Re: [PATCH 1/7] ubi: block: Refactor sg list processing for highmem

On Thu, Aug 10, 2023 at 09:54:46PM +0200, Richard Weinberger wrote:

...

But why add the bounce buffering first if you can avoid it from the very beginning by just using kmap_local instead of adding a new caller for the deprecate kmap_atomic?

Because I want this fix also in all stable trees. kmap_local() is rather new. When back porting patch 1/7, bounce buffers and kmap_atomic() are needed anyway. By doing this in patch 1/7 I avoid backport troubles and keep the delta between upstream and stable trees minimal.

Just use plain kmap for the historic backports.