[tglx-devel:timers/cleanup 47/59] drivers/firmware/efi/libstub/loongarch.c:33:21: error: call to undeclared function 'random_get_entropy'; ISO C99 and later do not support implicit function declarations

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/tglx/devel.git timers/cleanup
head:   0ad363c8e014568032d53fe2c7ab288de68373f4
commit: 57c8b40ef1bde63f63d6983319dde6d1626a3537 [47/59] loongarch: Select ARCH_HAS_RANDOM_ENTROPY
config: loongarch-defconfig (https://download.01.org/0day-ci/archive/20260713/[email protected]/config)
compiler: clang version 23.0.0git (https://github.com/llvm/llvm-project b3e6e6dabdc02153552a64fc74ff5c7532447eed)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260713/[email protected]/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 <[email protected]>
| Closes: https://lore.kernel.org/oe-kbuild-all/[email protected]/

All errors (new ones prefixed by >>):

>> drivers/firmware/efi/libstub/loongarch.c:33:21: error: call to undeclared function 'random_get_entropy'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
      33 |                 random_offset ^= (random_get_entropy() << 16);
         |                                   ^
   1 error generated.


vim +/random_get_entropy +33 drivers/firmware/efi/libstub/loongarch.c

ad6f4f3ea72f86 WANG Rui 2026-04-27  25  
03d8273542146f WANG Rui 2026-05-21  26  unsigned long efi_get_kimg_kaslr_address(void)
03d8273542146f WANG Rui 2026-05-21  27  {
03d8273542146f WANG Rui 2026-05-21  28  	unsigned int random_offset = 0;
03d8273542146f WANG Rui 2026-05-21  29  
03d8273542146f WANG Rui 2026-05-21  30  #ifdef CONFIG_RANDOMIZE_BASE
03d8273542146f WANG Rui 2026-05-21  31  	if (!efi_nokaslr) {
03d8273542146f WANG Rui 2026-05-21  32  		efi_get_random_bytes(sizeof(random_offset), (u8 *)&random_offset);
03d8273542146f WANG Rui 2026-05-21 @33  		random_offset ^= (random_get_entropy() << 16);
03d8273542146f WANG Rui 2026-05-21  34  		random_offset &= (CONFIG_RANDOMIZE_BASE_MAX_OFFSET - 1);
03d8273542146f WANG Rui 2026-05-21  35  		random_offset = ALIGN(random_offset + SZ_64K, SZ_64K);
03d8273542146f WANG Rui 2026-05-21  36  	}
03d8273542146f WANG Rui 2026-05-21  37  #endif
03d8273542146f WANG Rui 2026-05-21  38  
03d8273542146f WANG Rui 2026-05-21  39  	return PHYSADDR(VMLINUX_LOAD_ADDRESS) + random_offset;
03d8273542146f WANG Rui 2026-05-21  40  }
03d8273542146f WANG Rui 2026-05-21  41  

:::::: The code at line 33 was first introduced by commit
:::::: 03d8273542146f228c0019f08b57545fdee79704 efi/loongarch: Randomize kernel preferred address for KASLR

:::::: TO: WANG Rui <[email protected]>
:::::: CC: Huacai Chen <[email protected]>

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