Re: [RFC PATCH 4/5] ftrace: Add ftrace_partial_regs() for converting ftrace_regs to pt_regs

[kernel test robot <lkp@intel.com>]

Hi Masami,

[This is a private test report for your RFC patch.]
kernel test robot noticed the following build errors:

[auto build test ERROR on bpf-next/master]
[also build test ERROR on bpf/master tip/x86/core linus/master v6.5-rc4 next-20230804]
[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/Masami-Hiramatsu-Google/fprobe-Use-fprobe_regs-in-fprobe-entry-handler/20230805-230025
base:   https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next.git master
patch link:    https://lore.kernel.org/r/169124751584.186149.17291016280237570755.stgit%40devnote2
patch subject: [RFC PATCH 4/5] ftrace: Add ftrace_partial_regs() for converting ftrace_regs to pt_regs
config: arm64-randconfig-r034-20230805 (https://download.01.org/0day-ci/archive/20230806/202308060110.eb8bH6SE-lkp@intel.com/config)
compiler: aarch64-linux-gcc (GCC) 12.3.0
reproduce: (https://download.01.org/0day-ci/archive/20230806/202308060110.eb8bH6SE-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/202308060110.eb8bH6SE-lkp@intel.com/

All errors (new ones prefixed by >>):

   In file included from include/linux/ftrace.h:23,
                    from arch/arm64/kernel/asm-offsets.c:12:
   arch/arm64/include/asm/ftrace.h: In function 'ftrace_partial_regs':
>> arch/arm64/include/asm/ftrace.h:146:13: error: 'struct pt_regs' has no member named 'x'
     146 |         regs->x[29] = fregs->fp;
         |             ^~
   arch/arm64/include/asm/ftrace.h:147:13: error: 'struct pt_regs' has no member named 'x'
     147 |         regs->x[30] = fregs->lr;
         |             ^~
   make[3]: *** [scripts/Makefile.build:116: arch/arm64/kernel/asm-offsets.s] Error 1 shuffle=1275155403
   make[3]: Target 'prepare' not remade because of errors.
   make[2]: *** [Makefile:1287: prepare0] Error 2 shuffle=1275155403
   make[2]: Target 'prepare' not remade because of errors.
   make[1]: *** [Makefile:234: __sub-make] Error 2 shuffle=1275155403
   make[1]: Target 'prepare' not remade because of errors.
   make: *** [Makefile:234: __sub-make] Error 2 shuffle=1275155403
   make: Target 'prepare' not remade because of errors.


vim +146 arch/arm64/include/asm/ftrace.h

   139	
   140	static __always_inline struct pt_regs *
   141	ftrace_partial_regs(const struct ftrace_regs *fregs, struct pt_regs *regs)
   142	{
   143		memcpy(regs->regs, fregs->regs, sizeof(u64) * 10);
   144		regs->sp = fregs->sp;
   145		regs->pc = fregs->pc;
 > 146		regs->x[29] = fregs->fp;
   147		regs->x[30] = fregs->lr;
   148		return regs;
   149	}
   150	

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