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SubjectRe: [PATCH v3] riscv: Discard vector state on syscalls
Hi Björn,

kernel test robot noticed the following build errors:

[auto build test ERROR on 488833ccdcac118da16701f4ee0673b20ba47fe3]

url: https://github.com/intel-lab-lkp/linux/commits/Bj-rn-T-pel/riscv-Discard-vector-state-on-syscalls/20230629-142852
base: 488833ccdcac118da16701f4ee0673b20ba47fe3
patch link: https://lore.kernel.org/r/20230629062730.985184-1-bjorn%40kernel.org
patch subject: [PATCH v3] riscv: Discard vector state on syscalls
config: riscv-allnoconfig (https://download.01.org/0day-ci/archive/20230629/202306292011.OGfLGBam-lkp@intel.com/config)
compiler: riscv64-linux-gcc (GCC) 12.3.0
reproduce: (https://download.01.org/0day-ci/archive/20230629/202306292011.OGfLGBam-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/202306292011.OGfLGBam-lkp@intel.com/

All errors (new ones prefixed by >>):

arch/riscv/kernel/traps.c: In function 'do_trap_ecall_u':
>> arch/riscv/kernel/traps.c:299:17: error: implicit declaration of function 'riscv_v_vstate_discard'; did you mean 'riscv_v_vstate_restore'? [-Werror=implicit-function-declaration]
299 | riscv_v_vstate_discard(regs);
| ^~~~~~~~~~~~~~~~~~~~~~
| riscv_v_vstate_restore
cc1: some warnings being treated as errors


vim +299 arch/riscv/kernel/traps.c

290
291 asmlinkage __visible __trap_section void do_trap_ecall_u(struct pt_regs *regs)
292 {
293 if (user_mode(regs)) {
294 ulong syscall = regs->a7;
295
296 regs->epc += 4;
297 regs->orig_a0 = regs->a0;
298
> 299 riscv_v_vstate_discard(regs);
300
301 syscall = syscall_enter_from_user_mode(regs, syscall);
302
303 if (syscall < NR_syscalls)
304 syscall_handler(regs, syscall);
305 else
306 regs->a0 = -ENOSYS;
307
308 syscall_exit_to_user_mode(regs);
309 } else {
310 irqentry_state_t state = irqentry_nmi_enter(regs);
311
312 do_trap_error(regs, SIGILL, ILL_ILLTRP, regs->epc,
313 "Oops - environment call from U-mode");
314
315 irqentry_nmi_exit(regs, state);
316 }
317

--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki

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