[bcachefs:bcachefs-testing 1097/1101] fs/bcachefs/fs/check.c:113:36: error: initializer element is not a compile-time constant

[kernel test robot <lkp@intel.com>]

tree:   https://evilpiepirate.org/git/bcachefs.git bcachefs-testing
head:   e334d0d42eb60d4aae64c1d9a6374a054a0aac08
commit: 7df2fb43bb8830f27b55ca1820e397a7258e6141 [1097/1101] bcachefs: split out create_lostfound()
config: um-randconfig-002-20251208 (https://download.01.org/0day-ci/archive/20251208/202512080923.m7uVKRta-lkp@intel.com/config)
compiler: clang version 22.0.0git (https://github.com/llvm/llvm-project 9e7ce77573b2fad126a367475cbe807c10826691)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251208/202512080923.m7uVKRta-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/202512080923.m7uVKRta-lkp@intel.com/

All errors (new ones prefixed by >>):

   In file included from fs/bcachefs/fs/check.c:2:
   In file included from fs/bcachefs/bcachefs.h:202:
   In file included from include/linux/bio.h:10:
   In file included from include/linux/blk_types.h:10:
   In file included from include/linux/bvec.h:10:
   In file included from include/linux/highmem.h:12:
   In file included from include/linux/hardirq.h:11:
   In file included from arch/um/include/asm/hardirq.h:5:
   In file included from include/asm-generic/hardirq.h:17:
   In file included from include/linux/irq.h:20:
   In file included from include/linux/io.h:12:
   In file included from arch/um/include/asm/io.h:24:
   include/asm-generic/io.h:1175:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
    1175 |         return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
         |                                                   ~~~~~~~~~~ ^
>> fs/bcachefs/fs/check.c:113:36: error: initializer element is not a compile-time constant
     113 | static struct qstr lostfound_str = QSTR("lost+found");
         |                                    ^
   include/linux/dcache.h:61:17: note: expanded from macro 'QSTR'
      61 | #define QSTR(n) QSTR_LEN(n, strlen(n))
         |                 ^
   include/linux/dcache.h:60:36: note: expanded from macro 'QSTR_LEN'
      60 | #define QSTR_LEN(n,l) (struct qstr)QSTR_INIT(n,l)
         |                                    ^
   include/linux/dcache.h:59:26: note: expanded from macro 'QSTR_INIT'
      59 | #define QSTR_INIT(n,l) { { { .len = l } }, .name = n }
         |                          ^
   1 warning and 1 error generated.


vim +113 fs/bcachefs/fs/check.c

   112	
 > 113	static struct qstr lostfound_str = QSTR("lost+found");
   114	

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