Re: [PATCH v3] vmcoreinfo: Track and log recoverable hardware errors

[Breno Leitao <leitao@debian.org>]

On Wed, Jul 23, 2025 at 10:28:29PM +0800, kernel test robot wrote:
> Hi Breno,
> 
> kernel test robot noticed the following build warnings:
> 
> [auto build test WARNING on 97987520025658f30bb787a99ffbd9bbff9ffc9d]
> 
> url:    https://github.com/intel-lab-lkp/linux/commits/Breno-Leitao/vmcoreinfo-Track-and-log-recoverable-hardware-errors/20250723-005950
> base:   97987520025658f30bb787a99ffbd9bbff9ffc9d
> patch link:    https://lore.kernel.org/r/20250722-vmcore_hw_error-v3-1-ff0683fc1f17%40debian.org
> patch subject: [PATCH v3] vmcoreinfo: Track and log recoverable hardware errors
> config: x86_64-buildonly-randconfig-001-20250723 (https://download.01.org/0day-ci/archive/20250723/202507232209.GrgpSr47-lkp@intel.com/config)
> compiler: gcc-12 (Debian 12.2.0-14+deb12u1) 12.2.0
> reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250723/202507232209.GrgpSr47-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/202507232209.GrgpSr47-lkp@intel.com/
> 
> All warnings (new ones prefixed by >>):
> 
> >> vmlinux.o: warning: objtool: do_machine_check+0x5cc: call to hwerr_log_error_type() leaves .noinstr.text section

Oh, it seems a real issue.

Basically there are two approaches, from what I understand:

	1) mark do_machine_check() as noinstr

	2) Move hwerr_log_error_type() earlier inside the
	instrumentation_begin() area.

Probably option 1 might be more flexible, given that
hwerr_log_error_type() doesn't seem a function that anyone wants to
instrument?!