hugetlb: unsigned ret cannot be negative
unsigned long ret cannot be negative, but ret can get -EFAULT. Signed-off-by: NRoel Kluin <roel.kluin@gmail.com> Cc: Hugh Dickins <hugh@veritas.com> Cc: Christoph Lameter <clameter@sgi.com> Cc: Adam Litke <agl@us.ibm.com> Cc: David Gibson <david@gibson.dropbear.id.au> Cc: Ken Chen <kenchen@google.com> Cc: Nick Piggin <npiggin@suse.de> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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