Re: [kbuild-all] Re: [ardb:for-kernelci 25/25] arch/arm/kernel/traps.c:865:17: warning: no previous prototype for function 'handle_bad_stack'
From: Rong Chen
Date: Thu Dec 02 2021 - 02:34:48 EST
On 11/30/21 21:12, Ard Biesheuvel wrote:
On Thu, 25 Nov 2021 at 02:35, kernel test robot <lkp@xxxxxxxxx> wrote:
tree: git://git.kernel.org/pub/scm/linux/kernel/git/ardb/linux.git for-kernelci
head: 5da04a8b7050432b72f6551b6c95e4b5b5fd68d1
commit: 5da04a8b7050432b72f6551b6c95e4b5b5fd68d1 [25/25] ARM: implement THREAD_INFO_IN_TASK for uniprocessor systems
config: arm-randconfig-r024-20211124 (https://download.01.org/0day-ci/archive/20211125/202111250918.ErFZktQF-lkp@xxxxxxxxx/config)
compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project 67a1c45def8a75061203461ab0060c75c864df1c)
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/ardb/linux.git/commit/?id=5da04a8b7050432b72f6551b6c95e4b5b5fd68d1
git remote add ardb git://git.kernel.org/pub/scm/linux/kernel/git/ardb/linux.git
git fetch --no-tags ardb for-kernelci
git checkout 5da04a8b7050432b72f6551b6c95e4b5b5fd68d1
# save the config file to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 ARCH=arm
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@xxxxxxxxx>
All warnings (new ones prefixed by >>):
This is yet another false positive. asmlinkage routines don't need a
prototype because they are called from assembler. This is not going to
get fixed, so please don't report this error anymore.
Hi Ard,
Sorry for the noise, we'll ignore the warnings in the future.
Best Regards,
Rong Chen
arch/arm/kernel/traps.c:95:6: 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:95:1: 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:446:17: warning: no previous prototype for function 'do_undefinstr' [-Wmissing-prototypes]
asmlinkage void do_undefinstr(struct pt_regs *regs)
^
arch/arm/kernel/traps.c:446:12: 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:511:39: 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:511:12: 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:530:17: 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:530:12: 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:603:16: 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:603:12: 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:729:1: warning: no previous prototype for function 'baddataabort' [-Wmissing-prototypes]
baddataabort(int code, unsigned long instr, struct pt_regs *regs)
^
arch/arm/kernel/traps.c:728:12: 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:769:17: warning: no previous prototype for function '__div0' [-Wmissing-prototypes]
asmlinkage void __div0(void)
^
arch/arm/kernel/traps.c:769:12: 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:865:17: warning: no previous prototype for function 'handle_bad_stack' [-Wmissing-prototypes]
asmlinkage void handle_bad_stack(struct pt_regs *regs)
^
arch/arm/kernel/traps.c:865:12: note: declare 'static' if the function is not intended to be used outside of this translation unit
asmlinkage void handle_bad_stack(struct pt_regs *regs)
^
static
8 warnings generated.
vim +/handle_bad_stack +865 arch/arm/kernel/traps.c
adc7d753de62f2 Ard Biesheuvel 2021-09-23 864
adc7d753de62f2 Ard Biesheuvel 2021-09-23 @865 asmlinkage void handle_bad_stack(struct pt_regs *regs)
adc7d753de62f2 Ard Biesheuvel 2021-09-23 866 {
adc7d753de62f2 Ard Biesheuvel 2021-09-23 867 unsigned long tsk_stk = (unsigned long)current->stack;
5da04a8b705043 Ard Biesheuvel 2021-11-24 868 #ifdef CONFIG_IRQSTACKS
adc7d753de62f2 Ard Biesheuvel 2021-09-23 869 unsigned long irq_stk = (unsigned long)this_cpu_read(irq_stack_ptr);
5da04a8b705043 Ard Biesheuvel 2021-11-24 870 #endif
adc7d753de62f2 Ard Biesheuvel 2021-09-23 871 unsigned long ovf_stk = (unsigned long)this_cpu_read(overflow_stack_ptr);
adc7d753de62f2 Ard Biesheuvel 2021-09-23 872
adc7d753de62f2 Ard Biesheuvel 2021-09-23 873 console_verbose();
adc7d753de62f2 Ard Biesheuvel 2021-09-23 874 pr_emerg("Insufficient stack space to handle exception!");
adc7d753de62f2 Ard Biesheuvel 2021-09-23 875
adc7d753de62f2 Ard Biesheuvel 2021-09-23 876 pr_emerg("Task stack: [0x%08lx..0x%08lx]\n",
adc7d753de62f2 Ard Biesheuvel 2021-09-23 877 tsk_stk, tsk_stk + THREAD_SIZE);
5da04a8b705043 Ard Biesheuvel 2021-11-24 878 #ifdef CONFIG_IRQSTACKS
adc7d753de62f2 Ard Biesheuvel 2021-09-23 879 pr_emerg("IRQ stack: [0x%08lx..0x%08lx]\n",
adc7d753de62f2 Ard Biesheuvel 2021-09-23 880 irq_stk - THREAD_SIZE, irq_stk);
5da04a8b705043 Ard Biesheuvel 2021-11-24 881 #endif
adc7d753de62f2 Ard Biesheuvel 2021-09-23 882 pr_emerg("Overflow stack: [0x%08lx..0x%08lx]\n",
adc7d753de62f2 Ard Biesheuvel 2021-09-23 883 ovf_stk - OVERFLOW_STACK_SIZE, ovf_stk);
adc7d753de62f2 Ard Biesheuvel 2021-09-23 884
adc7d753de62f2 Ard Biesheuvel 2021-09-23 885 die("kernel stack overflow", regs, 0);
adc7d753de62f2 Ard Biesheuvel 2021-09-23 886 }
adc7d753de62f2 Ard Biesheuvel 2021-09-23 887
:::::: The code at line 865 was first introduced by commit
:::::: adc7d753de62f220505f528106a6d618104302c5 ARM: implement support for vmap'ed stacks
:::::: TO: Ard Biesheuvel <ardb@xxxxxxxxxx>
:::::: CC: Ard Biesheuvel <ardb@xxxxxxxxxx>
---
0-DAY CI Kernel Test Service, Intel Corporation
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