lib/scatterlist: add a flags to signalize mapping direction
sg_miter_start() is currently unaware of the direction of the copy process (to or from the scatter list). It is important to know the direction because the page has to be flushed in case the data written is seen on a different mapping in user land on cache incoherent architectures. Signed-off-by:Sebastian Andrzej Siewior <sebastian@breakpoint.cc> Acked-by:
FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Acked-by:
Tejun Heo <tj@kernel.org> Signed-off-by:
Pierre Ossman <pierre@ossman.eu>
parent
b5929724
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