Re: clang/objtool failures on linux-next

[Arnd Bergmann]

On Fri, Mar 6, 2026, at 22:17, Josh Poimboeuf wrote:
> On Fri, Mar 06, 2026 at 10:02:54PM +0100, Arnd Bergmann wrote:
>> 
>> drivers/gpu/drm/amd/amdgpu/amdgpu_cs.o: warning: objtool: amdgpu_cs_parser_bos+0x723: unreachable instruction
>> drivers/gpu/drm/msm/msm.o: warning: objtool: msm_gem_vm_close+0x1cf: unreachable instruction
>> drivers/gpu/drm/panthor/panthor.o: warning: objtool: panthor_ioctl_vm_bind+0x32b: __stack_chk_fail() missing __noreturn in .c/.h or NORETURN() in noreturns.h
>> drivers/gpu/drm/panthor/panthor.o: warning: objtool: panthor_ioctl_vm_bind_async+0x285: unreachable instruction
>> drivers/gpu/drm/panthor/panthor_drv.o: warning: objtool: panthor_ioctl_vm_bind+0x2df: unreachable instruction
>> drivers/gpu/drm/xe/xe_bo.o: warning: objtool: xe_bo_create_pin_map_at_novm+0x11d: unreachable instruction
>> drivers/iio/imu/bmi160/bmi160_core.o: warning: objtool: bmi160_setup_irq() falls through to next function __cfi_bmi160_core_runtime_resume()
>> kernel/bpf/core.o: warning: objtool: ___bpf_prog_run+0x217: sibling call from callable instruction with modified stack frame
>> sound/soc/codecs/wcd9335.o: warning: objtool: wcd9335_slimbus_irq() falls through to next function __cfi_wcd9335_set_channel_map()
>> vmlinux.o: warning: objtool: ___bpf_prog_run+0x1d4: sibling call from callable instruction with modified stack frame
>> vmlinux.o: warning: objtool: hdmi_power_on_full.isra.0+0xd6: hdmi_pll_compute() missing __noreturn in .c/.h or NORETURN() in noreturns.h
>> 
>> If you want to investigate those, I can send you the configs and/or
>> object files for these as well.
>
> Yes, please send those and I'll take a look.  Thanks!

These are the ones I could easily reproduce on today's linux-next:

==> build/x86/0xCE0DD5F4_defconfig/log <==
vmlinux.o: warning: objtool: ___bpf_prog_run+0x1c5: sibling call from callable instruction with modified stack frame

==> build/x86/0x8FD83285_defconfig/log <==
drivers/gpu/drm/amd/amdgpu/amdgpu_cs.o: warning: objtool: amdgpu_cs_parser_bos+0x723: unreachable instruction
drivers/gpu/drm/xe/xe_bo.o: warning: objtool: xe_bo_create_pin_map_at_novm+0x11d: unreachable instruction
drivers/gpu/drm/panthor/panthor_drv.o: warning: objtool: panthor_ioctl_vm_bind+0x2df: unreachable instruction
drivers/iio/imu/bmi160/bmi160_core.o: warning: objtool: bmi160_setup_irq() falls through to next function __cfi_bmi160_core_runtime_resume()

==> build/x86/0x4DF22811_defconfig/log <==
sound/soc/codecs/wcd9335.o: warning: objtool: wcd9335_slimbus_irq() falls through to next function __cfi_wcd9335_set_channel_map()

     Arnd

Attachment: objtool-warnings.tar.gz
Description: application/gzip