[PATCH] mm/vmalloc.c: use rb_entry_safe

[Geliang Tang]

Use rb_entry_safe() instead of open-coding it.

Signed-off-by: Geliang Tang <geliangt...@gmail.com>
---
 mm/vmalloc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mm/vmalloc.c b/mm/vmalloc.c
index a558438..b9999fc 100644
--- a/mm/vmalloc.c
+++ b/mm/vmalloc.c
@@ -2309,7 +2309,7 @@ EXPORT_SYMBOL_GPL(free_vm_area);
 #ifdef CONFIG_SMP
 static struct vmap_area *node_to_va(struct rb_node *n)
 {
-       return n ? rb_entry(n, struct vmap_area, rb_node) : NULL;
+       return rb_entry_safe(n, struct vmap_area, rb_node);
 }
 
 /**
-- 
2.9.3