* [linux-next:master 4125/4677] arch/s390/kernel/signal.c:464:6: warning: no previous prototype for function 'arch_do_signal_or_restart'
@ 2021-01-20 17:44 ` kernel test robot
0 siblings, 0 replies; 2+ messages in thread
From: kernel test robot @ 2021-01-20 17:44 UTC (permalink / raw)
To: Sven Schnelle
Cc: kbuild-all, clang-built-linux, Linux Memory Management List,
Vasily Gorbik
[-- Attachment #1: Type: text/plain, Size: 11793 bytes --]
tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
head: 647060f3b592d3c8df0c85dd887557b03e6ea897
commit: 56e62a73702836017564eaacd5212e4d0fa1c01d [4125/4677] s390: convert to generic entry
config: s390-randconfig-r003-20210120 (attached as .config)
compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project 22b68440e1647e16b5ee24b924986207173c02d1)
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
# install s390 cross compiling tool for clang build
# apt-get install binutils-s390x-linux-gnu
# https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=56e62a73702836017564eaacd5212e4d0fa1c01d
git remote add linux-next https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git
git fetch --no-tags linux-next master
git checkout 56e62a73702836017564eaacd5212e4d0fa1c01d
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=s390
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>
All warnings (new ones prefixed by >>):
#define __le32_to_cpu(x) __swab32((__force __u32)(__le32)(x))
^
include/uapi/linux/swab.h:119:21: note: expanded from macro '__swab32'
___constant_swab32(x) : \
^
include/uapi/linux/swab.h:20:12: note: expanded from macro '___constant_swab32'
(((__u32)(x) & (__u32)0x0000ff00UL) << 8) | \
^
In file included from arch/s390/kernel/signal.c:27:
In file included from include/linux/tracehook.h:50:
In file included from include/linux/memcontrol.h:22:
In file included from include/linux/writeback.h:14:
In file included from include/linux/blk-cgroup.h:23:
In file included from include/linux/blkdev.h:26:
In file included from include/linux/scatterlist.h:9:
In file included from arch/s390/include/asm/io.h:80:
include/asm-generic/io.h:490:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
~~~~~~~~~~ ^
include/uapi/linux/byteorder/big_endian.h:34:59: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) __swab32((__force __u32)(__le32)(x))
^
include/uapi/linux/swab.h:119:21: note: expanded from macro '__swab32'
___constant_swab32(x) : \
^
include/uapi/linux/swab.h:21:12: note: expanded from macro '___constant_swab32'
(((__u32)(x) & (__u32)0x00ff0000UL) >> 8) | \
^
In file included from arch/s390/kernel/signal.c:27:
In file included from include/linux/tracehook.h:50:
In file included from include/linux/memcontrol.h:22:
In file included from include/linux/writeback.h:14:
In file included from include/linux/blk-cgroup.h:23:
In file included from include/linux/blkdev.h:26:
In file included from include/linux/scatterlist.h:9:
In file included from arch/s390/include/asm/io.h:80:
include/asm-generic/io.h:490:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
~~~~~~~~~~ ^
include/uapi/linux/byteorder/big_endian.h:34:59: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) __swab32((__force __u32)(__le32)(x))
^
include/uapi/linux/swab.h:119:21: note: expanded from macro '__swab32'
___constant_swab32(x) : \
^
include/uapi/linux/swab.h:22:12: note: expanded from macro '___constant_swab32'
(((__u32)(x) & (__u32)0xff000000UL) >> 24)))
^
In file included from arch/s390/kernel/signal.c:27:
In file included from include/linux/tracehook.h:50:
