Merge v7.1.5linux-rolling-stable

Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 5 insertions, 6 deletions

diff --git a/drivers/nvdimm/nd.h b/drivers/nvdimm/nd.h
index b199eea3260e..197e5368c0a4 100644
--- a/drivers/nvdimm/nd.h
+++ b/drivers/nvdimm/nd.h
@@ -365,11 +365,6 @@ unsigned sizeof_namespace_label(struct nvdimm_drvdata *ndd);
 	for (res = (ndd)->dpa.child, next = res ? res->sibling : NULL; \
 			res; res = next, next = next ? next->sibling : NULL)
 
-struct nd_percpu_lane {
-	int count;
-	spinlock_t lock;
-};
-
 enum nd_label_flags {
 	ND_LABEL_REAP,
 };
@@ -400,6 +395,10 @@ struct nd_mapping {
 	struct nvdimm_drvdata *ndd;
 };
 
+struct nd_lane {
+	struct mutex lock; /* serialize lane access */
+} ____cacheline_aligned_in_smp;
+
 struct nd_region {
 	struct device dev;
 	struct ida ns_ida;
@@ -420,7 +419,7 @@ struct nd_region {
 	struct kernfs_node *bb_state;
 	struct badblocks bb;
 	struct nd_interleave_set *nd_set;
-	struct nd_percpu_lane __percpu *lane;
+	struct nd_lane *lane;
 	int (*flush)(struct nd_region *nd_region, struct bio *bio);
 	struct nd_mapping mapping[] __counted_by(ndr_mappings);
 };