[linux-stable-rc:linux-4.19.y 1864/4040] arch/ia64/kernel/kprobes.c:414:17: error: implicit declaration of function '__kretprobe_trampoline_handler'; did you mean 'kretprobe_trampoline'?

From: kernel test robot
Date: Thu Jul 22 2021 - 00:02:22 EST

Hi Masami,

FYI, the error/warning still remains.

tree: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git linux-4.19.y
head: 5a3ba2f90f8789162a03e07a37224bab4c643d1d
commit: d3380de483d55d904fb94a241406b34ed2fada7d [1864/4040] ia64: kprobes: Use generic kretprobe trampoline handler
config: ia64-allmodconfig (attached as .config)
compiler: ia64-linux-gcc (GCC) 10.3.0
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://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git/commit/?id=d3380de483d55d904fb94a241406b34ed2fada7d
git remote add linux-stable-rc https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git
git fetch --no-tags linux-stable-rc linux-4.19.y
git checkout d3380de483d55d904fb94a241406b34ed2fada7d
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-10.3.0 make.cross ARCH=ia64

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@xxxxxxxxx>

All errors (new ones prefixed by >>):

arch/ia64/kernel/kprobes.c: In function 'get_kprobe_inst':
arch/ia64/kernel/kprobes.c:338:15: warning: variable 'template' set but not used [-Wunused-but-set-variable]
338 | unsigned int template;
| ^~~~~~~~
arch/ia64/kernel/kprobes.c: At top level:
arch/ia64/kernel/kprobes.c:412:15: warning: no previous prototype for 'trampoline_probe_handler' [-Wmissing-prototypes]
412 | int __kprobes trampoline_probe_handler(struct kprobe *p, struct pt_regs *regs)
| ^~~~~~~~~~~~~~~~~~~~~~~~
arch/ia64/kernel/kprobes.c: In function 'trampoline_probe_handler':
>> arch/ia64/kernel/kprobes.c:414:17: error: implicit declaration of function '__kretprobe_trampoline_handler'; did you mean 'kretprobe_trampoline'? [-Werror=implicit-function-declaration]
414 | regs->cr_iip = __kretprobe_trampoline_handler(regs, kretprobe_trampoline, NULL);
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
| kretprobe_trampoline
At top level:
arch/ia64/kernel/kprobes.c:928:13: warning: 'ia64_get_bsp_cfm' defined but not used [-Wunused-function]
928 | static void ia64_get_bsp_cfm(struct unw_frame_info *info, void *arg)
| ^~~~~~~~~~~~~~~~
cc1: some warnings being treated as errors

Kconfig warnings: (for reference only)
WARNING: unmet direct dependencies detected for FRAME_POINTER
Selected by

vim +414 arch/ia64/kernel/kprobes.c

412 int __kprobes trampoline_probe_handler(struct kprobe *p, struct pt_regs *regs)
413 {
> 414 regs->cr_iip = __kretprobe_trampoline_handler(regs, kretprobe_trampoline, NULL);
415 /*
416 * By returning a non-zero value, we are telling
417 * kprobe_handler() that we don't want the post_handler
418 * to run (and have re-enabled preemption)
419 */
420 return 1;
421 }

0-DAY CI Kernel Test Service, Intel Corporation

Attachment: .config.gz
Description: application/gzip