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Commit ce0ad7f0 authored by Nick Piggin's avatar Nick Piggin Committed by Benjamin Herrenschmidt
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powerpc/mm: Lockless get_user_pages_fast() for 64-bit (v3)



Implement lockless get_user_pages_fast for 64-bit powerpc.

Page table existence is guaranteed with RCU, and speculative page references
are used to take a reference to the pages without having a prior existence
guarantee on them.

Signed-off-by: default avatarNick Piggin <npiggin@suse.de>
Signed-off-by: default avatarDave Kleikamp <shaggy@linux.vnet.ibm.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarBenjamin Herrenschmidt <benh@kernel.crashing.org>
parent 7d2a175b
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