mm/vmalloc.c: use rb_entry_safe
Use rb_entry_safe() instead of open-coding it. Link: http://lkml.kernel.org/r/81bb9820e5b9e4a1c596b3e76f88abf8c4a76cb0.1482221947.git.geliangtang@gmail.com Signed-off-by: Geliang Tang <geliangtang@gmail.com> Acked-by: Michal Hocko <mhocko@suse.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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				| @ -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); | ||||
| } | ||||
| 
 | ||||
| /**
 | ||||
|  | ||||
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