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);
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#ifdef CONFIG_SMP
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static struct vmap_area *node_to_va(struct rb_node *n)
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{
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return n ? rb_entry(n, struct vmap_area, rb_node) : NULL;
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return rb_entry_safe(n, struct vmap_area, rb_node);
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}
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/**
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