tree 5e0f04a707b8c341f79927ba6fffd0ad55d85c29
parent 3b7c8108273bed41a2fc04533cc9f2026ff38c8e
author Heiko Carstens <heiko.carstens@de.ibm.com> 1147711438 -0700
committer Linus Torvalds <torvalds@g5.osdl.org> 1147717255 -0700

[PATCH] RCU: introduce rcu_needs_cpu() interface

With "Paul E. McKenney" <paulmck@us.ibm.com>

Introduce rcu_needs_cpu() interface.  This can be used to tell if there
will be a new rcu batch on a cpu soon by looking at the curlist pointer.
This can be used to avoid to enter a tickless idle state where the cpu
would miss that a new batch is ready when rcu_start_batch would be called
on a different cpu.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: "Paul E. McKenney" <paulmck@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>