linux-kernel - Re: h8300 build failures in linux-next (in rcu code, gcc 5.x related, not limited to h8300)

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Message-ID: <20150825162312.GA7098@redhat.com>
Date:	Tue, 25 Aug 2015 18:23:12 +0200
From:	Oleg Nesterov <oleg@...hat.com>
To:	Guenter Roeck <linux@...ck-us.net>
Cc:	Mark Salter <msalter@...hat.com>,
	Yoshinori Sato <ysato@...rs.sourceforge.jp>,
	uclinux-h8-devel@...ts.sourceforge.jp,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"Peter Zijlstra (Intel)" <peterz@...radead.org>,
	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>,
	Josh Triplett <josh@...htriplett.org>
Subject: Re: h8300 build failures in linux-next (in rcu code, gcc 5.x
	related, not limited to h8300)

On 08/25, Oleg Nesterov wrote:
>
> OK, this is gcc bug. But we probably need the workaround, and I don't
> have a h8300 machine so I can't test the fix.
>
> Could you please try to compile kernel/rcu/sync.o with the patch below?
> Just to know how "stable" this bug is. I expect the compilation should
> fail again, rcutiny.h:rcu_barrier() is "inline" too.

Wait, I reproduced the same problem on x86. Thanks.

Oleg.

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