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

[Vinod Koul]

On Mon, Jan 25, 2016 at 10:29:54AM +0100, Takashi Iwai wrote:
> On Fri, 22 Jan 2016 03:40:45 +0100,
> Stephen Rothwell wrote:
> > 
> > Hi all,
> > 
> > On Fri, 22 Jan 2016 11:24:42 +1100 Stephen Rothwell <sfr@xxxxxxxxxxxxxxxx> wrote:
> > >
> > > On Thu, 21 Jan 2016 07:38:59 +1100 Stephen Rothwell <sfr@xxxxxxxxxxxxxxxx> wrote:
> > > >
> > > > On Wed, 20 Jan 2016 15:09:47 +0100 Takashi Iwai <tiwai@xxxxxxx> 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@xxxxxxxxxxxxxxxx>
> > 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@xxxxxxxxxxxxxxxx>
> > ---
> >  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
> 
> Suppressing this whole is an overreaction, IMO.  It should suffice
> just to disable compile-testing Intel driver.
> How about the patch below?

Takashi,

This wont fix it as we have WM driver using this as well. SND_SOC_WM_ADSP
uses SND_SOC_COMPRESS.

So the better fix would be to do so in either SND_SOC_COMPRESS or even
better in SND_COMPRESS_OFFLOAD..

I think this has been exposed by WM driver as Intel driver depends on X86 so
compress core wouldn't be compiled as none of the drivers select this :)

-- 
Thanks
~Vinod
> 
> 
> thanks,
> 
> Takashi
> 
> -- 8< --
> From: Takashi Iwai <tiwai@xxxxxxx>
> Subject: [PATCH] ASoC: intel: suppress compile-test with PowerPC
> 
> Since some ioctl in compress offload API is broken for PPC (the struct
> size overflows), now we get actually the build error.
> 
> Until we get the proper solution (e.g. alternative ioctl), let's
> disable the build of Intel ASoC driver that is the only driver who
> enables SND_SOC_COMPRESS (and eventually SND_COMPRESS_OFFLOAD) in the
> mainline tree.
> 
> Signed-off-by: Takashi Iwai <tiwai@xxxxxxx>
> ---
>  sound/soc/intel/Kconfig | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/sound/soc/intel/Kconfig b/sound/soc/intel/Kconfig
> index 803f95e40679..d854cd66e090 100644
> --- a/sound/soc/intel/Kconfig
> +++ b/sound/soc/intel/Kconfig
> @@ -31,6 +31,8 @@ config SND_SOC_INTEL_SST
>  	tristate
>  	select SND_SOC_INTEL_SST_ACPI if ACPI
>  	depends on (X86 || COMPILE_TEST)
> +	# FIXME: a part of compress API is broken for PPC
> +	depends on !PPC
>  
>  config SND_SOC_INTEL_SST_ACPI
>  	tristate
> -- 
> 2.7.0
>