tree 21d077b2a4f6cdf564bf225b935ba1bd43be62bc
parent 51ddfe9f0ef049bc0559985c3ac56e917d4f7410
author Paul E. McKenney <paul.mckenney@linaro.org> 1345141390 -0700
committer Paul E. McKenney <paulmck@linux.vnet.ibm.com> 1345149126 -0700

sched: Make migration_call() safe for stop_machine()-free hotplug

The CPU_DYING branch of migration_call() relies on the fact that
CPU-hotplug offline operations use stop_machine().  This commit therefore
attempts to remedy this situation by moving work to the CPU_DEAD
notifier when the outgoing CPU is quiescent.  This requires a small
change to migrate_nr_uninterruptible() to move counts to the current
running CPU instead of a randomly selected CPU.

Signed-off-by: Paul E. McKenney <paul.mckenney@linaro.org>