Re: [tglx-devel:rseq/perf 17/47] drivers/hv/mshv_root_main.c:588:2: error: call to undeclared function 'rseq_virt_userspace_exit'; ISO C99 and later do not support implicit function declarations

[Thomas Gleixner <tglx@linutronix.de>]

On Sun, Aug 24 2025 at 10:25, kernel test robot wrote:
> tree:   https://git.kernel.org/pub/scm/linux/kernel/git/tglx/devel.git rseq/perf
> head:   eb43860d07d75ca9e20e5716da7f8dddee478ed9
> commit: 0de985a3d3f07cb83e1bb418183c75579c3fd912 [17/47] rseq, virt: Retrigger RSEQ after vcpu_run()
> config: x86_64-randconfig-161-20250824 (https://download.01.org/0day-ci/archive/20250824/202508241053.wbAfNuDn-lkp@intel.com/config)
> compiler: clang version 20.1.8 (https://github.com/llvm/llvm-project 87f0227cb60147a26a1eeb4fb06e3b505e9c7261)
> reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250824/202508241053.wbAfNuDn-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/202508241053.wbAfNuDn-lkp@intel.com/
>
> All errors (new ones prefixed by >>):
>
>>> drivers/hv/mshv_root_main.c:588:2: error: call to undeclared function 'rseq_virt_userspace_exit'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
>      588 |         rseq_virt_userspace_exit();
>          |         ^

Bah. lacks an include...