* arch/x86/mm/fault.o: warning: objtool: do_page_fault()+0x4fb: unreachable instruction
@ 2020-03-06 10:48 ` kbuild test robot
0 siblings, 0 replies; 6+ messages in thread
From: kbuild test robot @ 2020-03-06 10:48 UTC (permalink / raw)
To: Frederic Weisbecker; +Cc: kbuild-all, linux-kernel, Ingo Molnar
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tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: 9f65ed5fe41ce08ed1cb1f6a950f9ec694c142ad
commit: ee6352b2c47a24234398e06381edd93a8e965976 x86/context-tracking: Remove exception_enter/exit() from do_page_fault()
date: 8 weeks ago
config: x86_64-randconfig-a002-20200306 (attached as .config)
compiler: gcc-4.9 (Debian 4.9.2-10+deb8u1) 4.9.2
reproduce:
git checkout ee6352b2c47a24234398e06381edd93a8e965976
# save the attached .config to linux build tree
make ARCH=x86_64
If you fix the issue, kindly add following tag
Reported-by: kbuild test robot <lkp@intel.com>
All warnings (new ones prefixed by >>):
>> arch/x86/mm/fault.o: warning: objtool: do_page_fault()+0x4fb: unreachable instruction
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org
[-- Attachment #2: .config.gz --]
[-- Type: application/gzip, Size: 31008 bytes --]
^ permalink raw reply [flat|nested] 6+ messages in thread* arch/x86/mm/fault.o: warning: objtool: do_page_fault()+0x4fb: unreachable instruction
@ 2020-03-06 10:48 ` kbuild test robot
0 siblings, 0 replies; 6+ messages in thread
From: kbuild test robot @ 2020-03-06 10:48 UTC (permalink / raw)
To: kbuild-all
[-- Attachment #1: Type: text/plain, Size: 902 bytes --]
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: 9f65ed5fe41ce08ed1cb1f6a950f9ec694c142ad
commit: ee6352b2c47a24234398e06381edd93a8e965976 x86/context-tracking: Remove exception_enter/exit() from do_page_fault()
date: 8 weeks ago
config: x86_64-randconfig-a002-20200306 (attached as .config)
compiler: gcc-4.9 (Debian 4.9.2-10+deb8u1) 4.9.2
reproduce:
git checkout ee6352b2c47a24234398e06381edd93a8e965976
# save the attached .config to linux build tree
make ARCH=x86_64
If you fix the issue, kindly add following tag
Reported-by: kbuild test robot <lkp@intel.com>
All warnings (new ones prefixed by >>):
>> arch/x86/mm/fault.o: warning: objtool: do_page_fault()+0x4fb: unreachable instruction
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all(a)lists.01.org
[-- Attachment #2: config.gz --]
[-- Type: application/gzip, Size: 31008 bytes --]
^ permalink raw reply [flat|nested] 6+ messages in thread* Re: arch/x86/mm/fault.o: warning: objtool: do_page_fault()+0x4fb: unreachable instruction
2020-03-06 10:48 ` kbuild test robot
@ 2020-03-06 14:27 ` Frederic Weisbecker
-1 siblings, 0 replies; 6+ messages in thread
From: Frederic Weisbecker @ 2020-03-06 14:27 UTC (permalink / raw)
To: kbuild test robot; +Cc: kbuild-all, linux-kernel, Ingo Molnar
On Fri, Mar 06, 2020 at 06:48:47PM +0800, kbuild test robot wrote:
> tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
> head: 9f65ed5fe41ce08ed1cb1f6a950f9ec694c142ad
> commit: ee6352b2c47a24234398e06381edd93a8e965976 x86/context-tracking: Remove exception_enter/exit() from do_page_fault()
> date: 8 weeks ago
> config: x86_64-randconfig-a002-20200306 (attached as .config)
> compiler: gcc-4.9 (Debian 4.9.2-10+deb8u1) 4.9.2
> reproduce:
> git checkout ee6352b2c47a24234398e06381edd93a8e965976
> # save the attached .config to linux build tree
> make ARCH=x86_64
>
> If you fix the issue, kindly add following tag
> Reported-by: kbuild test robot <lkp@intel.com>
>
> All warnings (new ones prefixed by >>):
>
> >> arch/x86/mm/fault.o: warning: objtool: do_page_fault()+0x4fb: unreachable instruction
I tried several versions of gcc and I can't reproduce the warning. Also looking
at the code I fail to find an actual unreachable path. Do you still have the vmlinux around?
Thanks.
