The use of "rcu_assign_pointer()" is NULLing out the pointer.
According to RCU_INIT_POINTER()'s block comment:
"1. This use of RCU_INIT_POINTER() is NULLing out the pointer"
it is better to use it instead of rcu_assign_pointer() because it has a
smaller overhead.
The following Coccinelle semantic patch was used:
@@
@@
- rcu_assign_pointer
+ RCU_INIT_POINTER
(..., NULL)
Signed-off-by: Andreea-Cristina Bernat <bernat....@gmail.com>
---
block/genhd.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/block/genhd.c b/block/genhd.c
index 791f419..3aec057 100644
--- a/block/genhd.c
+++ b/block/genhd.c
@@ -1045,7 +1045,7 @@ static void disk_replace_part_tbl(struct gendisk *disk,
rcu_assign_pointer(disk->part_tbl, new_ptbl);
if (old_ptbl) {
- rcu_assign_pointer(old_ptbl->last_lookup, NULL);
+ RCU_INIT_POINTER(old_ptbl->last_lookup, NULL);
kfree_rcu(old_ptbl, rcu_head);
}
}
--
1.9.1
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