Re: xtensa compiler error triggered by 'locking/lockdep: Implement the 'crossrelease' feature'

[Max Filippov]

On Sun, Sep 10, 2017 at 6:58 PM, Max Filippov <jcmvbkbc@xxxxxxxxx> wrote:
> On Sun, Sep 10, 2017 at 11:31 AM, Guenter Roeck <linux@xxxxxxxxxxxx> wrote:
>> xtensa:allmodconfig fails to build in mainline with compiler errors
>> as follows.
>>
>> drivers/staging/rtl8723bs/core/rtw_ap.c: In function âexpire_timeout_chkâ:
>> drivers/staging/rtl8723bs/core/rtw_ap.c:442:1: internal compiler error:
>>         in change_address_1, at emit-rtl.c:2126
>>
>> drivers/staging/rtl8188eu/core/rtw_ap.c: In function âexpire_timeout_chkâ:
>> drivers/staging/rtl8188eu/core/rtw_ap.c:445:1: internal compiler error:
>>         in change_address_1, at emit-rtl.c:2150
>>
>> I tried gcc 6.3, 6.4, and 7.2; they all have the same problem.
>>
>> Bisect points to commit b09be676e0f ("locking/lockdep: Implement the
>> 'crossrelease' feature").
>>
>> The compile error is still seen if I disable CONFIG_LOCKDEP_CROSSRELEASE.
>> The image builds fine if I disable both CONFIG_RTL8723BS and CONFIG_R8188EU.
>
> Thanks for the report. I'll look at the compiler.

There was a bug in the xtensa gcc backend, now fixed. See
 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82181

-- 
Thanks.
-- Max