From: kernel test robot <lkp@intel.com>
To: Zong Li <zong.li@sifive.com>
Cc: llvm@lists.linux.dev, oe-kbuild-all@lists.linux.dev,
Anup Patel <anup@brainfault.org>,
Andrew Jones <ajones@ventanamicro.com>,
Nutty Liu <nutty.liu@hotmail.com>
Subject: [avpatel:riscv_iommu_irqbypass_v2 4/18] drivers/iommu/riscv/iommu.c:1198:39: error: call to undeclared function 'virt_to_pfn'; ISO C99 and later do not support implicit function declarations
Date: Thu, 30 Apr 2026 18:17:00 +0800 [thread overview]
Message-ID: <202604301838.BsgW9ygi-lkp@intel.com> (raw)
tree: https://github.com/avpatel/linux.git riscv_iommu_irqbypass_v2
head: 0ba166d111b762ae8f37075ba1266e345ae5ef59
commit: 495fff405c515405e7c816985699bc45338d297d [4/18] iommu/riscv: Use data structure instead of individual values
config: um-allmodconfig (https://download.01.org/0day-ci/archive/20260430/202604301838.BsgW9ygi-lkp@intel.com/config)
compiler: clang version 19.1.7 (https://github.com/llvm/llvm-project cd708029e0b2869e80abe31ddb175f7c35361f90)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260430/202604301838.BsgW9ygi-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/202604301838.BsgW9ygi-lkp@intel.com/
All errors (new ones prefixed by >>):
In file included from drivers/iommu/riscv/iommu.c:18:
In file included from include/linux/crash_dump.h:5:
In file included from include/linux/kexec.h:20:
In file included from arch/um/include/asm/io.h:24:
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;
| ~~~~~~~~~~ ^
drivers/iommu/riscv/iommu.c:1197:55: error: no member named 'pgd_mode' in 'struct riscv_iommu_domain'
1197 | dc.fsc = FIELD_PREP(RISCV_IOMMU_PC_FSC_MODE, domain->pgd_mode) |
| ~~~~~~ ^
include/linux/bitfield.h:138:23: note: expanded from macro 'FIELD_PREP'
138 | __FIELD_PREP(_mask, _val, "FIELD_PREP: "); \
| ^~~~
include/linux/bitfield.h:91:31: note: expanded from macro '__FIELD_PREP'
91 | __BF_FIELD_CHECK_MASK(mask, val, pfx); \
| ^~~
include/linux/bitfield.h:70:41: note: expanded from macro '__BF_FIELD_CHECK_MASK'
70 | BUILD_BUG_ON_MSG(__builtin_constant_p(_val) ? \
| ^~~~
note: (skipping 1 expansions in backtrace; use -fmacro-backtrace-limit=0 to see all)
include/linux/compiler_types.h:699:22: note: expanded from macro 'compiletime_assert'
699 | _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
| ^~~~~~~~~
include/linux/compiler_types.h:687:23: note: expanded from macro '_compiletime_assert'
687 | __compiletime_assert(condition, msg, prefix, suffix)
| ^~~~~~~~~
include/linux/compiler_types.h:679:9: note: expanded from macro '__compiletime_assert'
679 | if (!(condition)) \
| ^~~~~~~~~
drivers/iommu/riscv/iommu.c:1197:55: error: no member named 'pgd_mode' in 'struct riscv_iommu_domain'
1197 | dc.fsc = FIELD_PREP(RISCV_IOMMU_PC_FSC_MODE, domain->pgd_mode) |
| ~~~~~~ ^
include/linux/bitfield.h:138:23: note: expanded from macro 'FIELD_PREP'
138 | __FIELD_PREP(_mask, _val, "FIELD_PREP: "); \
| ^~~~
include/linux/bitfield.h:91:31: note: expanded from macro '__FIELD_PREP'
91 | __BF_FIELD_CHECK_MASK(mask, val, pfx); \
| ^~~
include/linux/bitfield.h:72:12: note: expanded from macro '__BF_FIELD_CHECK_MASK'
72 | (0 + (_val)) : 0, \
| ^~~~
note: (skipping 1 expansions in backtrace; use -fmacro-backtrace-limit=0 to see all)
include/linux/compiler_types.h:699:22: note: expanded from macro 'compiletime_assert'
699 | _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
| ^~~~~~~~~
include/linux/compiler_types.h:687:23: note: expanded from macro '_compiletime_assert'
687 | __compiletime_assert(condition, msg, prefix, suffix)
| ^~~~~~~~~
include/linux/compiler_types.h:679:9: note: expanded from macro '__compiletime_assert'
679 | if (!(condition)) \
| ^~~~~~~~~
drivers/iommu/riscv/iommu.c:1197:55: error: no member named 'pgd_mode' in 'struct riscv_iommu_domain'
1197 | dc.fsc = FIELD_PREP(RISCV_IOMMU_PC_FSC_MODE, domain->pgd_mode) |
| ~~~~~~ ^
include/linux/bitfield.h:138:23: note: expanded from macro 'FIELD_PREP'
138 | __FIELD_PREP(_mask, _val, "FIELD_PREP: "); \
| ^~~~
include/linux/bitfield.h:92:19: note: expanded from macro '__FIELD_PREP'
92 | ((typeof(mask))(val) << __bf_shf(mask)) & (mask); \
| ^~~
>> drivers/iommu/riscv/iommu.c:1198:39: error: call to undeclared function 'virt_to_pfn'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
1198 | FIELD_PREP(RISCV_IOMMU_PC_FSC_PPN, virt_to_pfn(domain->pgd_root));
| ^
drivers/iommu/riscv/iommu.c:1198:39: note: did you mean 'virt_to_pte'?
