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SubjectRe: remove the ->mapping_error method from dma_map_ops V2
On Thu, Nov 29, 2018 at 10:53:32AM -0800, Linus Torvalds wrote:
> Most of the high-performance IO is already using SG lists anyway, no?
> Disk/networking/whatever.

Networking basically never uses S/G lists. Block I/O mostly uses it,
and graphics / media seems to have a fair amount of S/G uses, including
very, erm special ones.

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