Re: [linux-next:master 3022/4739] drivers/gpu/drm/msm/msm.o: warning: objtool: msm_dp_ctrl_on_stream(): unexpected end of section .text.msm_dp_ctrl_on_stream

[Philip Li <philip.li@intel.com>]

On Wed, Jul 02, 2025 at 02:44:59PM -0700, Nathan Chancellor wrote:
> + Dmitry's @kernel.org address, should these reports use .mailmap from
> mainline to ensure they get sent to up to date addresses?

Thanks Nathan, I will update the bot to use the correct address from the latest
.mailmap.

> 
> On Wed, Jul 02, 2025 at 02:37:16PM -0700, Nathan Chancellor wrote:
> > On Wed, Jun 25, 2025 at 10:16:55AM +0800, kernel test robot wrote:
> > > tree:   https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
> > > head:   2ae2aaafb21454f4781c30734959cf223ab486ef
> > > commit: 8583a655f2c2bb442e2a2668680f419aa4c511d1 [3022/4739] drm/msm/dp: move/inline ctrl register functions
> > > config: x86_64-buildonly-randconfig-005-20250625 (https://download.01.org/0day-ci/archive/20250625/202506251051.7rmus46j-lkp@intel.com/config)
> > > compiler: clang version 20.1.7 (https://github.com/llvm/llvm-project 6146a88f60492b520a36f8f8f3231e15f3cc6082)
> > > reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250625/202506251051.7rmus46j-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/202506251051.7rmus46j-lkp@intel.com/
> > > 
> > > All warnings (new ones prefixed by >>):
> > > 
> > > >> drivers/gpu/drm/msm/msm.o: warning: objtool: msm_dp_ctrl_on_stream(): unexpected end of section .text.msm_dp_ctrl_on_stream
> > 
> > This appears to be a case similar to [1] and [2], where clang has been
> > able to figure out that there will be a divide by zero in the else
> > branch of msm_dp_ctrl_config_msa(). Should pixel_div be adjusted to 1 or
> > should the divide by zero be avoided by returning early? I believe Bill
> > is still looking into trying to make this less distructive in LLVM but
> > it should still probably be fixed for LLVM 20, which is already
> > released.
> > 
> > [1]: https://lore.kernel.org/CAHk-=wiq=E0fwJLFpCc3wPY_9BPZF3dbdqGgVoOmK9Ykj5JEeg@mail.gmail.com/
> > [2]: https://lore.kernel.org/20250609213505.GA1634981@ax162/
> > 
> > Cheers,
> > Nathan
> > 
>