Re: [PATCH 2/6] UBI: Fastmap: Don't allocate new ubi_wl_entry objects

[Richard Weinberger <richard@nod.at>]

Am 08.12.2014 um 09:36 schrieb Tanya Brokhman:
> On 11/30/2014 1:35 PM, Richard Weinberger wrote:
>> There is no need to allocate new ones every time, we can reuse
>> the existing ones.
>> This makes the code cleaner and more easy to follow.
>>
>> Signed-off-by: Richard Weinberger <richard@nod.at>
>> ---
>>   drivers/mtd/ubi/fastmap.c | 31 +++++--------------------------
>>   drivers/mtd/ubi/wl.c      | 11 +++++++----
>>   2 files changed, 12 insertions(+), 30 deletions(-)
>>
>> diff --git a/drivers/mtd/ubi/fastmap.c b/drivers/mtd/ubi/fastmap.c
>> index db3defd..9507702 100644
>> --- a/drivers/mtd/ubi/fastmap.c
>> +++ b/drivers/mtd/ubi/fastmap.c
>> @@ -1446,19 +1446,6 @@ int ubi_update_fastmap(struct ubi_device *ubi)
>>       }
>>
>>       new_fm->used_blocks = ubi->fm_size / ubi->leb_size;
> 
> Not related to this patch, but looking at this function it got me thinking: why do we need to re-calculate new_fm->used_blocks (and check calculated value) each time? fm_size
> doesn't changed at runtime. leb_size sure does not, so fm->used_blocks can be ubi device parameter and calculated & tested only once, and not each time we write fastmap. Correct?

If you dig deeper into the patch set you'll notice that the fastmap size can change. :-)

Thanks,
//richard