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

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Message-ID: <CAMo8BfK3ryJkZFpJMkRJc-xYA3vnwL8o5a+M2=fSWEMLgfTTAA@mail.gmail.com>
Date:   Sun, 10 Sep 2017 18:58:33 -0700
From:   Max Filippov <jcmvbkbc@...il.com>
To:     Guenter Roeck <linux@...ck-us.net>
Cc:     Byungchul Park <byungchul.park@....com>,
        Peter Zijlstra <peterz@...radead.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Chris Zankel <chris@...kel.net>,
        "linux-xtensa@...ux-xtensa.org" <linux-xtensa@...ux-xtensa.org>
Subject: Re: xtensa compiler error triggered by 'locking/lockdep: Implement
 the 'crossrelease' feature'

On Sun, Sep 10, 2017 at 11:31 AM, Guenter Roeck <linux@...ck-us.net> wrote:
> xtensa:allmodconfig fails to build in mainline with compiler errors
> as follows.
>
> drivers/staging/rtl8723bs/core/rtw_ap.c: In function ‘expire_timeout_chk’:
> 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 ‘expire_timeout_chk’:
> 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.

-- 
Thanks.
-- Max