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Tue, 08 Mar 2022 09:20:17 +0000 Date: Tue, 8 Mar 2022 17:19:30 +0800 From: kernel test robot To: Guo Ren Cc: kbuild-all@lists.01.org, GNU/Weeb Mailing List , linux-kernel@vger.kernel.org, Palmer Dabbelt , Arnd Bergmann Subject: [ammarfaizi2-block:palmer/linux/riscv-compat 20/20] arch/riscv/kernel/compat_signal.c:199:5: warning: no previous prototype for 'compat_setup_rt_frame' Message-ID: <202203081736.viunH1fl-lkp@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.10.1 (2018-07-13) Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org tree: https://github.com/ammarfaizi2/linux-block palmer/linux/riscv-compat head: ab7e33a6b819f009c3c9ccf69b2f44c1ad84a5a0 commit: ab7e33a6b819f009c3c9ccf69b2f44c1ad84a5a0 [20/20] riscv: compat: Add COMPAT Kbuild skeletal support config: riscv-allyesconfig (https://download.01.org/0day-ci/archive/20220308/202203081736.viunH1fl-lkp@intel.com/config) compiler: riscv64-linux-gcc (GCC) 11.2.0 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://github.com/ammarfaizi2/linux-block/commit/ab7e33a6b819f009c3c9ccf69b2f44c1ad84a5a0 git remote add ammarfaizi2-block https://github.com/ammarfaizi2/linux-block git fetch --no-tags ammarfaizi2-block palmer/linux/riscv-compat git checkout ab7e33a6b819f009c3c9ccf69b2f44c1ad84a5a0 # save the config file to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross O=build_dir ARCH=riscv SHELL=/bin/bash arch/riscv/kernel/ arch/riscv/mm/ If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot All warnings (new ones prefixed by >>): >> arch/riscv/kernel/compat_signal.c:199:5: warning: no previous prototype for 'compat_setup_rt_frame' [-Wmissing-prototypes] 199 | int compat_setup_rt_frame(struct ksignal *ksig, sigset_t *set, | ^~~~~~~~~~~~~~~~~~~~~ vim +/compat_setup_rt_frame +199 arch/riscv/kernel/compat_signal.c 7fbcda00016ec9 Guo Ren 2022-02-28 198 7fbcda00016ec9 Guo Ren 2022-02-28 @199 int compat_setup_rt_frame(struct ksignal *ksig, sigset_t *set, 7fbcda00016ec9 Guo Ren 2022-02-28 200 struct pt_regs *regs) 7fbcda00016ec9 Guo Ren 2022-02-28 201 { 7fbcda00016ec9 Guo Ren 2022-02-28 202 struct compat_rt_sigframe __user *frame; 7fbcda00016ec9 Guo Ren 2022-02-28 203 long err = 0; 7fbcda00016ec9 Guo Ren 2022-02-28 204 7fbcda00016ec9 Guo Ren 2022-02-28 205 frame = compat_get_sigframe(ksig, regs, sizeof(*frame)); 7fbcda00016ec9 Guo Ren 2022-02-28 206 if (!access_ok(frame, sizeof(*frame))) 7fbcda00016ec9 Guo Ren 2022-02-28 207 return -EFAULT; 7fbcda00016ec9 Guo Ren 2022-02-28 208 7fbcda00016ec9 Guo Ren 2022-02-28 209 err |= copy_siginfo_to_user32(&frame->info, &ksig->info); 7fbcda00016ec9 Guo Ren 2022-02-28 210 7fbcda00016ec9 Guo Ren 2022-02-28 211 /* Create the ucontext. */ 7fbcda00016ec9 Guo Ren 2022-02-28 212 err |= __put_user(0, &frame->uc.uc_flags); 7fbcda00016ec9 Guo Ren 2022-02-28 213 err |= __put_user(NULL, &frame->uc.uc_link); 7fbcda00016ec9 Guo Ren 2022-02-28 214 err |= __compat_save_altstack(&frame->uc.uc_stack, regs->sp); 7fbcda00016ec9 Guo Ren 2022-02-28 215 err |= compat_setup_sigcontext(frame, regs); 7fbcda00016ec9 Guo Ren 2022-02-28 216 err |= __copy_to_user(&frame->uc.uc_sigmask, set, sizeof(*set)); 7fbcda00016ec9 Guo Ren 2022-02-28 217 if (err) 7fbcda00016ec9 Guo Ren 2022-02-28 218 return -EFAULT; 7fbcda00016ec9 Guo Ren 2022-02-28 219 7fbcda00016ec9 Guo Ren 2022-02-28 220 regs->ra = (unsigned long)COMPAT_VDSO_SYMBOL( 7fbcda00016ec9 Guo Ren 2022-02-28 221 current->mm->context.vdso, rt_sigreturn); 7fbcda00016ec9 Guo Ren 2022-02-28 222 7fbcda00016ec9 Guo Ren 2022-02-28 223 /* 7fbcda00016ec9 Guo Ren 2022-02-28 224 * Set up registers for signal handler. 7fbcda00016ec9 Guo Ren 2022-02-28 225 * Registers that we don't modify keep the value they had from 7fbcda00016ec9 Guo Ren 2022-02-28 226 * user-space at the time we took the signal. 7fbcda00016ec9 Guo Ren 2022-02-28 227 * We always pass siginfo and mcontext, regardless of SA_SIGINFO, 7fbcda00016ec9 Guo Ren 2022-02-28 228 * since some things rely on this (e.g. glibc's debug/segfault.c). 7fbcda00016ec9 Guo Ren 2022-02-28 229 */ 7fbcda00016ec9 Guo Ren 2022-02-28 230 regs->epc = (unsigned long)ksig->ka.sa.sa_handler; 7fbcda00016ec9 Guo Ren 2022-02-28 231 regs->sp = (unsigned long)frame; 7fbcda00016ec9 Guo Ren 2022-02-28 232 regs->a0 = ksig->sig; /* a0: signal number */ 7fbcda00016ec9 Guo Ren 2022-02-28 233 regs->a1 = (unsigned long)(&frame->info); /* a1: siginfo pointer */ 7fbcda00016ec9 Guo Ren 2022-02-28 234 regs->a2 = (unsigned long)(&frame->uc); /* a2: ucontext pointer */ 7fbcda00016ec9 Guo Ren 2022-02-28 235 :::::: The code at line 199 was first introduced by commit :::::: 7fbcda00016ec95ced8262fb949bead0549c9727 riscv: compat: signal: Add rt_frame implementation :::::: TO: Guo Ren :::::: CC: Palmer Dabbelt --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org