Re: futex: Fix mm reuse handling for FUT_OFF_MMSHARED

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

Hi Jann,

kernel test robot noticed the following build errors:



url:    https://github.com/intel-lab-lkp/linux/commits/Jann-Horn/futex-Fix-mm-reuse-handling-for-FUT_OFF_MMSHARED/20260929-183132
base:   
patch link:    https://lore.kernel.org/r/202609301223.w5jdpXiP-lkp%40intel.com
config: csky-randconfig-1001-20260930 (https://download.01.org/0day-ci/archive/20260930/202609301223.w5jdpXiP-lkp@intel.com/config)
compiler: csky-linux-gcc (GCC) 16.1.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260930/202609301223.w5jdpXiP-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/202609301223.w5jdpXiP-lkp@intel.com/

All errors (new ones prefixed by >>):

   csky-linux-ld: kernel/fork.o: in function `mm_init.isra.0':
>> fork.c:(.text+0x188c): undefined reference to `futex_mm_init'
>> csky-linux-ld: fork.c:(.text+0x196c): undefined reference to `futex_mm_init'
   `.exit.text' referenced in section `__jump_table' of fs/fuse/inode.o: defined in discarded section `.exit.text' of fs/fuse/inode.o
   `.exit.text' referenced in section `__jump_table' of fs/fuse/inode.o: defined in discarded section `.exit.text' of fs/fuse/inode.o
   `.exit.text' referenced in section `__jump_table' of fs/ceph/super.o: defined in discarded section `.exit.text' of fs/ceph/super.o
   `.exit.text' referenced in section `__jump_table' of fs/ceph/super.o: defined in discarded section `.exit.text' of fs/ceph/super.o
   `.exit.text' referenced in section `__jump_table' of drivers/usb/gadget/legacy/inode.o: defined in discarded section `.exit.text' of drivers/usb/gadget/legacy/inode.o
   `.exit.text' referenced in section `__jump_table' of drivers/usb/gadget/legacy/inode.o: defined in discarded section `.exit.text' of drivers/usb/gadget/legacy/inode.o
   `.exit.text' referenced in section `__jump_table' of lib/test_dynamic_debug.o: defined in discarded section `.exit.text' of lib/test_dynamic_debug.o
   `.exit.text' referenced in section `__jump_table' of lib/test_dynamic_debug.o: defined in discarded section `.exit.text' of lib/test_dynamic_debug.o
   drivers/comedi/drivers/tests/ni_routes_test.o: in function `test_ni_check_trigger_arg':
   ni_routes_test.c:(.text+0x24c2): relocation truncated to fit: R_CKCORE_PCREL_IMM16BY4 against `__jump_table'
   ni_routes_test.c:(.text+0x24c8): relocation truncated to fit: R_CKCORE_PCREL_IMM16BY4 against `__jump_table'
   drivers/comedi/drivers/tests/ni_routes_test.o: in function `test_ni_get_reg_value':
   ni_routes_test.c:(.text+0x250c): relocation truncated to fit: R_CKCORE_PCREL_IMM16BY4 against `__jump_table'
   ni_routes_test.c:(.text+0x2534): relocation truncated to fit: R_CKCORE_PCREL_IMM16BY4 against `__jump_table'
   ni_routes_test.c:(.text+0x2552): relocation truncated to fit: R_CKCORE_PCREL_IMM16BY4 against `__jump_table'
   ni_routes_test.c:(.text+0x2560): relocation truncated to fit: R_CKCORE_PCREL_IMM16BY4 against `__jump_table'
   ni_routes_test.c:(.text+0x2582): relocation truncated to fit: R_CKCORE_PCREL_IMM16BY4 against `__jump_table'
   ni_routes_test.c:(.text+0x259e): relocation truncated to fit: R_CKCORE_PCREL_IMM16BY4 against `__jump_table'
   ni_routes_test.c:(.text+0x25c0): relocation truncated to fit: R_CKCORE_PCREL_IMM16BY4 against `__jump_table'
   ni_routes_test.c:(.text+0x25dc): relocation truncated to fit: R_CKCORE_PCREL_IMM16BY4 against `__jump_table'
   ni_routes_test.c:(.text+0x25fe): additional relocation overflows omitted from the output
   csky-linux-ld: final link failed

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