In file included from include/linux/memcontrol.h:22:
In file included from include/linux/writeback.h:14:
In file included from include/linux/blk-cgroup.h:23:
In file included from include/linux/blkdev.h:26:
In file included from include/linux/scatterlist.h:9:
In file included from arch/s390/include/asm/io.h:80:
include/asm-generic/io.h:490:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
~~~~~~~~~~ ^
include/uapi/linux/byteorder/big_endian.h:34:59: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) __swab32((__force __u32)(__le32)(x))
^
include/uapi/linux/swab.h:120:12: note: expanded from macro '__swab32'
__fswab32(x))
^
In file included from arch/s390/kernel/signal.c:27:
In file included from include/linux/tracehook.h:50:
In file included from include/linux/memcontrol.h:22:
In file included from include/linux/writeback.h:14:
In file included from include/linux/blk-cgroup.h:23:
In file included from include/linux/blkdev.h:26:
In file included from include/linux/scatterlist.h:9:
In file included from arch/s390/include/asm/io.h:80:
include/asm-generic/io.h:501:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
__raw_writeb(value, PCI_IOBASE + addr);
~~~~~~~~~~ ^
include/asm-generic/io.h:511:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
__raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
~~~~~~~~~~ ^
include/asm-generic/io.h:521:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
__raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
~~~~~~~~~~ ^
include/asm-generic/io.h:609:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
readsb(PCI_IOBASE + addr, buffer, count);
~~~~~~~~~~ ^
include/asm-generic/io.h:617:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
readsw(PCI_IOBASE + addr, buffer, count);
~~~~~~~~~~ ^
include/asm-generic/io.h:625:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
readsl(PCI_IOBASE + addr, buffer, count);
~~~~~~~~~~ ^
include/asm-generic/io.h:634:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
writesb(PCI_IOBASE + addr, buffer, count);
~~~~~~~~~~ ^
include/asm-generic/io.h:643:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
writesw(PCI_IOBASE + addr, buffer, count);
~~~~~~~~~~ ^
include/asm-generic/io.h:652:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
writesl(PCI_IOBASE + addr, buffer, count);
~~~~~~~~~~ ^
>> arch/s390/kernel/signal.c:464:6: warning: no previous prototype for function 'arch_do_signal_or_restart' [-Wmissing-prototypes]
void arch_do_signal_or_restart(struct pt_regs *regs, bool has_signal)
^
arch/s390/kernel/signal.c:464:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
void arch_do_signal_or_restart(struct pt_regs *regs, bool has_signal)
^
static
21 warnings generated.
vim +/arch_do_signal_or_restart +464 arch/s390/kernel/signal.c
453
454 /*
455 * Note that 'init' is a special process: it doesn't get signals it doesn't
456 * want to handle. Thus you cannot kill init even with a SIGKILL even by
457 * mistake.
458 *
459 * Note that we go through the signals twice: once to check the signals that
460 * the kernel can handle, and then we build all the user-level signal handling
461 * stack-frames in one go after that.
462 */
463
> 464 void arch_do_signal_or_restart(struct pt_regs *regs, bool has_signal)
465 {
466 struct ksignal ksig;
467 sigset_t *oldset = sigmask_to_save();
468
469 /*
470 * Get signal to deliver. When running under ptrace, at this point
471 * the debugger may change all our registers, including the system
472 * call information.
