[akpm-mm:mm-new 117/130] ./include/asm-generic/fixmap.h:77:9: error: implicit declaration of function '__set_fixmap'; did you mean 'set_fixmap'?

kernel test robot
2026-04-27T14:52:15Z

tree: https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-new
head: 4f7b2cc1ad8719d55a8de9675a0aca65cb17c364
commit: 93580c23bb3da5dd2926d6ae991ef04c2cdacaf2 [117/130] include/asm-generic/fixmap.h: reimplement nasty macros in C
config: powerpc64-allnoconfig-bpf (https://download.01.org/0day-ci/archive/20260427/202604271114.ebmzs1LE-lkp@intel.com/config)
compiler: powerpc64-linux-gnu-gcc (Debian 14.2.0-19) 14.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260427/202604271114.ebmzs1LE-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/r/202604271114.ebmzs1LE-lkp@intel.com/

All error/warnings (new ones prefixed by >>):

In file included from ./arch/powerpc/include/asm/fixmap.h:91,
from mm/early_ioremap.c:18:
./include/asm-generic/fixmap.h: In function '__set_fixmap_offset':
>> ./include/asm-generic/fixmap.h:77:9: error: implicit declaration of function '__set_fixmap'; did you mean 'set_fixmap'? [-Wimplicit-function-declaration]
77 | __set_fixmap(idx, phys, flags);
| ^~~~~~~~~~~~
| set_fixmap
./arch/powerpc/include/asm/fixmap.h: At top level:
>> ./arch/powerpc/include/asm/fixmap.h:93:20: warning: conflicting types for '__set_fixmap'; have 'void(enum fixed_addresses, phys_addr_t, pgprot_t)' {aka 'void(enum fixed_addresses, long long unsigned int, pgprot_t)'}
93 | static inline void __set_fixmap(enum fixed_addresses idx,
| ^~~~~~~~~~~~
>> ./arch/powerpc/include/asm/fixmap.h:93:20: error: static declaration of '__set_fixmap' follows non-static declaration
./include/asm-generic/fixmap.h:77:9: note: previous implicit declaration of '__set_fixmap' with type 'void(enum fixed_addresses, phys_addr_t, pgprot_t)' {aka 'void(enum fixed_addresses, long long unsigned int, pgprot_t)'}
77 | __set_fixmap(idx, phys, flags);
| ^~~~~~~~~~~~

vim +77 ./include/asm-generic/fixmap.h

d57c33c5daa4ef Mark Salter 2014-01-23 72
d57c33c5daa4ef Mark Salter 2014-01-23 73 /* Return a pointer with offset calculated */
93580c23bb3da5 Andrew Morton 2026-04-25 74 static inline unsigned long
93580c23bb3da5 Andrew Morton 2026-04-25 75 __set_fixmap_offset(enum fixed_addresses idx, phys_addr_t phys, pgprot_t flags)
93580c23bb3da5 Andrew Morton 2026-04-25 76 {
93580c23bb3da5 Andrew Morton 2026-04-25 @77 __set_fixmap(idx, phys, flags);
93580c23bb3da5 Andrew Morton 2026-04-25 78 return fix_to_virt(idx) + (phys & (PAGE_SIZE - 1));
93580c23bb3da5 Andrew Morton 2026-04-25 79 }
d57c33c5daa4ef Mark Salter 2014-01-23 80

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