* [riscv:for-next 24/26] arch/riscv/kernel/traps.c:210:26: warning: no previous prototype for function 'get_overflow_stack'
@ 2021-06-15 20:21 kernel test robot
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From: kernel test robot @ 2021-06-15 20:21 UTC (permalink / raw)
To: kbuild-all
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tree: https://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux.git for-next
head: 514e9eea526920608dcd6383e79b369f8ce55174
commit: 7b9dbbb41e1e6579d21fbec1d85ed04a392f73e9 [24/26] riscv: add VMAP_STACK overflow detection
config: riscv-randconfig-r015-20210615 (attached as .config)
compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project 64720f57bea6a6bf033feef4a5751ab9c0c3b401)
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 riscv cross compiling tool for clang build
# apt-get install binutils-riscv64-linux-gnu
# https://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux.git/commit/?id=7b9dbbb41e1e6579d21fbec1d85ed04a392f73e9
git remote add riscv https://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux.git
git fetch --no-tags riscv for-next
git checkout 7b9dbbb41e1e6579d21fbec1d85ed04a392f73e9
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=riscv
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 >>):
>> arch/riscv/kernel/traps.c:210:26: warning: no previous prototype for function 'get_overflow_stack' [-Wmissing-prototypes]
asmlinkage unsigned long get_overflow_stack(void)
^
arch/riscv/kernel/traps.c:210:12: note: declare 'static' if the function is not intended to be used outside of this translation unit
asmlinkage unsigned long get_overflow_stack(void)
^
static
>> arch/riscv/kernel/traps.c:216:17: warning: no previous prototype for function 'handle_bad_stack' [-Wmissing-prototypes]
asmlinkage void handle_bad_stack(struct pt_regs *regs)
^
arch/riscv/kernel/traps.c:216:12: 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
2 warnings generated.
vim +/get_overflow_stack +210 arch/riscv/kernel/traps.c
201
202 #ifdef CONFIG_VMAP_STACK
203 DEFINE_PER_CPU(unsigned long [OVERFLOW_STACK_SIZE/sizeof(long)], overflow_stack)
204 __aligned(16);
205 /*
206 * shadow stack, handled_ kernel_ stack_ overflow(in kernel/entry.S) is used
207 * to get per-cpu overflow stack(get_overflow_stack).
208 */
209 long shadow_stack[SHADOW_OVERFLOW_STACK_SIZE/sizeof(long)];
> 210 asmlinkage unsigned long get_overflow_stack(void)
211 {
212 return (unsigned long)this_cpu_ptr(overflow_stack) +
213 OVERFLOW_STACK_SIZE;
214 }
215
> 216 asmlinkage void handle_bad_stack(struct pt_regs *regs)
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all(a)lists.01.org
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2021-06-15 20:21 [riscv:for-next 24/26] arch/riscv/kernel/traps.c:210:26: warning: no previous prototype for function 'get_overflow_stack' kernel test robot
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