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authorPaul E. McKenney <paulmck@linux.vnet.ibm.com>2010-02-23 02:05:02 +0100
committerIngo Molnar <mingo@elte.hu>2010-02-25 10:34:58 +0100
commit1304afb225288a2e250d6a7495462c28e5509cbb (patch)
tree1ba76e304f718f7ce89532e1c4d276b4af439c07 /kernel/rcutree.h
parentrcu: Stop overflowing signed integers (diff)
downloadlinux-1304afb225288a2e250d6a7495462c28e5509cbb.tar.xz
linux-1304afb225288a2e250d6a7495462c28e5509cbb.zip
rcu: Convert to raw_spinlocks
The spinlocks in rcutree need to be real spinlocks in preempt-rt. Convert them to raw_spinlocks. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Cc: laijs@cn.fujitsu.com Cc: dipankar@in.ibm.com Cc: mathieu.desnoyers@polymtl.ca Cc: josh@joshtriplett.org Cc: dvhltc@us.ibm.com Cc: niv@us.ibm.com Cc: peterz@infradead.org Cc: rostedt@goodmis.org Cc: Valdis.Kletnieks@vt.edu Cc: dhowells@redhat.com LKML-Reference: <1266887105-1528-18-git-send-email-paulmck@linux.vnet.ibm.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel/rcutree.h')
-rw-r--r--kernel/rcutree.h6
1 files changed, 3 insertions, 3 deletions
diff --git a/kernel/rcutree.h b/kernel/rcutree.h
index 7495fed49c30..6a82c34ce669 100644
--- a/kernel/rcutree.h
+++ b/kernel/rcutree.h
@@ -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(). */