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rcu: Convert to raw_spinlocks

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The spinlocks in rcutree need to be real spinlocks in
preempt-rt. Convert them to raw_spinlocks.

Signed-off-by: Thomas Gleixner <[email protected]>
Signed-off-by: Paul E. McKenney <[email protected]>
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LKML-Reference: <[email protected]>
Signed-off-by: Ingo Molnar <[email protected]>
This commit is contained in:
Paul E. McKenney 2010-02-22 17:05:02 -08:00 • committed by Ingo Molnar
commit 1304afb225
3 changed files with 92 additions and 92 deletions
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6
kernel/rcutree.h
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@ -90,7 +90,7 @@ struct rcu_dynticks {
* Definition for node within the RCU grace-period-detection hierarchy.
*/
struct rcu_node {
spinlock_t lock; /* Root rcu_node's lock protects some */
raw_spinlock_t lock; /* Root rcu_node's lock protects some */
/* rcu_state fields as well as following. */
unsigned long gpnum; /* Current grace period for this node. */
/* This will either be equal to or one */
@ -291,7 +291,7 @@ struct rcu_state {
/* End of fields guarded by root rcu_node's lock. */
spinlock_t onofflock; /* exclude on/offline and */
raw_spinlock_t onofflock; /* exclude on/offline and */
/* starting new GP. Also */
/* protects the following */
/* orphan_cbs fields. */
@ -301,7 +301,7 @@ struct rcu_state {
/* going offline. */
struct rcu_head **orphan_cbs_tail; /* And tail pointer. */
long orphan_qlen; /* Number of orphaned cbs. */
spinlock_t fqslock; /* Only one task forcing */
raw_spinlock_t fqslock; /* Only one task forcing */
/* quiescent states. */
unsigned long jiffies_force_qs; /* Time at which to invoke */
/* force_quiescent_state(). */