linux-kernel - Re: randconfig build error with next-20150529, in crypto/jitterentropy.c

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Message-ID: <1702795.h60qkgijGA@tauon.atsec.com>
Date:	Tue, 09 Jun 2015 01:33:12 +0200
From:	Stephan Mueller <smueller@...onox.de>
To:	Guenter Roeck <linux@...ck-us.net>
Cc:	Andy Shevchenko <andy.shevchenko@...il.com>,
	Jim Davis <jim.epost@...il.com>,
	Stephen Rothwell <sfr@...b.auug.org.au>,
	linux-next <linux-next@...r.kernel.org>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	Herbert Xu <herbert@...dor.apana.org.au>,
	"David S. Miller" <davem@...emloft.net>,
	linux-crypto <linux-crypto@...r.kernel.org>
Subject: Re: randconfig build error with next-20150529, in crypto/jitterentropy.c

Am Monday 08 June 2015, 16:30:09 schrieb Guenter Roeck:

Hi Guenter,

>
>get_cycles is implemented as static inline which executes mfspr(SPR_TTCR).
>SPR_TTCR is a constant. Normally that information seems to be passed on,
>but not when get_cycles() is compiled through jitterentropy.
>
>Any idea what might cause this ?

Then it may be the optimization issue as well that Peter indicated. May I ask 
you for testing purposes (I do not have an OpenRISC) to remove the following 
line from crypto/Makefile:

CFLAGS_jitterentropy.o = -O0

Note, that should just serve for testing. I will post a patch later that will 
replace the -O0 statement with a pragma.

Thanks a lot.
>
>Thanks,
>Guenter


Ciao
Stephan
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