi_dbtr_data_msg'
443 | xmit->tdata3 = cpu_to_le(bp->tdata3);
| ^~
arch/riscv/kernel/hw_breakpoint.c:445:25: error: 'SBI_EXT_DBTR' undeclared (first use in this function)
445 | ret = sbi_ecall(SBI_EXT_DBTR, SBI_EXT_DBTR_TRIG_INSTALL,
| ^~~~~~~~~~~~
arch/riscv/kernel/hw_breakpoint.c:445:39: error: 'SBI_EXT_DBTR_TRIG_INSTALL' undeclared (first use in this function)
445 | ret = sbi_ecall(SBI_EXT_DBTR, SBI_EXT_DBTR_TRIG_INSTALL,
| ^~~~~~~~~~~~~~~~~~~~~~~~~
In file included from include/linux/byteorder/little_endian.h:5,
from arch/riscv/include/uapi/asm/byteorder.h:10,
from include/uapi/linux/perf_event.h:20,
from include/linux/perf_event.h:17:
arch/riscv/kernel/hw_breakpoint.c:454:29: error: invalid use of undefined type 'struct sbi_dbtr_id_msg'
454 | idx = le_to_cpu(recv->idx);
| ^~
include/uapi/linux/byteorder/little_endian.h:33:51: note: in definition of macro '__le64_to_cpu'
33 | #define __le64_to_cpu(x) ((__force __u64)(__le64)(x))
| ^
arch/riscv/include/asm/hw_breakpoint.h:17:19: note: in expansion of macro 'le64_to_cpu'
17 | #define le_to_cpu le64_to_cpu
| ^~~~~~~~~~~
arch/riscv/kernel/hw_breakpoint.c:454:15: note: in expansion of macro 'le_to_cpu'
454 | idx = le_to_cpu(recv->idx);
| ^~~~~~~~~
arch/riscv/kernel/hw_breakpoint.c:433:23: warning: unused variable 'ret' [-Wunused-variable]
433 | struct sbiret ret;
| ^~~
arch/riscv/kernel/hw_breakpoint.c: In function 'arch_uninstall_hw_breakpoint':
arch/riscv/kernel/hw_breakpoint.c:482:23: error: storage size of 'ret' isn't known
482 | struct sbiret ret;
| ^~~
arch/riscv/kernel/hw_breakpoint.c:499:25: error: 'SBI_EXT_DBTR' undeclared (first use in this function)
499 | ret = sbi_ecall(SBI_EXT_DBTR, SBI_EXT_DBTR_TRIG_UNINSTALL,
| ^~~~~~~~~~~~
arch/riscv/kernel/hw_breakpoint.c:499:39: error: 'SBI_EXT_DBTR_TRIG_UNINSTALL' undeclared (first use in this function)
499 | ret = sbi_ecall(SBI_EXT_DBTR, SBI_EXT_DBTR_TRIG_UNINSTALL,
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~
arch/riscv/kernel/hw_breakpoint.c:482:23: warning: unused variable 'ret' [-Wunused-variable]
482 | struct sbiret ret;
| ^~~
arch/riscv/kernel/hw_breakpoint.c: In function 'arch_enable_hw_breakpoint':
arch/riscv/kernel/hw_breakpoint.c:507:23: error: storage size of 'ret' isn't known
507 | struct sbiret ret;
| ^~~
arch/riscv/kernel/hw_breakpoint.c:523:25: error: 'SBI_EXT_DBTR' undeclared (first use in this function)
523 | ret = sbi_ecall(SBI_EXT_DBTR, SBI_EXT_DBTR_TRIG_ENABLE,
| ^~~~~~~~~~~~
arch/riscv/kernel/hw_breakpoint.c:523:39: error: 'SBI_EXT_DBTR_TRIG_ENABLE' undeclared (first use in this function)
523 | ret = sbi_ecall(SBI_EXT_DBTR, SBI_EXT_DBTR_TRIG_ENABLE,
