[RFC PATCH 08/12] cma: Store a name in the cma structure

Laura Abbott
2017-03-17T18:02:34Z

On 03/10/2017 12:53 AM, Sumit Semwal wrote:
> Hi Laura,
>
> Thanks for the patch.
>
> On 3 March 2017 at 03:14, Laura Abbott <labbott@redhat.com> wrote:
>>
>> Frameworks that may want to enumerate CMA heaps (e.g. Ion) will find it
>> useful to have an explicit name attached to each region. Store the name
>> in each CMA structure.
>>
>> Signed-off-by: Laura Abbott <labbott@redhat.com>
>> ---
>> drivers/base/dma-contiguous.c | 5 +++--
>> include/linux/cma.h | 4 +++-
>> mm/cma.c | 11 +++++++++--
>> mm/cma.h | 1 +
>> mm/cma_debug.c | 2 +-
>> 5 files changed, 17 insertions(+), 6 deletions(-)
>>
> <snip>
>> +const char *cma_get_name(const struct cma *cma)
>> +{
>> + return cma->name ? cma->name : "(undefined)";
>> +}
>> +
> Would it make sense to perhaps have the idx stored as the name,
> instead of 'undefined'? That would make sure that the various cma
> names are still unique.
>

Good suggestion. I'll see about cleaning that up.

>> static unsigned long cma_bitmap_aligned_mask(const struct cma *cma,
>> int align_order)
>> {
>> @@ -168,6 +173,7 @@ core_initcall(cma_init_reserved_areas);
>> */
>> int __init cma_init_reserved_mem(phys_addr_t base, phys_addr_t size,
>> unsigned int order_per_bit,
>> + const char *name,
>> struct cma **res_cma)
>> {
>
> Best regards,
> Sumit.
>