[PATCH for-next 08/10] IB/hfi1: Use kzalloc() for mmu_rb_handler allocation

[dennis.dalessandro@cornelisnetworks.com]

From: Mike Marciniszyn <mike.marciniszyn@cornelisnetworks.com>

The code currently assumes that the mmu_notifier struct
embedded in mmu_rb_handler only contains two fields.

There are now extra fields:

struct mmu_notifier {
        struct hlist_node hlist;
        const struct mmu_notifier_ops *ops;
        struct mm_struct *mm;
        struct rcu_head rcu;
        unsigned int users;
};

Given that there in no init for the mmu_notifier, a kzalloc() should
be used to insure that any newly added fields are given a predictable
initial value of zero.

Fixes: 06e0ffa69312 ("IB/hfi1: Re-factor MMU notification code")
Reviewed-by: Adam Goldman <adam.goldman@intel.com>
Signed-off-by: Mike Marciniszyn <mike.marciniszyn@cornelisnetworks.com>
Signed-off-by: Dennis Dalessandro <dennis.dalessandro@cornelisnetworks.com>
---
 drivers/infiniband/hw/hfi1/mmu_rb.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/infiniband/hw/hfi1/mmu_rb.c b/drivers/infiniband/hw/hfi1/mmu_rb.c
index 375a881..dccb4c1 100644
--- a/drivers/infiniband/hw/hfi1/mmu_rb.c
+++ b/drivers/infiniband/hw/hfi1/mmu_rb.c
@@ -89,7 +89,7 @@ int hfi1_mmu_rb_register(void *ops_arg,
 	struct mmu_rb_handler *h;
 	int ret;
 
-	h = kmalloc(sizeof(*h), GFP_KERNEL);
+	h = kzalloc(sizeof(*h), GFP_KERNEL);
 	if (!h)
 		return -ENOMEM;
 
-- 
1.8.3.1