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由 Nikolay Borisov 提交于
This is used in more than one places so let's factor it out in ctree.h. No functional changes. Signed-off-by: NNikolay Borisov <nborisov@suse.com> Reviewed-by: NDavid Sterba <dsterba@suse.com> Signed-off-by: NDavid Sterba <dsterba@suse.com>
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