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From: Paul E. McKenney on 18 May 2010 14:40
Hello, Jens,

Would you like to carry this patch, or should I push it up -tip? If I
don't hear otherwise from you, I will push it up -tip. The
INIT_RCU_HEAD() primitive is going away in favor of debugobjects.

Thanx, Paul

------------------------------------------------------------------------

block: remove all rcu head initializations

Remove all rcu head inits. We don't care about the RCU head state before passing
it to call_rcu() anyway. Only leave the "on_stack" variants so debugobjects can
keep track of objects on stack.

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers(a)efficios.com>
Signed-off-by: Paul E. McKenney <paulmck(a)linux.vnet.ibm.com>
Cc: Jens Axboe <jens.axboe(a)oracle.com>

diff --git a/block/cfq-iosched.c b/block/cfq-iosched.c
index 5f127cf..702d006 100644
--- a/block/cfq-iosched.c
+++ b/block/cfq-iosched.c
@@ -3743,7 +3743,6 @@ static void *cfq_init_queue(struct request_queue *q)
* second, in order to have larger depth for async operations.
*/
cfqd->last_delayed_sync = jiffies - HZ;
- INIT_RCU_HEAD(&cfqd->rcu);
return cfqd;
}

diff --git a/block/genhd.c b/block/genhd.c
index d13ba76..27e85a2 100644
--- a/block/genhd.c
+++ b/block/genhd.c
@@ -987,7 +987,6 @@ int disk_expand_part_tbl(struct gendisk *disk, int partno)
if (!new_ptbl)
return -ENOMEM;

- INIT_RCU_HEAD(&new_ptbl->rcu_head);
new_ptbl->len = target;

for (i = 0; i < len; i++)
--
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