rcu/kvfree: Move need_offload_krc() out of krcp->lock

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The need_offload_krc() function currently holds the krcp->lock in order
to safely check krcp->head.  This commit removes the need for this lock
in that function by updating the krcp->head pointer using WRITE_ONCE()
macro so that readers can carry out lockless loads of that pointer.

Signed-off-by: Uladzislau Rezki (Sony) <urezki@gmail.com>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>

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Uladzislau Rezki (Sony) 2022-11-29 16:58:21 +01:00 • committed by Paul E. McKenney

parent 8c15a9e808

commit 8fc5494ad5

1 changed files with 4 additions and 7 deletions

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kernel/rcu/tree.c

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