rcu: Add memory barriers for NOCB leader wakeup

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commit 6b5fc3a133 upstream.

Wait/wakeup operations do not guarantee ordering on their own.  Instead,
either locking or memory barriers are required.  This commit therefore
adds memory barriers to wake_nocb_leader() and nocb_leader_wait().

Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Tested-by: Krister Johansen <kjlx@templeofstupid.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Paul E. McKenney 2017-04-28 20:11:09 -07:00 • committed by Greg Kroah-Hartman

parent 63c634cf95

commit ac5e9e801f

1 changed files with 2 additions and 0 deletions

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kernel/rcu/tree_plugin.h

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