Description: mm: thp: fix pmd_present for split_huge_page and PROT_NONE with THP
References:
 https://bugzilla.redhat.com/show_bug.cgi?id=912898
Notes:
Bugs:
upstream: released (3.7) [027ef6c8]
2.6.32-upstream-stable: N/A "no THP support"
sid: released (3.2.32-1)
2.6.32-squeeze-security: N/A "no THP support"
3.2-upstream-stable: released (3.2.32)