| ^~~~~~~~~~~~~~~~~~~~~~~~
arch/riscv/kernel/hw_breakpoint.c:507:23: warning: unused variable 'ret' [-Wunused-variable]
507 | struct sbiret ret;
| ^~~
arch/riscv/kernel/hw_breakpoint.c: In function 'arch_update_hw_breakpoint':
>> include/linux/percpu-defs.h:221:59: error: invalid use of undefined type 'union sbi_dbtr_shmem_entry'
221 | const void __percpu *__vpp_verify = (typeof((ptr) + 0))NULL; \
| ^
include/linux/percpu-defs.h:245:9: note: in expansion of macro '__verify_pcpu_ptr'
245 | __verify_pcpu_ptr(ptr); \
| ^~~~~~~~~~~~~~~~~
include/linux/percpu-defs.h:256:27: note: in expansion of macro 'raw_cpu_ptr'
256 | #define this_cpu_ptr(ptr) raw_cpu_ptr(ptr)
| ^~~~~~~~~~~
arch/riscv/kernel/hw_breakpoint.c:536:45: note: in expansion of macro 'this_cpu_ptr'
536 | union sbi_dbtr_shmem_entry *shmem = this_cpu_ptr(sbi_dbtr_shmem);
| ^~~~~~~~~~~~
arch/riscv/kernel/hw_breakpoint.c:539:23: error: storage size of 'ret' isn't known
539 | struct sbiret ret;
| ^~~
arch/riscv/kernel/hw_breakpoint.c:557:22: error: invalid use of undefined type 'union sbi_dbtr_shmem_entry'
557 | xmit = &shmem->data;
| ^~
arch/riscv/kernel/hw_breakpoint.c:558:13: error: invalid use of undefined type 'struct sbi_dbtr_data_msg'
558 | xmit->tdata1 = cpu_to_le(bp->tdata1);
| ^~
arch/riscv/kernel/hw_breakpoint.c:559:13: error: invalid use of undefined type 'struct sbi_dbtr_data_msg'
559 | xmit->tdata2 = cpu_to_le(bp->tdata2);
| ^~
arch/riscv/kernel/hw_breakpoint.c:560:13: error: invalid use of undefined type 'struct sbi_dbtr_data_msg'
560 | xmit->tdata3 = cpu_to_le(bp->tdata3);
| ^~
arch/riscv/kernel/hw_breakpoint.c:562:25: error: 'SBI_EXT_DBTR' undeclared (first use in this function)
562 | ret = sbi_ecall(SBI_EXT_DBTR, SBI_EXT_DBTR_TRIG_UPDATE,
| ^~~~~~~~~~~~
arch/riscv/kernel/hw_breakpoint.c:562:39: error: 'SBI_EXT_DBTR_TRIG_UPDATE' undeclared (first use in this function)
562 | ret = sbi_ecall(SBI_EXT_DBTR, SBI_EXT_DBTR_TRIG_UPDATE,
| ^~~~~~~~~~~~~~~~~~~~~~~~
arch/riscv/kernel/hw_breakpoint.c:539:23: warning: unused variable 'ret' [-Wunused-variable]
539 | struct sbiret ret;
| ^~~
arch/riscv/kernel/hw_breakpoint.c: In function 'arch_disable_hw_breakpoint':
arch/riscv/kernel/hw_breakpoint.c:574:23: error: storage size of 'ret' isn't known
574 | struct sbiret ret;
| ^~~
arch/riscv/kernel/hw_breakpoint.c:589:25: error: 'SBI_EXT_DBTR' undeclared (first use in this function)
589 | ret = sbi_ecall(SBI_EXT_DBTR, SBI_EXT_DBTR_TRIG_DISABLE,
| ^~~~~~~~~~~~
arch/riscv/kernel/hw_breakpoint.c:589:39: error: 'SBI_EXT_DBTR_TRIG_DISABLE' undeclared (first use in this function)
589 | ret = sbi_ecall(SBI_EXT_DBTR, SBI_EXT_DBTR_TRIG_DISABLE,
