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IB/hfi1: Remove unneeded empty check in hfi1_mmu_rb_unregister() 

Checking if the rb tree is empty is redundant with the while loop which is
emptying the rb tree.

Reviewed-by: Ira Weiny <ira.weiny@intel.com>
Signed-off-by: Dean Luick <dean.luick@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
This commit is contained in:
Dean Luick 2016-07-28 12:27:36 -04:00 committed by Doug Ledford
parent ea3a0ee52d
commit 20a42d0833
1 changed files with 6 additions and 9 deletions
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15
drivers/infiniband/hw/hfi1/mmu_rb.c
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@ -118,6 +118,8 @@ int hfi1_mmu_rb_register(struct rb_root *root, struct mmu_rb_ops *ops)
void hfi1_mmu_rb_unregister(struct rb_root *root)
{
struct mmu_rb_handler *handler = find_mmu_handler(root);
struct mmu_rb_node *rbnode;
struct rb_node *node;
unsigned long flags;
if (!handler)
@ -133,15 +135,10 @@ void hfi1_mmu_rb_unregister(struct rb_root *root)
synchronize_rcu();
spin_lock_irqsave(&handler->lock, flags);
if (!RB_EMPTY_ROOT(root)) {
struct rb_node *node;
struct mmu_rb_node *rbnode;
while ((node = rb_first(root))) {
rbnode = rb_entry(node, struct mmu_rb_node, node);
rb_erase(node, root);
handler->ops->remove(root, rbnode, NULL);
}
while ((node = rb_first(root))) {
rbnode = rb_entry(node, struct mmu_rb_node, node);
rb_erase(node, root);
handler->ops->remove(root, rbnode, NULL);
}
spin_unlock_irqrestore(&handler->lock, flags);