473 */
474 current->thread.system_call =
475 test_pt_regs_flag(regs, PIF_SYSCALL) ? regs->int_code : 0;
476
477 if (has_signal && get_signal(&ksig)) {
478 /* Whee! Actually deliver the signal. */
479 if (current->thread.system_call) {
480 regs->int_code = current->thread.system_call;
481 /* Check for system call restarting. */
482 switch (regs->gprs[2]) {
483 case -ERESTART_RESTARTBLOCK:
484 case -ERESTARTNOHAND:
485 regs->gprs[2] = -EINTR;
486 break;
487 case -ERESTARTSYS:
488 if (!(ksig.ka.sa.sa_flags & SA_RESTART)) {
489 regs->gprs[2] = -EINTR;
490 break;
491 }
492 fallthrough;
493 case -ERESTARTNOINTR:
494 regs->gprs[2] = regs->orig_gpr2;
495 regs->psw.addr =
496 __rewind_psw(regs->psw,
497 regs->int_code >> 16);
498 break;
499 }
500 }
501 /* No longer in a system call */
502 clear_pt_regs_flag(regs, PIF_SYSCALL);
503 clear_pt_regs_flag(regs, PIF_SYSCALL_RESTART);
504 rseq_signal_deliver(&ksig, regs);
505 if (is_compat_task())
506 handle_signal32(&ksig, oldset, regs);
507 else
508 handle_signal(&ksig, oldset, regs);
509 return;
510 }
511
512 /* No handlers present - check for system call restart */
513 clear_pt_regs_flag(regs, PIF_SYSCALL);
514 clear_pt_regs_flag(regs, PIF_SYSCALL_RESTART);
515 if (current->thread.system_call) {
516 regs->int_code = current->thread.system_call;
517 switch (regs->gprs[2]) {
518 case -ERESTART_RESTARTBLOCK:
519 /* Restart with sys_restart_syscall */
520 regs->int_code = __NR_restart_syscall;
521 fallthrough;
522 case -ERESTARTNOHAND:
523 case -ERESTARTSYS:
524 case -ERESTARTNOINTR:
525 /* Restart system call with magic TIF bit. */
526 regs->gprs[2] = regs->orig_gpr2;
527 set_pt_regs_flag(regs, PIF_SYSCALL_RESTART);
528 if (test_thread_flag(TIF_SINGLE_STEP))
529 clear_thread_flag(TIF_PER_TRAP);
530 break;
531 }
532 }
533
534 /*
535 * If there's no signal to deliver, we just put the saved sigmask back.
536 */
537 restore_saved_sigmask();
538 }
539
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org
[-- Attachment #2: .config.gz --]
[-- Type: application/gzip, Size: 14754 bytes --]
^ permalink raw reply [flat|nested] 2+ messages in thread
* [linux-next:master 4125/4677] arch/s390/kernel/signal.c:464:6: warning: no previous prototype for function 'arch_do_signal_or_restart'
@ 2021-01-20 17:44 ` kernel test robot
0 siblings, 0 replies; 2+ messages in thread
From: kernel test robot @ 2021-01-20 17:44 UTC (permalink / raw)
To: kbuild-all
[-- Attachment #1: Type: text/plain, Size: 12020 bytes --]
tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
head: 647060f3b592d3c8df0c85dd887557b03e6ea897
commit: 56e62a73702836017564eaacd5212e4d0fa1c01d [4125/4677] s390: convert to generic entry
config: s390-randconfig-r003-20210120 (attached as .config)
compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project 22b68440e1647e16b5ee24b924986207173c02d1)
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
# install s390 cross compiling tool for clang build
# apt-get install binutils-s390x-linux-gnu
# https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=56e62a73702836017564eaacd5212e4d0fa1c01d
git remote add linux-next https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git
git fetch --no-tags linux-next master
git checkout 56e62a73702836017564eaacd5212e4d0fa1c01d
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=s390
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>
All warnings (new ones prefixed by >>):
#define __le32_to_cpu(x) __swab32((__force __u32)(__le32)(x))
^
include/uapi/linux/swab.h:119:21: note: expanded from macro '__swab32'
___constant_swab32(x) : \
^
include/uapi/linux/swab.h:20:12: note: expanded from macro '___constant_swab32'
(((__u32)(x) & (__u32)0x0000ff00UL) << 8) | \
^
In file included from arch/s390/kernel/signal.c:27:
In file included from include/linux/tracehook.h:50:
In file included from include/linux/memcontrol.h:22:
In file included from include/linux/writeback.h:14:
In file included from include/linux/blk-cgroup.h:23:
In file included from include/linux/blkdev.h:26:
In file included from include/linux/scatterlist.h:9:
In file included from arch/s390/include/asm/io.h:80:
include/asm-generic/io.h:490:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
~~~~~~~~~~ ^
