Re: [PATCH] powerpc/powernv/memtrace: Fix dcache flushing

["Aneesh Kumar K.V" <aneesh.kumar@linux.ibm.com>]

Sandipan Das <sandipan@linux.ibm.com> writes:

> Trace memory is cleared and the corresponding dcache lines
> are flushed after allocation. However, this should not be
> done using the PFN. This adds the missing __va() conversion.

Reviewed-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>

>
> Fixes: 2ac02e5ecec0 ("powerpc/mm: Remove dcache flush from memory remove.")
> Signed-off-by: Sandipan Das <sandipan@linux.ibm.com>
> ---
>  arch/powerpc/platforms/powernv/memtrace.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/arch/powerpc/platforms/powernv/memtrace.c b/arch/powerpc/platforms/powernv/memtrace.c
> index 71c1262589fe..a31f13814f2e 100644
> --- a/arch/powerpc/platforms/powernv/memtrace.c
> +++ b/arch/powerpc/platforms/powernv/memtrace.c
> @@ -104,8 +104,8 @@ static void memtrace_clear_range(unsigned long start_pfn,
>  	 * Before we go ahead and use this range as cache inhibited range
>  	 * flush the cache.
>  	 */
> -	flush_dcache_range_chunked(PFN_PHYS(start_pfn),
> -				   PFN_PHYS(start_pfn + nr_pages),
> +	flush_dcache_range_chunked((unsigned long)__va(PFN_PHYS(start_pfn)),
> +				   (unsigned long)__va(PFN_PHYS(start_pfn + nr_pages)),
>  				   FLUSH_CHUNK_SIZE);
>  }
>  
> -- 
> 2.25.1