[RFC] powerpc: allow allyesconfig to build more

Fixes this build error:

arch/powerpc/kernel/exceptions-64s.S: Assembler messages:
arch/powerpc/kernel/exceptions-64s.S:1312: Error: attempt to move .org backwards

Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
---
 arch/powerpc/kernel/exceptions-64s.S | 20 ++++++++++----------
 1 file changed, 10 insertions(+), 10 deletions(-)

This builds allyesconfig better (we still have RELOC failures in the
link) and hopefully fixes the allmodconfig build, but I don't know if
it is semantically OK.

Stephen Rothwell <sfr@canb.auug.org.au> wrote:

> Fixes this build error:
> 
> arch/powerpc/kernel/exceptions-64s.S: Assembler messages:
> arch/powerpc/kernel/exceptions-64s.S:1312: Error: attempt to move .org backwards
> 
> Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>

Builds and boots for me

Acked-off-by: Michael Neuling <mikey@neuling.org>


> ---
>  arch/powerpc/kernel/exceptions-64s.S | 20 ++++++++++----------
>  1 file changed, 10 insertions(+), 10 deletions(-)
> 
> This builds allyesconfig better (we still have RELOC failures in the
> link) and hopefully fixes the allmodconfig build, but I don't know if
> it is semantically OK.
> 
> diff --git a/arch/powerpc/kernel/exceptions-64s.S b/arch/powerpc/kernel/exceptions-64s.S
> index 38d507306a11..b87859ffc8e7 100644
> --- a/arch/powerpc/kernel/exceptions-64s.S
> +++ b/arch/powerpc/kernel/exceptions-64s.S
> @@ -1294,16 +1294,6 @@ END_FTR_SECTION_IFSET(CPU_FTR_VSX)
>  	.globl	__end_handlers
>  __end_handlers:
>  
> -	/* Equivalents to the above handlers for relocation-on interrupt vectors */
> -	STD_RELON_EXCEPTION_HV_OOL(0xe40, emulation_assist)
> -	MASKABLE_RELON_EXCEPTION_HV_OOL(0xe80, h_doorbell)
> -
> -	STD_RELON_EXCEPTION_PSERIES_OOL(0xf00, performance_monitor)
> -	STD_RELON_EXCEPTION_PSERIES_OOL(0xf20, altivec_unavailable)
> -	STD_RELON_EXCEPTION_PSERIES_OOL(0xf40, vsx_unavailable)
> -	STD_RELON_EXCEPTION_PSERIES_OOL(0xf60, facility_unavailable)
> -	STD_RELON_EXCEPTION_HV_OOL(0xf80, hv_facility_unavailable)
> -
>  #if defined(CONFIG_PPC_PSERIES) || defined(CONFIG_PPC_POWERNV)
>  /*
>   * Data area reserved for FWNMI option.
> @@ -1325,6 +1315,16 @@ fwnmi_data_area:
>  initial_stab:
>  	.space	4096
>  
> +	/* Equivalents to the above handlers for relocation-on interrupt vectors */
> +	STD_RELON_EXCEPTION_HV_OOL(0xe40, emulation_assist)
> +	MASKABLE_RELON_EXCEPTION_HV_OOL(0xe80, h_doorbell)
> +
> +	STD_RELON_EXCEPTION_PSERIES_OOL(0xf00, performance_monitor)
> +	STD_RELON_EXCEPTION_PSERIES_OOL(0xf20, altivec_unavailable)
> +	STD_RELON_EXCEPTION_PSERIES_OOL(0xf40, vsx_unavailable)
> +	STD_RELON_EXCEPTION_PSERIES_OOL(0xf60, facility_unavailable)
> +	STD_RELON_EXCEPTION_HV_OOL(0xf80, hv_facility_unavailable)
> +
>  #ifdef CONFIG_PPC_POWERNV
>  _GLOBAL(opal_mc_secondary_handler)
>  	HMT_MEDIUM_PPR_DISCARD
> -- 
> 1.9.0
> 
> -- 
> Cheers,
> Stephen Rothwell                    sfr@canb.auug.org.au

On Fri, 2014-02-28 at 15:06 +1100, Michael Neuling wrote:
> Stephen Rothwell <sfr@canb.auug.org.au> wrote:
> 
> > Fixes this build error:
> > 
> > arch/powerpc/kernel/exceptions-64s.S: Assembler messages:
> > arch/powerpc/kernel/exceptions-64s.S:1312: Error: attempt to move .org backwards
> > 
> > Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
> 
> Builds and boots for me
> 
> Acked-off-by: Michael Neuling <mikey@neuling.org>
> 

And breaks at least one of my configs (the g5 one) with a relocation
problem in head_64.o (which is why I had modified the original patch to
be less aggressive iirc).

We end up moving things too far away from a conditional branch, I
think the masked_*interrupt stuff. We need to shuffle things a bit
more to get that to work.

Cheers,
Ben.