| ^~~~~~~~~~~~~~~~~~~~~~~~~
arch/riscv/kernel/hw_breakpoint.c:574:23: warning: unused variable 'ret' [-Wunused-variable]
574 | struct sbiret ret;
| ^~~
arch/riscv/kernel/hw_breakpoint.c: In function 'arch_hw_breakpoint_init':
arch/riscv/kernel/hw_breakpoint.c:634:47: error: invalid application of 'sizeof' to incomplete type 'union sbi_dbtr_shmem_entry'
634 | sbi_dbtr_shmem = __alloc_percpu(sizeof(*sbi_dbtr_shmem) * dbtr_total_num,
| ^
include/linux/alloc_tag.h:251:16: note: in definition of macro 'alloc_hooks_tag'
251 | typeof(_do_alloc) _res; \
| ^~~~~~~~~
include/linux/percpu.h:142:9: note: in expansion of macro 'alloc_hooks'
142 | alloc_hooks(pcpu_alloc_noprof(_size, _align, false, GFP_KERNEL))
| ^~~~~~~~~~~
arch/riscv/kernel/hw_breakpoint.c:634:26: note: in expansion of macro '__alloc_percpu'
634 | sbi_dbtr_shmem = __alloc_percpu(sizeof(*sbi_dbtr_shmem) * dbtr_total_num,
| ^~~~~~~~~~~~~~
arch/riscv/kernel/hw_breakpoint.c:634:47: error: invalid application of 'sizeof' to incomplete type 'union sbi_dbtr_shmem_entry'
634 | sbi_dbtr_shmem = __alloc_percpu(sizeof(*sbi_dbtr_shmem) * dbtr_total_num,
| ^
include/linux/alloc_tag.h:255:24: note: in definition of macro 'alloc_hooks_tag'
255 | _res = _do_alloc; \
| ^~~~~~~~~
include/linux/percpu.h:142:9: note: in expansion of macro 'alloc_hooks'
142 | alloc_hooks(pcpu_alloc_noprof(_size, _align, false, GFP_KERNEL))
| ^~~~~~~~~~~
arch/riscv/kernel/hw_breakpoint.c:634:26: note: in expansion of macro '__alloc_percpu'
634 | sbi_dbtr_shmem = __alloc_percpu(sizeof(*sbi_dbtr_shmem) * dbtr_total_num,
| ^~~~~~~~~~~~~~
arch/riscv/kernel/hw_breakpoint.c:634:47: error: invalid application of 'sizeof' to incomplete type 'union sbi_dbtr_shmem_entry'
634 | sbi_dbtr_shmem = __alloc_percpu(sizeof(*sbi_dbtr_shmem) * dbtr_total_num,
| ^
include/linux/alloc_tag.h:258:24: note: in definition of macro 'alloc_hooks_tag'
258 | _res = _do_alloc; \
| ^~~~~~~~~
include/linux/percpu.h:142:9: note: in expansion of macro 'alloc_hooks'
142 | alloc_hooks(pcpu_alloc_noprof(_size, _align, false, GFP_KERNEL))
| ^~~~~~~~~~~
arch/riscv/kernel/hw_breakpoint.c:634:26: note: in expansion of macro '__alloc_percpu'
634 | sbi_dbtr_shmem = __alloc_percpu(sizeof(*sbi_dbtr_shmem) * dbtr_total_num,
| ^~~~~~~~~~~~~~
arch/riscv/kernel/hw_breakpoint.c:634:24: error: assignment to 'union sbi_dbtr_shmem_entry *' from 'int' makes pointer from integer without a cast [-Wint-conversion]
634 | sbi_dbtr_shmem = __alloc_percpu(sizeof(*sbi_dbtr_shmem) * dbtr_total_num,
| ^
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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