From: Monam Agarwal Date: Sun, 23 Mar 2014 18:28:27 +0000 (+0530) Subject: dm: use RCU_INIT_POINTER instead of rcu_assign_pointer in __unbind X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=9cdb8520049629271ad411ac91ab1bea3e1cfa2b;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git dm: use RCU_INIT_POINTER instead of rcu_assign_pointer in __unbind Replace rcu_assign_pointer(p, NULL) with RCU_INIT_POINTER(p, NULL). The rcu_assign_pointer() ensures that the initialization of a structure is carried out before storing a pointer to that structure. And in the case of the NULL pointer, there is no structure to initialize. So, rcu_assign_pointer(p, NULL) can be safely converted to RCU_INIT_POINTER(p, NULL). Signed-off-by: Monam Agarwal Signed-off-by: Mike Snitzer --- diff --git a/drivers/md/dm.c b/drivers/md/dm.c index 0d52f6ff2a1e..6382213dbd88 100644 --- a/drivers/md/dm.c +++ b/drivers/md/dm.c @@ -2163,7 +2163,7 @@ static struct dm_table *__unbind(struct mapped_device *md) return NULL; dm_table_event_callback(map, NULL, NULL); - rcu_assign_pointer(md->map, NULL); + RCU_INIT_POINTER(md->map, NULL); dm_sync_table(md); return map;