arch/um/include/asm/pgtable.h:284:15: note: 'virt_to_pte' declared here
284 | extern pte_t *virt_to_pte(struct mm_struct *mm, unsigned long addr);
| ^
drivers/iommu/riscv/iommu.c:1198:59: error: no member named 'pgd_root' in 'struct riscv_iommu_domain'
1198 | FIELD_PREP(RISCV_IOMMU_PC_FSC_PPN, virt_to_pfn(domain->pgd_root));
| ~~~~~~ ^
include/linux/bitfield.h:138:23: note: expanded from macro 'FIELD_PREP'
138 | __FIELD_PREP(_mask, _val, "FIELD_PREP: "); \
| ^~~~
include/linux/bitfield.h:91:31: note: expanded from macro '__FIELD_PREP'
91 | __BF_FIELD_CHECK_MASK(mask, val, pfx); \
| ^~~
include/linux/bitfield.h:70:41: note: expanded from macro '__BF_FIELD_CHECK_MASK'
70 | BUILD_BUG_ON_MSG(__builtin_constant_p(_val) ? \
| ^~~~
note: (skipping 1 expansions in backtrace; use -fmacro-backtrace-limit=0 to see all)
include/linux/compiler_types.h:699:22: note: expanded from macro 'compiletime_assert'
699 | _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
| ^~~~~~~~~
include/linux/compiler_types.h:687:23: note: expanded from macro '_compiletime_assert'
687 | __compiletime_assert(condition, msg, prefix, suffix)
| ^~~~~~~~~
include/linux/compiler_types.h:679:9: note: expanded from macro '__compiletime_assert'
679 | if (!(condition)) \
| ^~~~~~~~~
drivers/iommu/riscv/iommu.c:1198:59: error: no member named 'pgd_root' in 'struct riscv_iommu_domain'
1198 | FIELD_PREP(RISCV_IOMMU_PC_FSC_PPN, virt_to_pfn(domain->pgd_root));
| ~~~~~~ ^
include/linux/bitfield.h:138:23: note: expanded from macro 'FIELD_PREP'
138 | __FIELD_PREP(_mask, _val, "FIELD_PREP: "); \
| ^~~~
include/linux/bitfield.h:91:31: note: expanded from macro '__FIELD_PREP'
91 | __BF_FIELD_CHECK_MASK(mask, val, pfx); \
| ^~~
include/linux/bitfield.h:72:12: note: expanded from macro '__BF_FIELD_CHECK_MASK'
72 | (0 + (_val)) : 0, \
| ^~~~
note: (skipping 1 expansions in backtrace; use -fmacro-backtrace-limit=0 to see all)
include/linux/compiler_types.h:699:22: note: expanded from macro 'compiletime_assert'
699 | _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
| ^~~~~~~~~
include/linux/compiler_types.h:687:23: note: expanded from macro '_compiletime_assert'
687 | __compiletime_assert(condition, msg, prefix, suffix)
| ^~~~~~~~~
include/linux/compiler_types.h:679:9: note: expanded from macro '__compiletime_assert'
679 | if (!(condition)) \
| ^~~~~~~~~
>> drivers/iommu/riscv/iommu.c:1198:39: error: call to undeclared function 'virt_to_pfn'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
1198 | FIELD_PREP(RISCV_IOMMU_PC_FSC_PPN, virt_to_pfn(domain->pgd_root));
| ^
drivers/iommu/riscv/iommu.c:1198:59: error: no member named 'pgd_root' in 'struct riscv_iommu_domain'
1198 | FIELD_PREP(RISCV_IOMMU_PC_FSC_PPN, virt_to_pfn(domain->pgd_root));
| ~~~~~~ ^
include/linux/bitfield.h:138:23: note: expanded from macro 'FIELD_PREP'
138 | __FIELD_PREP(_mask, _val, "FIELD_PREP: "); \
| ^~~~
include/linux/bitfield.h:92:19: note: expanded from macro '__FIELD_PREP'
92 | ((typeof(mask))(val) << __bf_shf(mask)) & (mask); \
| ^~~
1 warning and 8 errors generated.
vim +/virt_to_pfn +1198 drivers/iommu/riscv/iommu.c
1181
1182 static int riscv_iommu_attach_paging_domain(struct iommu_domain *iommu_domain,
1183 struct device *dev,
1184 struct iommu_domain *old)
1185 {
1186 struct riscv_iommu_domain *domain = iommu_domain_to_riscv(iommu_domain);
1187 struct riscv_iommu_device *iommu = dev_to_iommu(dev);
1188 struct riscv_iommu_info *info = dev_iommu_priv_get(dev);
1189 struct pt_iommu_riscv_64_hw_info pt_info;
1190 struct riscv_iommu_dc dc = {0};
1191
1192 pt_iommu_riscv_64_hw_info(&domain->riscvpt, &pt_info);
1193
1194 if (!riscv_iommu_pt_supported(iommu, pt_info.fsc_iosatp_mode))
1195 return -ENODEV;
1196
1197 dc.fsc = FIELD_PREP(RISCV_IOMMU_PC_FSC_MODE, domain->pgd_mode) |
> 1198 FIELD_PREP(RISCV_IOMMU_PC_FSC_PPN, virt_to_pfn(domain->pgd_root));
1199 dc.ta = FIELD_PREP(RISCV_IOMMU_PC_TA_PSCID, domain->pscid) |
1200 RISCV_IOMMU_PC_TA_V;
1201
1202 if (riscv_iommu_bond_link(domain, dev))
1203 return -ENOMEM;
1204
1205 riscv_iommu_iodir_update(iommu, dev, &dc);
1206 riscv_iommu_bond_unlink(info->domain, dev);
1207 info->domain = domain;
1208
1209 return 0;
1210 }
1211
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
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