Hi Ard,
FYI, the error/warning still remains.
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: 2a987e65025e2b79c6d453b78cb5985ac6e5eb26
commit: 4d576cab16f57e1f87978f6997a725179398341e ARM: 9028/1: disable KASAN in call stack capturing routines
date: 1 year ago
config: arm-randconfig-c002-20211209 (https://download.01.org/0day-ci/archive/20211209/[email protected]/config)
compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project 097a1cb1d5ebb3a0ec4bcaed8ba3ff6a8e33c00a)
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 arm cross compiling tool for clang build
# apt-get install binutils-arm-linux-gnueabi
# https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=4d576cab16f57e1f87978f6997a725179398341e
git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
git fetch --no-tags linus master
git checkout 4d576cab16f57e1f87978f6997a725179398341e
# save the config file to linux build tree
mkdir build_dir
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=arm SHELL=/bin/bash arch/arm/kernel/ drivers/media/platform/
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <[email protected]>
All warnings (new ones prefixed by >>):
arch/arm/kernel/traps.c:82:6: warning: no previous prototype for function 'dump_backtrace_stm' [-Wmissing-prototypes]
void dump_backtrace_stm(u32 *stack, u32 instruction, const char *loglvl)
^
arch/arm/kernel/traps.c:82:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
void dump_backtrace_stm(u32 *stack, u32 instruction, const char *loglvl)
^
static
arch/arm/kernel/traps.c:445:17: warning: no previous prototype for function 'do_undefinstr' [-Wmissing-prototypes]
asmlinkage void do_undefinstr(struct pt_regs *regs)
^
arch/arm/kernel/traps.c:445:12: note: declare 'static' if the function is not intended to be used outside of this translation unit
asmlinkage void do_undefinstr(struct pt_regs *regs)
^
static
arch/arm/kernel/traps.c:510:39: warning: no previous prototype for function 'handle_fiq_as_nmi' [-Wmissing-prototypes]
asmlinkage void __exception_irq_entry handle_fiq_as_nmi(struct pt_regs *regs)
^
arch/arm/kernel/traps.c:510:12: note: declare 'static' if the function is not intended to be used outside of this translation unit
asmlinkage void __exception_irq_entry handle_fiq_as_nmi(struct pt_regs *regs)
^
static
arch/arm/kernel/traps.c:529:17: warning: no previous prototype for function 'bad_mode' [-Wmissing-prototypes]
asmlinkage void bad_mode(struct pt_regs *regs, int reason)
^
arch/arm/kernel/traps.c:529:12: note: declare 'static' if the function is not intended to be used outside of this translation unit
asmlinkage void bad_mode(struct pt_regs *regs, int reason)
^
static
arch/arm/kernel/traps.c:602:16: warning: no previous prototype for function 'arm_syscall' [-Wmissing-prototypes]
asmlinkage int arm_syscall(int no, struct pt_regs *regs)
^
arch/arm/kernel/traps.c:602:12: note: declare 'static' if the function is not intended to be used outside of this translation unit
asmlinkage int arm_syscall(int no, struct pt_regs *regs)
^
static
arch/arm/kernel/traps.c:728:1: warning: no previous prototype for function 'baddataabort' [-Wmissing-prototypes]
baddataabort(int code, unsigned long instr, struct pt_regs *regs)
^
arch/arm/kernel/traps.c:727:12: note: declare 'static' if the function is not intended to be used outside of this translation unit
asmlinkage void
^
static
arch/arm/kernel/traps.c:768:17: warning: no previous prototype for function '__div0' [-Wmissing-prototypes]
asmlinkage void __div0(void)
^
arch/arm/kernel/traps.c:768:12: note: declare 'static' if the function is not intended to be used outside of this translation unit
asmlinkage void __div0(void)
^
static
>> arch/arm/kernel/traps.c:775:6: warning: no previous prototype for function 'abort' [-Wmissing-prototypes]
void abort(void)
^
arch/arm/kernel/traps.c:775:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
void abort(void)
^
static
arch/arm/kernel/traps.c:783:13: warning: no previous prototype for function 'trap_init' [-Wmissing-prototypes]
void __init trap_init(void)
^
arch/arm/kernel/traps.c:783:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
void __init trap_init(void)
^
static
9 warnings generated.
vim +/abort +775 arch/arm/kernel/traps.c
^1da177e4c3f41 Linus Torvalds 2005-04-16 767
^1da177e4c3f41 Linus Torvalds 2005-04-16 @768 asmlinkage void __div0(void)
^1da177e4c3f41 Linus Torvalds 2005-04-16 769 {
4ed89f22280614 Russell King 2014-10-28 770 pr_err("Division by zero in kernel.\n");
^1da177e4c3f41 Linus Torvalds 2005-04-16 771 dump_stack();
^1da177e4c3f41 Linus Torvalds 2005-04-16 772 }
^1da177e4c3f41 Linus Torvalds 2005-04-16 773 EXPORT_SYMBOL(__div0);
^1da177e4c3f41 Linus Torvalds 2005-04-16 774
^1da177e4c3f41 Linus Torvalds 2005-04-16 @775 void abort(void)
^1da177e4c3f41 Linus Torvalds 2005-04-16 776 {
^1da177e4c3f41 Linus Torvalds 2005-04-16 777 BUG();
^1da177e4c3f41 Linus Torvalds 2005-04-16 778
^1da177e4c3f41 Linus Torvalds 2005-04-16 779 /* if that doesn't kill us, halt */
^1da177e4c3f41 Linus Torvalds 2005-04-16 780 panic("Oops failed to kill thread");
^1da177e4c3f41 Linus Torvalds 2005-04-16 781 }
^1da177e4c3f41 Linus Torvalds 2005-04-16 782
:::::: The code at line 775 was first introduced by commit
:::::: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Linux-2.6.12-rc2
:::::: TO: Linus Torvalds <[email protected]>
:::::: CC: Linus Torvalds <[email protected]>
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/[email protected]
On Thu, Dec 09, 2021 at 11:22:48PM +0800, kernel test robot wrote:
> Hi Ard,
>
> FYI, the error/warning still remains.
This is nothing new. You claim that the abort() warning newly shows up
as a result of a recent change, but I can most definitely assure you
that abort() has never had a prototype, and it's there because the
compiler can generate code that issues a branch to this function.
This can be seen in the blame output, which references the first commit
in the kernel tree for these lines.
--
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