* [akpm-mm:mm-new 117/130] include/asm-generic/fixmap.h:77:2: error: call to undeclared function '__set_fixmap'; ISO C99 and later do not support implicit function declarations
@ 2026-04-29 22:39 kernel test robot
0 siblings, 0 replies; only message in thread
From: kernel test robot @ 2026-04-29 22:39 UTC (permalink / raw)
To: Andrew Morton
Cc: llvm, oe-kbuild-all, David Hildenbrand,
Linux Memory Management List, mm-commits, Davidlohr Bueso
tree: https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-new
head: 0587fb0c820d86e5b77a975680d79b5176d09abb
commit: 93580c23bb3da5dd2926d6ae991ef04c2cdacaf2 [117/130] include/asm-generic/fixmap.h: reimplement nasty macros in C
config: mips-xway_defconfig (https://download.01.org/0day-ci/archive/20260430/202604300638.A3yVzhM3-lkp@intel.com/config)
compiler: clang version 23.0.0git (https://github.com/llvm/llvm-project 5bac06718f502014fade905512f1d26d578a18f3)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260430/202604300638.A3yVzhM3-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/202604300638.A3yVzhM3-lkp@intel.com/
All errors (new ones prefixed by >>):
In file included from arch/mips/kernel/asm-offsets.c:17:
In file included from include/linux/mm.h:31:
In file included from include/linux/pgtable.h:6:
In file included from arch/mips/include/asm/pgtable.h:14:
In file included from arch/mips/include/asm/pgtable-32.h:17:
In file included from arch/mips/include/asm/fixmap.h:70:
>> include/asm-generic/fixmap.h:77:2: error: call to undeclared function '__set_fixmap'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
77 | __set_fixmap(idx, phys, flags);
| ^
>> include/asm-generic/fixmap.h:84:40: error: use of undeclared identifier 'PAGE_KERNEL'
84 | return __set_fixmap_offset(idx, phys, FIXMAP_PAGE_NORMAL);
| ^~~~~~~~~~~~~~~~~~
include/asm-generic/fixmap.h:48:28: note: expanded from macro 'FIXMAP_PAGE_NORMAL'
48 | #define FIXMAP_PAGE_NORMAL PAGE_KERNEL
| ^~~~~~~~~~~
include/asm-generic/fixmap.h:93:2: error: call to undeclared function '__set_fixmap'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
93 | __set_fixmap(idx, phys, FIXMAP_PAGE_NOCACHE);
| ^
include/asm-generic/fixmap.h:93:26: error: use of undeclared identifier 'PAGE_KERNEL_NOCACHE'
93 | __set_fixmap(idx, phys, FIXMAP_PAGE_NOCACHE);
| ^~~~~~~~~~~~~~~~~~~
include/asm-generic/fixmap.h:54:29: note: expanded from macro 'FIXMAP_PAGE_NOCACHE'
54 | #define FIXMAP_PAGE_NOCACHE PAGE_KERNEL_NOCACHE
| ^~~~~~~~~~~~~~~~~~~
include/asm-generic/fixmap.h:99:33: error: use of undeclared identifier 'PAGE_KERNEL_NOCACHE'
99 | __set_fixmap_offset(idx, phys, FIXMAP_PAGE_NOCACHE);
| ^~~~~~~~~~~~~~~~~~~
include/asm-generic/fixmap.h:54:29: note: expanded from macro 'FIXMAP_PAGE_NOCACHE'
54 | #define FIXMAP_PAGE_NOCACHE PAGE_KERNEL_NOCACHE
| ^~~~~~~~~~~~~~~~~~~
In file included from arch/mips/kernel/asm-offsets.c:26:
In file included from include/linux/kvm_host.h:5:
In file included from include/linux/entry-virt.h:7:
In file included from include/linux/syscalls.h:95:
In file included from include/trace/syscall.h:7:
In file included from include/linux/trace_events.h:6:
In file included from include/linux/ring_buffer.h:7:
include/linux/poll.h:134:27: warning: division by zero is undefined [-Wdivision-by-zero]
134 | M(RDNORM) | M(RDBAND) | M(WRNORM) | M(WRBAND) |
| ^~~~~~~~~
include/linux/poll.h:132:32: note: expanded from macro 'M'
132 | #define M(X) (__force __poll_t)__MAP(val, POLL##X, (__force __u16)EPOLL##X)
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/poll.h:118:51: note: expanded from macro '__MAP'
118 | (from < to ? (v & from) * (to/from) : (v & from) / (from/to))
| ^ ~~~~~~~~~
include/linux/poll.h:134:39: warning: division by zero is undefined [-Wdivision-by-zero]
134 | M(RDNORM) | M(RDBAND) | M(WRNORM) | M(WRBAND) |
| ^~~~~~~~~
include/linux/poll.h:132:32: note: expanded from macro 'M'
132 | #define M(X) (__force __poll_t)__MAP(val, POLL##X, (__force __u16)EPOLL##X)
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/poll.h:118:51: note: expanded from macro '__MAP'
118 | (from < to ? (v & from) * (to/from) : (v & from) / (from/to))
| ^ ~~~~~~~~~
2 warnings and 5 errors generated.
make[3]: *** [scripts/Makefile.build:184: arch/mips/kernel/asm-offsets.s] Error 1
make[3]: Target 'prepare' not remade because of errors.
make[2]: *** [Makefile:1371: prepare0] Error 2
make[2]: Target 'prepare' not remade because of errors.
make[1]: *** [Makefile:248: __sub-make] Error 2
make[1]: Target 'prepare' not remade because of errors.
make: *** [Makefile:248: __sub-make] Error 2
make: Target 'prepare' not remade because of errors.
vim +/__set_fixmap +77 include/asm-generic/fixmap.h
72
73 /* Return a pointer with offset calculated */
74 static inline unsigned long
75 __set_fixmap_offset(enum fixed_addresses idx, phys_addr_t phys, pgprot_t flags)
76 {
> 77 __set_fixmap(idx, phys, flags);
78 return fix_to_virt(idx) + (phys & (PAGE_SIZE - 1));
79 }
80
81 static inline unsigned long
82 set_fixmap_offset(enum fixed_addresses idx, phys_addr_t phys)
83 {
> 84 return __set_fixmap_offset(idx, phys, FIXMAP_PAGE_NORMAL);
85 }
86
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
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