include/uapi/linux/byteorder/big_endian.h:34:59: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) __swab32((__force __u32)(__le32)(x))
^
include/uapi/linux/swab.h:119:21: note: expanded from macro '__swab32'
___constant_swab32(x) : \
^
include/uapi/linux/swab.h:21:12: note: expanded from macro '___constant_swab32'
(((__u32)(x) & (__u32)0x00ff0000UL) >> 8) | \
^
In file included from arch/s390/kernel/signal.c:27:
In file included from include/linux/tracehook.h:50:
In file included from include/linux/memcontrol.h:22:
In file included from include/linux/writeback.h:14:
In file included from include/linux/blk-cgroup.h:23:
In file included from include/linux/blkdev.h:26:
In file included from include/linux/scatterlist.h:9:
In file included from arch/s390/include/asm/io.h:80:
include/asm-generic/io.h:490:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
~~~~~~~~~~ ^
include/uapi/linux/byteorder/big_endian.h:34:59: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) __swab32((__force __u32)(__le32)(x))
^
include/uapi/linux/swab.h:119:21: note: expanded from macro '__swab32'
___constant_swab32(x) : \
^
include/uapi/linux/swab.h:22:12: note: expanded from macro '___constant_swab32'
(((__u32)(x) & (__u32)0xff000000UL) >> 24)))
^
In file included from arch/s390/kernel/signal.c:27:
In file included from include/linux/tracehook.h:50:
In file included from include/linux/memcontrol.h:22:
In file included from include/linux/writeback.h:14:
In file included from include/linux/blk-cgroup.h:23:
In file included from include/linux/blkdev.h:26:
In file included from include/linux/scatterlist.h:9:
In file included from arch/s390/include/asm/io.h:80:
include/asm-generic/io.h:490:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
~~~~~~~~~~ ^
include/uapi/linux/byteorder/big_endian.h:34:59: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) __swab32((__force __u32)(__le32)(x))
^
include/uapi/linux/swab.h:120:12: note: expanded from macro '__swab32'
__fswab32(x))
^
In file included from arch/s390/kernel/signal.c:27:
In file included from include/linux/tracehook.h:50:
In file included from include/linux/memcontrol.h:22:
In file included from include/linux/writeback.h:14:
In file included from include/linux/blk-cgroup.h:23:
In file included from include/linux/blkdev.h:26:
In file included from include/linux/scatterlist.h:9:
In file included from arch/s390/include/asm/io.h:80:
include/asm-generic/io.h:501:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
__raw_writeb(value, PCI_IOBASE + addr);
~~~~~~~~~~ ^
include/asm-generic/io.h:511:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
__raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
~~~~~~~~~~ ^
include/asm-generic/io.h:521:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
__raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
~~~~~~~~~~ ^
include/asm-generic/io.h:609:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
readsb(PCI_IOBASE + addr, buffer, count);
~~~~~~~~~~ ^
include/asm-generic/io.h:617:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
readsw(PCI_IOBASE + addr, buffer, count);
~~~~~~~~~~ ^
include/asm-generic/io.h:625:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
readsl(PCI_IOBASE + addr, buffer, count);
~~~~~~~~~~ ^
include/asm-generic/io.h:634:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
writesb(PCI_IOBASE + addr, buffer, count);
~~~~~~~~~~ ^
include/asm-generic/io.h:643:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
writesw(PCI_IOBASE + addr, buffer, count);
~~~~~~~~~~ ^
include/asm-generic/io.h:652:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
writesl(PCI_IOBASE + addr, buffer, count);
~~~~~~~~~~ ^
>> arch/s390/kernel/signal.c:464:6: warning: no previous prototype for function 'arch_do_signal_or_restart' [-Wmissing-prototypes]
void arch_do_signal_or_restart(struct pt_regs *regs, bool has_signal)
^
arch/s390/kernel/signal.c:464:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
void arch_do_signal_or_restart(struct pt_regs *regs, bool has_signal)
^
static
21 warnings generated.
vim +/arch_do_signal_or_restart +464 arch/s390/kernel/signal.c
453
454 /*
455 * Note that 'init' is a special process: it doesn't get signals it doesn't
456 * want to handle. Thus you cannot kill init even with a SIGKILL even by
457 * mistake.
