[pci:pci/resource 5/8] drivers/pci/of.o: warning: objtool: of_pci_map_rid.cold.1()+0x20: call without frame pointer save/setup

[pci:pci/resource 5/8] drivers/pci/of.o: warning: objtool: of_pci_map_rid.cold.1()+0x20: call without frame pointer save/setup

[kbuild test robot]

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tree:   https://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci.git pci/resource
head:   ae5dab4220cf9ef3e7ecd6d520ab3a5750bb0eb6
commit: bdf501f350aaa3432e4c85d4f8f57f6aa7bc9c1d [5/8] PCI: Use dev_printk() in of_pci_get_host_bridge_resources()
config: x86_64-randconfig-x004-201821 (attached as .config)
compiler: gcc-8 (Debian 8.1.0-3) 8.1.0
reproduce:
        git checkout bdf501f350aaa3432e4c85d4f8f57f6aa7bc9c1d
        # save the attached .config to linux build tree
        make ARCH=x86_64 

All warnings (new ones prefixed by >>):

   drivers/pci/of.o: warning: objtool: of_pci_check_probe_only()+0x8e: sibling call from callable instruction with modified stack frame
   drivers/pci/of.o: warning: objtool: of_pci_map_rid()+0x134: sibling call from callable instruction with modified stack frame
   drivers/pci/of.o: warning: objtool: of_irq_parse_and_map_pci()+0x1f8: sibling call from callable instruction with modified stack frame
   drivers/pci/of.o: warning: objtool: of_pci_check_probe_only.cold.0()+0x17: call without frame pointer save/setup
>> drivers/pci/of.o: warning: objtool: of_pci_map_rid.cold.1()+0x20: call without frame pointer save/setup
   drivers/pci/of.o: warning: objtool: of_irq_parse_and_map_pci.cold.2()+0x15: call without frame pointer save/setup

---
0-DAY kernel test infrastructure                Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all                   Intel Corporation

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Re: [pci:pci/resource 5/8] drivers/pci/of.o: warning: objtool: of_pci_map_rid.cold.1()+0x20: call without frame pointer save/setup

[Jan Kiszka]

On 2018-05-29 19:09, kbuild test robot wrote:
> tree:   https://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci.git pci/resource
> head:   ae5dab4220cf9ef3e7ecd6d520ab3a5750bb0eb6
> commit: bdf501f350aaa3432e4c85d4f8f57f6aa7bc9c1d [5/8] PCI: Use dev_printk() in of_pci_get_host_bridge_resources()
> config: x86_64-randconfig-x004-201821 (attached as .config)
> compiler: gcc-8 (Debian 8.1.0-3) 8.1.0
> reproduce:
>         git checkout bdf501f350aaa3432e4c85d4f8f57f6aa7bc9c1d
>         # save the attached .config to linux build tree
>         make ARCH=x86_64 
> 
> All warnings (new ones prefixed by >>):
> 
>    drivers/pci/of.o: warning: objtool: of_pci_check_probe_only()+0x8e: sibling call from callable instruction with modified stack frame
>    drivers/pci/of.o: warning: objtool: of_pci_map_rid()+0x134: sibling call from callable instruction with modified stack frame
>    drivers/pci/of.o: warning: objtool: of_irq_parse_and_map_pci()+0x1f8: sibling call from callable instruction with modified stack frame
>    drivers/pci/of.o: warning: objtool: of_pci_check_probe_only.cold.0()+0x17: call without frame pointer save/setup
>>> drivers/pci/of.o: warning: objtool: of_pci_map_rid.cold.1()+0x20: call without frame pointer save/setup
>    drivers/pci/of.o: warning: objtool: of_irq_parse_and_map_pci.cold.2()+0x15: call without frame pointer save/setup
> 

Can someone enlighten me what that means? And I don't see how this patch
could directly contribute to it.

Thanks,
Jan

-- 
Siemens AG, Corporate Technology, CT RDA IOT SES-DE
Corporate Competence Center Embedded Linux

RE: [kbuild-all] [pci:pci/resource 5/8] drivers/pci/of.o: warning: objtool: of_pci_map_rid.cold.1()+0x20: call without frame pointer save/setup

[Li, Philip]

>=20
> On 2018-05-29 19:09, kbuild test robot wrote:
> > tree:   https://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci.git=
 pci/resource
> > head:   ae5dab4220cf9ef3e7ecd6d520ab3a5750bb0eb6
> > commit: bdf501f350aaa3432e4c85d4f8f57f6aa7bc9c1d [5/8] PCI: Use
> dev_printk() in of_pci_get_host_bridge_resources()
> > config: x86_64-randconfig-x004-201821 (attached as .config)
> > compiler: gcc-8 (Debian 8.1.0-3) 8.1.0
> > reproduce:
> >         git checkout bdf501f350aaa3432e4c85d4f8f57f6aa7bc9c1d
> >         # save the attached .config to linux build tree
> >         make ARCH=3Dx86_64
> >
> > All warnings (new ones prefixed by >>):
> >
> >    drivers/pci/of.o: warning: objtool: of_pci_check_probe_only()+0x8e: =
sibling
> call from callable instruction with modified stack frame
> >    drivers/pci/of.o: warning: objtool: of_pci_map_rid()+0x134: sibling =
call from
> callable instruction with modified stack frame
> >    drivers/pci/of.o: warning: objtool: of_irq_parse_and_map_pci()+0x1f8=
: sibling
> call from callable instruction with modified stack frame
> >    drivers/pci/of.o: warning: objtool: of_pci_check_probe_only.cold.0()=
+0x17: call
> without frame pointer save/setup
> >>> drivers/pci/of.o: warning: objtool: of_pci_map_rid.cold.1()+0x20: cal=
l without
> frame pointer save/setup
> >    drivers/pci/of.o: warning: objtool: of_irq_parse_and_map_pci.cold.2(=
)+0x15:
> call without frame pointer save/setup
> >
>=20
> Can someone enlighten me what that means? And I don't see how this patch
> could directly contribute to it.
Hi Jan, allow us to double check this since we upgrade gcc to 8.1 which may=
 bring
some different warnings/issues. You can kindly ignore this for now.

>=20
> Thanks,
> Jan
>=20
> --
> Siemens AG, Corporate Technology, CT RDA IOT SES-DE
> Corporate Competence Center Embedded Linux
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