[kbuild-all] arch/parisc/kernel/sys_parisc.c:415:17: warning: no previous prototype for 'parisc_compat_signalfd4'

tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 8ac91e6c6033ebc12c5c1e4aa171b81a662bd70f commit: 44a4c9e443674e6cd3368d3e642dfe9c429d5525 parisc: Add wrapper syscalls to fix O_NONBLOCK flag usage date: 7 months ago config: parisc-randconfig-r001-20210519 (attached as .config) compiler: hppa64-linux-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/torvalds/linux.git/commit... git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git git fetch --no-tags linus master git checkout 44a4c9e443674e6cd3368d3e642dfe9c429d5525 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=parisc If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>): arch/parisc/kernel/sys_parisc.c:228:15: warning: no previous prototype for 'arch_mmap_rnd' [-Wmissing-prototypes] 228 | unsigned long arch_mmap_rnd(void) | ^~~~~~~~~~~~~ arch/parisc/kernel/sys_parisc.c:256:26: warning: no previous prototype for 'sys_mmap2' [-Wmissing-prototypes] 256 | asmlinkage unsigned long sys_mmap2(unsigned long addr, unsigned long len, | ^~~~~~~~~ arch/parisc/kernel/sys_parisc.c:266:26: warning: no previous prototype for 'sys_mmap' [-Wmissing-prototypes] 266 | asmlinkage unsigned long sys_mmap(unsigned long addr, unsigned long len, | ^~~~~~~~ arch/parisc/kernel/sys_parisc.c:281:17: warning: no previous prototype for 'parisc_truncate64' [-Wmissing-prototypes] 281 | asmlinkage long parisc_truncate64(const char __user * path, | ^~~~~~~~~~~~~~~~~ arch/parisc/kernel/sys_parisc.c:287:17: warning: no previous prototype for 'parisc_ftruncate64' [-Wmissing-prototypes] 287 | asmlinkage long parisc_ftruncate64(unsigned int fd, | ^~~~~~~~~~~~~~~~~~ arch/parisc/kernel/sys_parisc.c:295:17: warning: no previous prototype for 'sys_truncate64' [-Wmissing-prototypes] 295 | asmlinkage long sys_truncate64(const char __user * path, unsigned long length) | ^~~~~~~~~~~~~~ arch/parisc/kernel/sys_parisc.c:299:17: warning: no previous prototype for 'sys_ftruncate64' [-Wmissing-prototypes] 299 | asmlinkage long sys_ftruncate64(unsigned int fd, unsigned long length) | ^~~~~~~~~~~~~~~ arch/parisc/kernel/sys_parisc.c:303:17: warning: no previous prototype for 'sys_fcntl64' [-Wmissing-prototypes] 303 | asmlinkage long sys_fcntl64(unsigned int fd, unsigned int cmd, unsigned long arg) | ^~~~~~~~~~~ arch/parisc/kernel/sys_parisc.c:322:20: warning: no previous prototype for 'parisc_pread64' [-Wmissing-prototypes] 322 | asmlinkage ssize_t parisc_pread64(unsigned int fd, char __user *buf, size_t count, | ^~~~~~~~~~~~~~ arch/parisc/kernel/sys_parisc.c:328:20: warning: no previous prototype for 'parisc_pwrite64' [-Wmissing-prototypes] 328 | asmlinkage ssize_t parisc_pwrite64(unsigned int fd, const char __user *buf, | ^~~~~~~~~~~~~~~ arch/parisc/kernel/sys_parisc.c:334:20: warning: no previous prototype for 'parisc_readahead' [-Wmissing-prototypes] 334 | asmlinkage ssize_t parisc_readahead(int fd, unsigned int high, unsigned int low, | ^~~~~~~~~~~~~~~~ arch/parisc/kernel/sys_parisc.c:340:17: warning: no previous prototype for 'parisc_fadvise64_64' [-Wmissing-prototypes] 340 | asmlinkage long parisc_fadvise64_64(int fd, | ^~~~~~~~~~~~~~~~~~~ arch/parisc/kernel/sys_parisc.c:348:17: warning: no previous prototype for 'parisc_sync_file_range' [-Wmissing-prototypes] 348 | asmlinkage long parisc_sync_file_range(int fd, | ^~~~~~~~~~~~~~~~~~~~~~ arch/parisc/kernel/sys_parisc.c:356:17: warning: no previous prototype for 'parisc_fallocate' [-Wmissing-prototypes] 356 | asmlinkage long parisc_fallocate(int fd, int mode, u32 offhi, u32 offlo, | ^~~~~~~~~~~~~~~~ arch/parisc/kernel/sys_parisc.c:363:6: warning: no previous prototype for 'parisc_personality' [-Wmissing-prototypes] 363 | long parisc_personality(unsigned long personality) | ^~~~~~~~~~~~~~~~~~ arch/parisc/kernel/sys_parisc.c:401:17: warning: no previous prototype for 'parisc_timerfd_create' [-Wmissing-prototypes] 401 | asmlinkage long parisc_timerfd_create(int clockid, int flags) | ^~~~~~~~~~~~~~~~~~~~~ arch/parisc/kernel/sys_parisc.c:407:17: warning: no previous prototype for 'parisc_signalfd4' [-Wmissing-prototypes] 407 | asmlinkage long parisc_signalfd4(int ufd, sigset_t __user *user_mask, | ^~~~~~~~~~~~~~~~ 415 | asmlinkage long parisc_compat_signalfd4(int ufd, | ^~~~~~~~~~~~~~~~~~~~~~~ arch/parisc/kernel/sys_parisc.c:424:17: warning: no previous prototype for 'parisc_eventfd2' [-Wmissing-prototypes] 424 | asmlinkage long parisc_eventfd2(unsigned int count, int flags) | ^~~~~~~~~~~~~~~ arch/parisc/kernel/sys_parisc.c:430:17: warning: no previous prototype for 'parisc_userfaultfd' [-Wmissing-prototypes] 430 | asmlinkage long parisc_userfaultfd(int flags) | ^~~~~~~~~~~~~~~~~~ arch/parisc/kernel/sys_parisc.c:436:17: warning: no previous prototype for 'parisc_pipe2' [-Wmissing-prototypes] 436 | asmlinkage long parisc_pipe2(int __user *fildes, int flags) | ^~~~~~~~~~~~ arch/parisc/kernel/sys_parisc.c:442:17: warning: no previous prototype for 'parisc_inotify_init1' [-Wmissing-prototypes] 442 | asmlinkage long parisc_inotify_init1(int flags) | ^~~~~~~~~~~~~~~~~~~~ vim +/parisc_compat_signalfd4 +415 arch/parisc/kernel/sys_parisc.c 362 364 { 365 long err; 366 367 if (personality(current->personality) == PER_LINUX32 368 && personality(personality) == PER_LINUX) 369 personality = (personality & ~PER_MASK) | PER_LINUX32; 370 371 err = sys_personality(personality); 372 if (personality(err) == PER_LINUX32) 373 err = (err & ~PER_MASK) | PER_LINUX; 374 375 return err; 376 } 377 378 /* 379 * Up to kernel v5.9 we defined O_NONBLOCK as 000200004, 380 * since then O_NONBLOCK is defined as 000200000. 381 * 382 * The following wrapper functions mask out the old 383 * O_NDELAY bit from calls which use O_NONBLOCK. 384 * 385 * XXX: Remove those in year 2022 (or later)? 386 */ 387 388 #define O_NONBLOCK_OLD 000200004 389 #define O_NONBLOCK_MASK_OUT (O_NONBLOCK_OLD & ~O_NONBLOCK) 390 391 static int FIX_O_NONBLOCK(int flags) 392 { 393 if (flags & O_NONBLOCK_MASK_OUT) { 394 struct task_struct *tsk = current; 395 pr_warn_once("%s(%d) uses a deprecated O_NONBLOCK value.\n", 396 tsk->comm, tsk->pid); 397 } 398 return flags & ~O_NONBLOCK_MASK_OUT; 399 } 400 401 asmlinkage long parisc_timerfd_create(int clockid, int flags) 402 { 403 flags = FIX_O_NONBLOCK(flags); 404 return sys_timerfd_create(clockid, flags); 405 } 406 407 asmlinkage long parisc_signalfd4(int ufd, sigset_t __user *user_mask, 408 size_t sizemask, int flags) 409 { 410 flags = FIX_O_NONBLOCK(flags); 411 return sys_signalfd4(ufd, user_mask, sizemask, flags); 412 } 413 414 #ifdef CONFIG_COMPAT 416 compat_sigset_t __user *user_mask, 417 compat_size_t sizemask, int flags) 418 { 419 flags = FIX_O_NONBLOCK(flags); 420 return compat_sys_signalfd4(ufd, user_mask, sizemask, flags); 421 } 422 #endif 423 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org