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H A Ddm.cdiff 563a225c9fd207326c2a2af9d59b4097cb31ce70 Sat Mar 26 20:08:36 CDT 2022 Mike Snitzer <snitzer@kernel.org> dm: introduce dm_{get,put}_live_table_bio called from dm_submit_bio

If a bio is marked REQ_NOWAIT optimize dm_submit_bio()'s dm_table RCU
usage to dm_{get,put}_live_table_fast.

DM core offers protection against blocking (via suspend) if REQ_NOWAIT.

Signed-off-by: Mike Snitzer <snitzer@kernel.org>