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

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Message-ID: <55762A7C.5050706@roeck-us.net>
Date:	Mon, 08 Jun 2015 16:51:24 -0700
From:	Guenter Roeck <linux@...ck-us.net>
To:	Stephan Mueller <smueller@...onox.de>
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

On 06/08/2015 04:33 PM, Stephan Mueller wrote:
> 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
>

Yes, that fixes the problem (after I also removed the associated #error from
jitterentropy.c).

Guenter

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