[PATCH v2 6/9] i915: Use writeback_iter()

[Christoph Hellwig]

On Wed, Apr 02, 2025 at 04:00:00PM +0100, Matthew Wilcox (Oracle) wrote:
> Convert from an inefficient loop to the standard writeback iterator.

Not for this patch but a follow on:  we really need to improve the
abstraction for using shmem for driver a bit.  Drivers implementing
their own writeback_iter based loop is a bad idea.   Instead the
code here in __shmem_writeback and the similar version in ttm need to
be consolidated into a nicely abstracted highlevel API in shmem.c.

Similarly for the mess these drivers cause by calling into the
write_begin and write_end aops.