[PATCH] Disable kcov for slb routines.

[Satheesh Rajendran]

On Mon, Mar 04, 2019 at 01:55:51PM +0530, Mahesh J Salgaonkar wrote:
> From: Mahesh Salgaonkar <mahesh at linux.vnet.ibm.com>
> 
> The kcov instrumentation inside SLB routines causes duplicate SLB entries
> to be added resulting into SLB multihit machine checks.
> Disable kcov instrumentation on slb.o
> 
> Signed-off-by: Mahesh Salgaonkar <mahesh at linux.vnet.ibm.com>
> ---
>  arch/powerpc/mm/Makefile |    1 +
>  1 file changed, 1 insertion(+)

Fixes: https://github.com/linuxppc/issues/issues/230

Tested-by: Satheesh Rajendran <sathnaga at linux.vent.ibm.com>

> 
> diff --git a/arch/powerpc/mm/Makefile b/arch/powerpc/mm/Makefile
> index d4d32e229ace..f9cb40684746 100644
> --- a/arch/powerpc/mm/Makefile
> +++ b/arch/powerpc/mm/Makefile
> @@ -60,3 +60,4 @@ obj-$(CONFIG_PPC_MEM_KEYS)	+= pkeys.o
>  # This is necessary for booting with kcov enabled on book3e machines
>  KCOV_INSTRUMENT_tlb_nohash.o := n
>  KCOV_INSTRUMENT_fsl_booke_mmu.o := n
> +KCOV_INSTRUMENT_slb.o := n
>