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SubjectRe: [PATCH] rethook: add riscv rethook implementation.
Hi Binglei,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on rostedt-trace/for-next]
[also build test ERROR on linus/master v6.0-rc6 next-20220921]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url: https://github.com/intel-lab-lkp/linux/commits/Binglei-Wang/rethook-add-riscv-rethook-implementation/20220922-120748
base: https://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace.git for-next
config: arc-defconfig (https://download.01.org/0day-ci/archive/20220922/202209221624.rWsWQbRt-lkp@intel.com/config)
compiler: arc-elf-gcc (GCC) 12.1.0
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
# https://github.com/intel-lab-lkp/linux/commit/3f86f610d114317cd7f7a7a1c9116fa0b916667a
git remote add linux-review https://github.com/intel-lab-lkp/linux
git fetch --no-tags linux-review Binglei-Wang/rethook-add-riscv-rethook-implementation/20220922-120748
git checkout 3f86f610d114317cd7f7a7a1c9116fa0b916667a
# save the config file
mkdir build_dir && cp config build_dir/.config
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=arc SHELL=/bin/bash

If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@intel.com>

All errors (new ones prefixed by >>):

In file included from arch/arc/kernel/kprobes.c:7:
include/linux/kprobes.h: In function 'arch_prepare_kretprobe':
include/linux/kprobes.h:225:49: error: 'struct pt_regs' has no member named 'ra'; did you mean 'r0'?
225 | ri->ret_addr = (kprobe_opcode_t *)regs->ra;
| ^~
| r0
include/linux/kprobes.h:227:15: error: 'struct pt_regs' has no member named 'ra'; did you mean 'r0'?
227 | regs->ra = (unsigned long) &__kretprobe_trampoline;
| ^~
| r0
arch/arc/kernel/kprobes.c: At top level:
arch/arc/kernel/kprobes.c:193:15: warning: no previous prototype for 'arc_kprobe_handler' [-Wmissing-prototypes]
193 | int __kprobes arc_kprobe_handler(unsigned long addr, struct pt_regs *regs)
| ^~~~~~~~~~~~~~~~~~
>> arch/arc/kernel/kprobes.c:371:16: error: redefinition of 'arch_prepare_kretprobe'
371 | void __kprobes arch_prepare_kretprobe(struct kretprobe_instance *ri,
| ^~~~~~~~~~~~~~~~~~~~~~
include/linux/kprobes.h:222:29: note: previous definition of 'arch_prepare_kretprobe' with type 'void(struct kretprobe_instance *, struct pt_regs *)'
222 | static nokprobe_inline void arch_prepare_kretprobe(struct kretprobe_instance *ri,
| ^~~~~~~~~~~~~~~~~~~~~~


vim +/arch_prepare_kretprobe +371 arch/arc/kernel/kprobes.c

4d86dfbbda09b3 Vineet Gupta 2013-01-22 370
4d86dfbbda09b3 Vineet Gupta 2013-01-22 @371 void __kprobes arch_prepare_kretprobe(struct kretprobe_instance *ri,
4d86dfbbda09b3 Vineet Gupta 2013-01-22 372 struct pt_regs *regs)
4d86dfbbda09b3 Vineet Gupta 2013-01-22 373 {
4d86dfbbda09b3 Vineet Gupta 2013-01-22 374
4d86dfbbda09b3 Vineet Gupta 2013-01-22 375 ri->ret_addr = (kprobe_opcode_t *) regs->blink;
f75dd136b65ccc Masami Hiramatsu 2020-08-29 376 ri->fp = NULL;
4d86dfbbda09b3 Vineet Gupta 2013-01-22 377
4d86dfbbda09b3 Vineet Gupta 2013-01-22 378 /* Replace the return addr with trampoline addr */
adf8a61a940c49 Masami Hiramatsu 2021-09-14 379 regs->blink = (unsigned long)&__kretprobe_trampoline;
4d86dfbbda09b3 Vineet Gupta 2013-01-22 380 }
4d86dfbbda09b3 Vineet Gupta 2013-01-22 381

--
0-DAY CI Kernel Test Service
https://01.org/lkp

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