linux-kernel - Re: linux-next: build failure after merge of the akpm tree

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Date:	Fri, 22 Jan 2016 13:40:45 +1100
From:	Stephen Rothwell <sfr@...b.auug.org.au>
To:	Takashi Iwai <tiwai@...e.de>
Cc:	Vinod Koul <vinod.koul@...ux.intel.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-next@...r.kernel.org, linux-kernel@...r.kernel.org,
	Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>
Subject: Re: linux-next: build failure after merge of the akpm tree

Hi all,

On Fri, 22 Jan 2016 11:24:42 +1100 Stephen Rothwell <sfr@...b.auug.org.au> wrote:
>
> On Thu, 21 Jan 2016 07:38:59 +1100 Stephen Rothwell <sfr@...b.auug.org.au> wrote:
> >
> > On Wed, 20 Jan 2016 15:09:47 +0100 Takashi Iwai <tiwai@...e.de> wrote:  
> > >
> > > On Sat, 16 Jan 2016 09:51:29 +0100,
> > > Takashi Iwai wrote:    
> > > > 
> > > > There are a few ways to fix this, but all are not comfortable.
> > > > 
> > > > A. Disable compress API for powerpc.    
> > 
> > This also affects alpha, mips and (maybe) sparc.  
> 
> This was exposed on PowerPC by commit bf76f73c5f65 ("powerpc: enable
> UBSAN support") which is in Linus' tree as of this morning.  The only
> relevant change that made was in the compiler flags (I tested this by
> building the file without that commit but with these new compiler flags:
> 
> -fsanitize=shift -fsanitize=integer-divide-by-zero
> -fsanitize=unreachable -fsanitize=vla-bound -fsanitize=null
> -fsanitize=signed-integer-overflow -fsanitize=bounds
> -fsanitize=object-size -fsanitize=returns-nonnull-attribute
> -fsanitize=bool -fsanitize=enum -fsanitize=alignment
> 
> The preprocessed file is the same in both cases, but with these flags
> the compiler errors.

So for now I have suppressed the error using the following patch (which
I will keep in my fixes tree until some other fix is applied):

From: Stephen Rothwell <sfr@...b.auug.org.au>
Date: Fri, 22 Jan 2016 13:24:57 +1100
Subject: [PATCH] next: suppress the building of all the sound codecs on PPC
 for now

Signed-off-by: Stephen Rothwell <sfr@...b.auug.org.au>
---
 sound/soc/codecs/Kconfig | 1 +
 1 file changed, 1 insertion(+)

diff --git a/sound/soc/codecs/Kconfig b/sound/soc/codecs/Kconfig
index 50693c867e71..ee5f36b9c787 100644
--- a/sound/soc/codecs/Kconfig
+++ b/sound/soc/codecs/Kconfig
@@ -13,6 +13,7 @@ menu "CODEC drivers"
 config SND_SOC_ALL_CODECS
 	tristate "Build all ASoC CODEC drivers"
 	depends on COMPILE_TEST
+	depends on !PPC
 	select SND_SOC_88PM860X if MFD_88PM860X
 	select SND_SOC_L3
 	select SND_SOC_AB8500_CODEC if ABX500_CORE
-- 
2.6.4

-- 
Cheers,
Stephen Rothwell                    sfr@...b.auug.org.au