rcu: Avoid clobbering early boot callbacks

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When a CPU comes online, it initializes its callback list.  This
is a bad thing if this is the first time that the CPU has come
online and if that CPU has early boot callbacks.  This commit therefore
avoid initializing the callback list if there are callbacks present,
in which case the initial call_rcu() did the initialization for us.

Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>

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Paul E. McKenney 2015-01-20 23:42:38 -08:00

parent 59f792d1ef

commit 39c8d313c3

1 changed files with 2 additions and 1 deletions

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kernel/rcu/tree.c

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