2021-11-25 01:39:30

by kernel test robot

[permalink] [raw]
Subject: [ardb:for-kernelci 25/25] arch/arm/kernel/traps.c:865:17: warning: no previous prototype for function 'handle_bad_stack'

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/[email protected]/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 <[email protected]>

All warnings (new ones prefixed by >>):

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 <[email protected]>
:::::: CC: Ard Biesheuvel <[email protected]>

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/[email protected]


2021-11-30 13:12:34

by Ard Biesheuvel

[permalink] [raw]
Subject: Re: [ardb:for-kernelci 25/25] arch/arm/kernel/traps.c:865:17: warning: no previous prototype for function 'handle_bad_stack'

On Thu, 25 Nov 2021 at 02:35, kernel test robot <[email protected]> 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/[email protected]/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 <[email protected]>
>
> 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.



> 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 <[email protected]>
> :::::: CC: Ard Biesheuvel <[email protected]>
>
> ---
> 0-DAY CI Kernel Test Service, Intel Corporation
> https://lists.01.org/hyperkitty/list/[email protected]

2021-12-02 07:34:49

by Chen, Rong A

[permalink] [raw]
Subject: 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'



On 11/30/21 21:12, Ard Biesheuvel wrote:
> On Thu, 25 Nov 2021 at 02:35, kernel test robot <[email protected]> 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/[email protected]/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 <[email protected]>
>>
>> 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 <[email protected]>
>> :::::: CC: Ard Biesheuvel <[email protected]>
>>
>> ---
>> 0-DAY CI Kernel Test Service, Intel Corporation
>> https://lists.01.org/hyperkitty/list/[email protected]
> _______________________________________________
> kbuild-all mailing list -- [email protected]
> To unsubscribe send an email to [email protected]


2021-12-02 07:53:34

by Ard Biesheuvel

[permalink] [raw]
Subject: 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'

On Thu, 2 Dec 2021 at 08:34, Rong Chen <[email protected]> wrote:
>
>
>
> On 11/30/21 21:12, Ard Biesheuvel wrote:
> > On Thu, 25 Nov 2021 at 02:35, kernel test robot <[email protected]> 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/[email protected]/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 <[email protected]>
> >>
> >> 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.
>

Thanks! And if at all possible, please extend this to all routines
marked as asmlinkage?

--
Ard.

2021-12-02 08:03:36

by Chen, Rong A

[permalink] [raw]
Subject: 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'



On 12/2/21 15:53, Ard Biesheuvel wrote:
> On Thu, 2 Dec 2021 at 08:34, Rong Chen <[email protected]> wrote:
>>
>>
>> On 11/30/21 21:12, Ard Biesheuvel wrote:
>>> On Thu, 25 Nov 2021 at 02:35, kernel test robot <[email protected]> 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/[email protected]/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 <[email protected]>
>>>>
>>>> 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.
>>
> Thanks! And if at all possible, please extend this to all routines
> marked as asmlinkage?
>

got it, thanks for your reminding.

Best Regards,
Rong Chen