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I don't believe this check is needed any more in the current kernel, which, if I understand correctly, is for compound page where only the first page is supposed to get ref-counted. Signed-off-by: Yi Zou <yi.zou@intel.com> Signed-off-by: Robert Love <robert.w.love@intel.com> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>