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We were leaking pmd pages when 3_LEVEL_PGTABLES was enabled. This fixes that,
has been well tested and is included in mainline tree. Please include in -stable
as well.
Signed-off-by: Jeff Dike <jdike@addtoit.com>
Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it>
Signed-off-by: Chris Wright <chrisw@osdl.org>