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: arch/x86/mm/fault.o: warning: objtool: do_page_fault()+0x4fb: unreachable instruction
@ 2020-03-06 14:27 ` Frederic Weisbecker
0 siblings, 0 replies; 6+ messages in thread
From: Frederic Weisbecker @ 2020-03-06 14:27 UTC (permalink / raw)
To: kbuild-all
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On Fri, Mar 06, 2020 at 06:48:47PM +0800, kbuild test robot wrote:
> tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
> head: 9f65ed5fe41ce08ed1cb1f6a950f9ec694c142ad
> commit: ee6352b2c47a24234398e06381edd93a8e965976 x86/context-tracking: Remove exception_enter/exit() from do_page_fault()
> date: 8 weeks ago
> config: x86_64-randconfig-a002-20200306 (attached as .config)
> compiler: gcc-4.9 (Debian 4.9.2-10+deb8u1) 4.9.2
> reproduce:
> git checkout ee6352b2c47a24234398e06381edd93a8e965976
> # save the attached .config to linux build tree
> make ARCH=x86_64
>
> If you fix the issue, kindly add following tag
> Reported-by: kbuild test robot <lkp@intel.com>
>
> All warnings (new ones prefixed by >>):
>
> >> arch/x86/mm/fault.o: warning: objtool: do_page_fault()+0x4fb: unreachable instruction
I tried several versions of gcc and I can't reproduce the warning. Also looking
at the code I fail to find an actual unreachable path. Do you still have the vmlinux around?
Thanks.
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [kbuild-all] Re: arch/x86/mm/fault.o: warning: objtool: do_page_fault()+0x4fb: unreachable instruction
2020-03-06 14:27 ` Frederic Weisbecker
@ 2020-03-09 8:37 ` Rong Chen
-1 siblings, 0 replies; 6+ messages in thread
From: Rong Chen @ 2020-03-09 8:37 UTC (permalink / raw)
To: Frederic Weisbecker, kbuild test robot
Cc: kbuild-all, linux-kernel, Ingo Molnar
On 3/6/20 10:27 PM, Frederic Weisbecker wrote:
> On Fri, Mar 06, 2020 at 06:48:47PM +0800, kbuild test robot wrote:
>> tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
>> head: 9f65ed5fe41ce08ed1cb1f6a950f9ec694c142ad
>> commit: ee6352b2c47a24234398e06381edd93a8e965976 x86/context-tracking: Remove exception_enter/exit() from do_page_fault()
>> date: 8 weeks ago
>> config: x86_64-randconfig-a002-20200306 (attached as .config)
>> compiler: gcc-4.9 (Debian 4.9.2-10+deb8u1) 4.9.2
>> reproduce:
>> git checkout ee6352b2c47a24234398e06381edd93a8e965976
>> # save the attached .config to linux build tree
>> make ARCH=x86_64
>>
>> If you fix the issue, kindly add following tag
>> Reported-by: kbuild test robot <lkp@intel.com>
>>
>> All warnings (new ones prefixed by >>):
>>
>>>> arch/x86/mm/fault.o: warning: objtool: do_page_fault()+0x4fb: unreachable instruction
> I tried several versions of gcc and I can't reproduce the warning. Also looking
> at the code I fail to find an actual unreachable path. Do you still have the vmlinux around?
>
>
Hi Frederic,
Sorry for the inconvenience, we checked again and only found this issue
on gcc-4.9.2,
and there's no issue on gcc-4.9.3 or other new versions.
Best Regards,
Rong Chen
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: arch/x86/mm/fault.o: warning: objtool: do_page_fault()+0x4fb: unreachable instruction
@ 2020-03-09 8:37 ` Rong Chen
0 siblings, 0 replies; 6+ messages in thread
From: Rong Chen @ 2020-03-09 8:37 UTC (permalink / raw)
To: kbuild-all
[-- Attachment #1: Type: text/plain, Size: 1329 bytes --]
On 3/6/20 10:27 PM, Frederic Weisbecker wrote:
> On Fri, Mar 06, 2020 at 06:48:47PM +0800, kbuild test robot wrote:
>> tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
>> head: 9f65ed5fe41ce08ed1cb1f6a950f9ec694c142ad
>> commit: ee6352b2c47a24234398e06381edd93a8e965976 x86/context-tracking: Remove exception_enter/exit() from do_page_fault()
>> date: 8 weeks ago
>> config: x86_64-randconfig-a002-20200306 (attached as .config)
>> compiler: gcc-4.9 (Debian 4.9.2-10+deb8u1) 4.9.2
>> reproduce:
>> git checkout ee6352b2c47a24234398e06381edd93a8e965976
>> # save the attached .config to linux build tree
>> make ARCH=x86_64
>>
>> If you fix the issue, kindly add following tag
>> Reported-by: kbuild test robot <lkp@intel.com>
>>
>> All warnings (new ones prefixed by >>):
>>
>>>> arch/x86/mm/fault.o: warning: objtool: do_page_fault()+0x4fb: unreachable instruction
> I tried several versions of gcc and I can't reproduce the warning. Also looking
> at the code I fail to find an actual unreachable path. Do you still have the vmlinux around?
>
>
Hi Frederic,
Sorry for the inconvenience, we checked again and only found this issue
on gcc-4.9.2,
and there's no issue on gcc-4.9.3 or other new versions.
Best Regards,
Rong Chen
^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2020-03-09 8:37 UTC | newest]
Thread overview: 6+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2020-03-06 10:48 arch/x86/mm/fault.o: warning: objtool: do_page_fault()+0x4fb: unreachable instruction kbuild test robot
2020-03-06 10:48 ` kbuild test robot
2020-03-06 14:27 ` Frederic Weisbecker
2020-03-06 14:27 ` Frederic Weisbecker
2020-03-09 8:37 ` [kbuild-all] " Rong Chen
2020-03-09 8:37 ` Rong Chen
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