From mboxrd@z Thu Jan  1 00:00:00 1970
From: Stephan Mueller <smueller@chronox.de>
Subject: Re: #pragma GCC warnings (was: Re: [PATCH] crypto: drbg - use pragmas for disabling optimization)
Date: Tue, 23 Jun 2015 11:45:29 +0200
Message-ID: <2009251.BuUdnce5se@tauon.atsec.com>
References: <CAMuHMdXLDeqSU3WcVEh=jcGdS4z2YMejU_nZ2gDObDVjsm7vvw@mail.gmail.com> <20150623092106.GA18791@gondor.apana.org.au>
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To: Herbert Xu <herbert@gondor.apana.org.au>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>, Guenter Roeck <linux@roeck-us.net>, Peter Zijlstra <public-peterz-wegcikhe2lqwvfeawa7xhq@plane.gmane.org>, Andy Shevchenko <andy.shevchenko@gmail.com>, Jim Davis <jim.epost@gmail.com>, Stephen Rothwell <sfr@canb.auug.org.au>, Linux-Next <linux-next@vger.kernel.org>, "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>, "David S. Miller" <davem@davemloft.net>, linux-crypto@vger.kernel.org, Waiman Long <waiman.long@hp.com>, Ingo Molnar <mingo@kernel.org>, x86 <x86@kernel.org>
List-Id: linux-next.vger.kernel.org

Am Dienstag, 23. Juni 2015, 17:21:06 schrieb Herbert Xu:

Hi Herbert,

>On Tue, Jun 23, 2015 at 11:17:23AM +0200, Geert Uytterhoeven wrote:
>> I get that too with m68k-linux-gcc-4.6.3 and m68k-linux-gcc-4.9.0.
>> 
>> With m68k-linux-gnu-gcc-4.1, which is still my default cross-compiler due
>> to the good unused warning reporting, I get:
>> 
>> crypto/jitterentropy.c:235: warning: ignoring #pragma GCC push_options
>> crypto/jitterentropy.c:236: warning: ignoring #pragma GCC optimize
>> crypto/jitterentropy.c:266: warning: ignoring #pragma GCC pop_options
>> crypto/jitterentropy.c:295: warning: ignoring #pragma GCC push_options
>> crypto/jitterentropy.c:296: warning: ignoring #pragma GCC optimize
>> crypto/jitterentropy.c:336: warning: ignoring #pragma GCC pop_options
>> crypto/jitterentropy.c:385: warning: ignoring #pragma GCC push_options
>> crypto/jitterentropy.c:386: warning: ignoring #pragma GCC optimize
>> crypto/jitterentropy.c:416: warning: ignoring #pragma GCC pop_options
>> crypto/jitterentropy.c:517: warning: ignoring #pragma GCC push_options
>> crypto/jitterentropy.c:518: warning: ignoring #pragma GCC optimize
>> crypto/jitterentropy.c:580: warning: ignoring #pragma GCC pop_options
>
>Stephan, could you look into moving the relevant functions into
>its own file which can then be compiled with -O0? Obviously any
>dependency on kernel header files would have to be hidden using
>functions outside of this file.

I will look into it.

Thanks

Ciao
Stephan