tree:   https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git pending-fixes
head:   2413b547bbb10e9b0d9da0e15040d2228ef17a76
commit: 98ec2edf58c820ef953fbdfcf98d706aa804b822 [265/302] ARCv2: save ABI registers across signal handling
config: arc-randconfig-r001-20210610 (attached as .config)
compiler: arceb-elf-gcc (GCC) 9.3.0
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=98ec2edf58c820ef953fbdfcf98d706aa804b822
        git remote add linux-next https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git
        git fetch --no-tags linux-next pending-fixes
        git checkout 98ec2edf58c820ef953fbdfcf98d706aa804b822
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=arc 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>

All errors (new ones prefixed by >>):

   arch/arc/kernel/signal.c: In function 'stash_usr_regs':
>> arch/arc/kernel/signal.c:101:21: error: 'struct pt_regs' has no member named 'r30'; did you mean 'r10'?
     101 |   v2abi.r30 = regs->r30;
         |                     ^~~
         |                     r10
   arch/arc/kernel/signal.c: In function 'restore_usr_regs':
   arch/arc/kernel/signal.c:134:9: error: 'struct pt_regs' has no member named 'r30'; did you mean 'r10'?
     134 |   regs->r30 = v2abi.r30;
         |         ^~~
         |         r10
   arch/arc/kernel/signal.c: At top level:
   arch/arc/kernel/signal.c:387:6: warning: no previous prototype for 'do_signal' [-Wmissing-prototypes]
     387 | void do_signal(struct pt_regs *regs)
         |      ^~~~~~~~~
   arch/arc/kernel/signal.c:420:6: warning: no previous prototype for 'do_notify_resume' [-Wmissing-prototypes]
     420 | void do_notify_resume(struct pt_regs *regs)
         |      ^~~~~~~~~~~~~~~~


vim +101 arch/arc/kernel/signal.c

    63	
    64	static int
    65	stash_usr_regs(struct rt_sigframe __user *sf, struct pt_regs *regs,
    66		       sigset_t *set)
    67	{
    68		int err;
    69		struct user_regs_struct uregs;
    70	
    71		uregs.scratch.bta	= regs->bta;
    72		uregs.scratch.lp_start	= regs->lp_start;
    73		uregs.scratch.lp_end	= regs->lp_end;
    74		uregs.scratch.lp_count	= regs->lp_count;
    75		uregs.scratch.status32	= regs->status32;
    76		uregs.scratch.ret	= regs->ret;
    77		uregs.scratch.blink	= regs->blink;
    78		uregs.scratch.fp	= regs->fp;
    79		uregs.scratch.gp	= regs->r26;
    80		uregs.scratch.r12	= regs->r12;
    81		uregs.scratch.r11	= regs->r11;
    82		uregs.scratch.r10	= regs->r10;
    83		uregs.scratch.r9	= regs->r9;
    84		uregs.scratch.r8	= regs->r8;
    85		uregs.scratch.r7	= regs->r7;
    86		uregs.scratch.r6	= regs->r6;
    87		uregs.scratch.r5	= regs->r5;
    88		uregs.scratch.r4	= regs->r4;
    89		uregs.scratch.r3	= regs->r3;
    90		uregs.scratch.r2	= regs->r2;
    91		uregs.scratch.r1	= regs->r1;
    92		uregs.scratch.r0	= regs->r0;
    93		uregs.scratch.sp	= regs->sp;
    94	
    95		err = __copy_to_user(&(sf->uc.uc_mcontext.regs.scratch), &uregs.scratch,
    96				     sizeof(sf->uc.uc_mcontext.regs.scratch));
    97	
    98		if (is_isa_arcv2()) {
    99			struct user_regs_arcv2 v2abi;
   100	
 > 101			v2abi.r30 = regs->r30;
   102	#ifdef CONFIG_ARC_HAS_ACCL_REGS
   103			v2abi.r58 = regs->r58;
   104			v2abi.r59 = regs->r59;
   105	#else
   106			v2abi.r58 = v2abi.r59 = 0;
   107	#endif
   108			err |= __copy_to_user(&(sf->uc.uc_mcontext.v2abi), &v2abi,
   109					      sizeof(sf->uc.uc_mcontext.v2abi));
   110		}
   111	
   112		err |= __copy_to_user(&sf->uc.uc_sigmask, set, sizeof(sigset_t));
   113	
   114		return err ? -EFAULT : 0;
   115	}
   116	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org