samples/ftrace/ftrace-direct.o: warning: objtool: my_tramp+0x24: sibling call from callable instruction with modified stack frame

samples/ftrace/ftrace-direct.o: warning: objtool: my_tramp+0x24: sibling call from callable instruction with modified stack frame

[kernel test robot]

Hi Chenghao,

FYI, the error/warning was bisected to this commit, please ignore it if it's irrelevant.

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   770aaedb461a055f79b971d538678942b6607894
commit: bb85d206be208bbf834883e948125a35ac59993a samples/ftrace: Adjust LoongArch register restore order in direct calls
date:   6 weeks ago
config: loongarch-randconfig-r053-20260214 (https://download.01.org/0day-ci/archive/20260214/202602141800.mGEfj7iw-lkp@intel.com/config)
compiler: clang version 18.1.8 (https://github.com/llvm/llvm-project 3b5b5c1ec4a3095ab096dd780e84d7ab81f3d7ff)
rustc: rustc 1.88.0 (6b00bc388 2025-06-23)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260214/202602141800.mGEfj7iw-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202602141800.mGEfj7iw-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> samples/ftrace/ftrace-direct.o: warning: objtool: my_tramp+0x24: sibling call from callable instruction with modified stack frame

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki