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iommu: Replace rcu_assign_pointer() with RCU_INIT_POINTER()

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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.ada@gmail.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
This commit is contained in:
Andreea-Cristina Bernat 2014-08-18 15:20:56 +03:00 committed by Joerg Roedel
parent f63ef69028
commit eecbad7d03
1 changed files with 1 additions and 1 deletions
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2
drivers/iommu/dmar.c
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@ -247,7 +247,7 @@ int dmar_remove_dev_scope(struct dmar_pci_notify_info *info, u16 segment,
for_each_active_dev_scope(devices, count, index, tmp)
if (tmp == &info->dev->dev) {
rcu_assign_pointer(devices[index].dev, NULL);
RCU_INIT_POINTER(devices[index].dev, NULL);
synchronize_rcu();
put_device(tmp);
return 1;