[PATCH] powerpc/fsl_booke/32: fix build with CONFIG_RANDOMIZE_BASE

[Christophe Leroy]

Le 13/06/2020 à 18:28, Arseny Solokha a écrit :
> Building the current 5.8 kernel for a e500 machine with
> CONFIG_RANDOMIZE_BASE set yields the following failure:
> 
>    arch/powerpc/mm/nohash/kaslr_booke.c: In function 'kaslr_early_init':
>    arch/powerpc/mm/nohash/kaslr_booke.c:387:2: error: implicit declaration
> of function 'flush_icache_range'; did you mean 'flush_tlb_range'?
> [-Werror=implicit-function-declaration]
> 
> Indeed, including asm/cacheflush.h into kaslr_booke.c fixes the build.
> 
> The issue dates back to the introduction of that file and probably went
> unnoticed because there's no in-tree defconfig with CONFIG_RANDOMIZE_BASE
> set.

I don't get this problem with mpc85xx_defconfig + RELOCATABLE + 
RANDOMIZE_BASE.

Christophe

> 
> Fixes: 2b0e86cc5de6 ("powerpc/fsl_booke/32: implement KASLR infrastructure")
> Cc: stable at vger.kernel.org
> Signed-off-by: Arseny Solokha <asolokha at kb.kras.ru>
> ---
>   arch/powerpc/mm/nohash/kaslr_booke.c | 1 +
>   1 file changed, 1 insertion(+)
> 
> diff --git a/arch/powerpc/mm/nohash/kaslr_booke.c b/arch/powerpc/mm/nohash/kaslr_booke.c
> index 4a75f2d9bf0e..bce0e5349978 100644
> --- a/arch/powerpc/mm/nohash/kaslr_booke.c
> +++ b/arch/powerpc/mm/nohash/kaslr_booke.c
> @@ -14,6 +14,7 @@
>   #include <linux/memblock.h>
>   #include <linux/libfdt.h>
>   #include <linux/crash_core.h>
> +#include <asm/cacheflush.h>
>   #include <asm/pgalloc.h>
>   #include <asm/prom.h>
>   #include <asm/kdump.h>
>