458 *
459 * Note that we go through the signals twice: once to check the signals that
460 * the kernel can handle, and then we build all the user-level signal handling
461 * stack-frames in one go after that.
462 */
463
> 464 void arch_do_signal_or_restart(struct pt_regs *regs, bool has_signal)
465 {
466 struct ksignal ksig;
467 sigset_t *oldset = sigmask_to_save();
468
469 /*
470 * Get signal to deliver. When running under ptrace, at this point
471 * the debugger may change all our registers, including the system
472 * call information.
473 */
474 current->thread.system_call =
475 test_pt_regs_flag(regs, PIF_SYSCALL) ? regs->int_code : 0;
476
477 if (has_signal && get_signal(&ksig)) {
478 /* Whee! Actually deliver the signal. */
479 if (current->thread.system_call) {
480 regs->int_code = current->thread.system_call;
481 /* Check for system call restarting. */
482 switch (regs->gprs[2]) {
483 case -ERESTART_RESTARTBLOCK:
484 case -ERESTARTNOHAND:
485 regs->gprs[2] = -EINTR;
486 break;
487 case -ERESTARTSYS:
488 if (!(ksig.ka.sa.sa_flags & SA_RESTART)) {
489 regs->gprs[2] = -EINTR;
490 break;
491 }
492 fallthrough;
493 case -ERESTARTNOINTR:
494 regs->gprs[2] = regs->orig_gpr2;
495 regs->psw.addr =
496 __rewind_psw(regs->psw,
497 regs->int_code >> 16);
498 break;
499 }
500 }
501 /* No longer in a system call */
502 clear_pt_regs_flag(regs, PIF_SYSCALL);
503 clear_pt_regs_flag(regs, PIF_SYSCALL_RESTART);
504 rseq_signal_deliver(&ksig, regs);
505 if (is_compat_task())
506 handle_signal32(&ksig, oldset, regs);
507 else
508 handle_signal(&ksig, oldset, regs);
509 return;
510 }
511
512 /* No handlers present - check for system call restart */
513 clear_pt_regs_flag(regs, PIF_SYSCALL);
514 clear_pt_regs_flag(regs, PIF_SYSCALL_RESTART);
515 if (current->thread.system_call) {
516 regs->int_code = current->thread.system_call;
517 switch (regs->gprs[2]) {
518 case -ERESTART_RESTARTBLOCK:
519 /* Restart with sys_restart_syscall */
520 regs->int_code = __NR_restart_syscall;
521 fallthrough;
522 case -ERESTARTNOHAND:
523 case -ERESTARTSYS:
524 case -ERESTARTNOINTR:
525 /* Restart system call with magic TIF bit. */
526 regs->gprs[2] = regs->orig_gpr2;
527 set_pt_regs_flag(regs, PIF_SYSCALL_RESTART);
528 if (test_thread_flag(TIF_SINGLE_STEP))
529 clear_thread_flag(TIF_PER_TRAP);
530 break;
531 }
532 }
533
534 /*
535 * If there's no signal to deliver, we just put the saved sigmask back.
536 */
537 restore_saved_sigmask();
538 }
539
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all(a)lists.01.org
[-- Attachment #2: config.gz --]
[-- Type: application/gzip, Size: 14754 bytes --]
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end of thread, other threads:[~2021-01-20 17:45 UTC | newest]
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2021-01-20 17:44 [linux-next:master 4125/4677] arch/s390/kernel/signal.c:464:6: warning: no previous prototype for function 'arch_do_signal_or_restart' kernel test robot
2021-01-20 17:44 ` kernel test robot
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