kmap leak fix for x86_32 kdump
copy_oldmem_page should not return leaving a page frame from the previous kernel mapped. Signed-off-by: NFernando Luis Vázquez Cao <fernando@oss.ntt.co.jp> Acked-by: NVivek Goyal <vgoyal@in.ibm.com> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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