Subject: [Linaro-mm-sig] [PATCH] ARM: LPAE: fix access flag setup in mem_type_table

From: [email-masked] (Marek Szyprowski)
Date: Tue, 15 May 2012 22:51:27 +0200

Hello,

On 5/15/2012 2:22 PM, Russell King - ARM Linux wrote:
> On Mon, May 14, 2012 at 01:54:57PM -0400, Vitaly Andrianov wrote:
>> A zero value for prot_sect in the memory types table implies that
>> section mappings should never be created for the memory type in question.
>> This is checked for in alloc_init_section().
>>
>> With LPAE, we set a bit to mask access flag faults for kernel mappings.
>> This breaks the aforementioned (!prot_sect) check in alloc_init_section().
>>
>> This patch fixes this bug by first checking for a non-zero
>> prot_sect before setting the PMD_SECT_AF flag.
>>
>> Signed-off-by: Vitaly Andrianov<[email-masked]>
>>
>> Acked-by: Catalin Marinas<[email-masked]>
>
> Please put this in the patch system.  No blank line is needed between
> s-off-by and acked-by.

This patch fixes the issue introduced by adding CMA to ARM architecture 
which I've pushed for testing to linux-next. I've added it to my 
for-next-cma branch:

http://git.linaro.org/gitweb?p=people/mszyprowski/linux-dma-mapping.git;a=shortlog;h=refs/heads/for-next-cma

Best regards
-- 
Marek Szyprowski
Samsung Poland R&D Center