Hi! > > > This patch introduces helpers of 'mp_bvec_iter_*' for multi-page bvec > > > support. > > > > > > The introduced helpers treate one bvec as real multi-page segment, > > > which may include more than one pages. > > > > > > The existed helpers of bvec_iter_* are interfaces for supporting current > > > bvec iterator which is thought as single-page by drivers, fs, dm and > > > etc. These introduced helpers will build single-page bvec in flight, so > > > this way won't break current bio/bvec users, which needn't any > > > change. > > > > I don't understand why we have this in 4.19-stable. I don't see > > followup patches needing it, and it does not claim to fix a bug. > > > There is some more context on this at: > https://lore.kernel.org/linux-block/YXweJ00CVsDLCI7b@xxxxxxxxxx/T/#u > and > https://lore.kernel.org/stable/YYVZBuDaWBKT3vOS@xxxxxxxxxx/T/#u Thank you! Pavel -- http://www.livejournal.com/~pavelmachek
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