Re: [RFC PATCH v1 2/2] randomize_kstack: Unify random source across arches

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

Hi Ryan,

[This is a private test report for your RFC patch.]
kernel test robot noticed the following build errors:

[auto build test ERROR on tip/sched/core]
[also build test ERROR on kees/for-next/hardening kees/for-next/pstore kees/for-next/kspp linus/master v6.18-rc7 next-20251128]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Ryan-Roberts/randomize_kstack-Maintain-kstack_offset-per-task/20251127-190408
base:   tip/sched/core
patch link:    https://lore.kernel.org/r/20251127105958.2427758-3-ryan.roberts%40arm.com
patch subject: [RFC PATCH v1 2/2] randomize_kstack: Unify random source across arches
config: x86_64-randconfig-161-20251130 (https://download.01.org/0day-ci/archive/20251130/202511302137.u4iIA2kf-lkp@intel.com/config)
compiler: gcc-14 (Debian 14.2.0-19) 14.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251130/202511302137.u4iIA2kf-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/202511302137.u4iIA2kf-lkp@intel.com/

All errors (new ones prefixed by >>):

>> vmlinux.o: error: objtool: do_syscall_64+0x2c: call to prandom_u32_state() leaves .noinstr.text section
>> vmlinux.o: error: objtool: __do_fast_syscall_32+0x2e: call to prandom_u32_state() leaves .noinstr.text section

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