[U-Boot] [PATCH V2] fs/fat: align disk buffers on cache line to enable DMA and cache

[Eric Nelson <eric.nelson@boundarydevices.com>]

On 03/04/2012 02:46 PM, Eric Nelson wrote:
> Signed-off-by: Eric Nelson<eric.nelson@boundarydevices.com>
> Acked-by: Mike Frysinger<vapier@gentoo.org>
> ---
>   fs/fat/fat.c |   14 ++++++++------
>   1 files changed, 8 insertions(+), 6 deletions(-)
>
> diff --git a/fs/fat/fat.c b/fs/fat/fat.c
> index 1f95eb4..f3c48bb 100644
> --- a/fs/fat/fat.c
> +++ b/fs/fat/fat.c
> @@ -31,6 +31,8 @@
>   #include<fat.h>
>   #include<asm/byteorder.h>
>   #include<part.h>
> +#include<malloc.h>
> +#include<linux/compiler.h>
>
>   /*
>    * Convert a string to lowercase.
> @@ -62,7 +64,7 @@ static int disk_read(__u32 block, __u32 nr_blocks, void *buf)
>
>   int fat_register_device (block_dev_desc_t * dev_desc, int part_no)
>   {
> -	unsigned char buffer[dev_desc->blksz];
> +	ALLOC_CACHE_ALIGN_BUFFER(unsigned char, buffer, dev_desc->blksz);
 > <snip>

Hi Wolfgang,

Have you had a chance to review this patch? Is there another maintainer for fs/fat?

Please let me know if you need this updated.

There's another patch that was acked by Mike but is otherwise lingering here:

	http://lists.denx.de/pipermail/u-boot/2012-March/119309.html

Both of these are needed before enabling the data cache on i.MX6 when using
the FAT filesystem.

Regards,


Eric