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

[Dirk Behme]

On 13.03.2012 02:24, Eric Nelson wrote:
> On 03/04/2012 02:46 PM, Eric Nelson wrote:
>> Signed-off-by: Eric Nelson<eric.nelson at boundarydevices.com>
>> Acked-by: Mike Frysinger<vapier at 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.

Anybody likes to comment/apply this patch?

Many thanks!

Dirk