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author | Naoya Horiguchi <n-horiguchi@ah.jp.nec.com> | 2015-02-11 15:25:32 -0800 |
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committer | Ben Hutchings <ben@decadent.org.uk> | 2015-05-09 23:16:16 +0100 |
commit | 73c67a84ebf1ecadb8f7d44e0a1ad668b453e9ae (patch) | |
tree | bdd5be45dac0fb31089ea271faeb9d5f463ad520 /mm/mmap.c | |
parent | 9e725572445374fe05d80478f4c4ff9631f9a59c (diff) | |
download | kernel_samsung_smdk4412-73c67a84ebf1ecadb8f7d44e0a1ad668b453e9ae.zip kernel_samsung_smdk4412-73c67a84ebf1ecadb8f7d44e0a1ad668b453e9ae.tar.gz kernel_samsung_smdk4412-73c67a84ebf1ecadb8f7d44e0a1ad668b453e9ae.tar.bz2 |
mm/hugetlb: add migration entry check in __unmap_hugepage_range
commit 9fbc1f635fd0bd28cb32550211bf095753ac637a upstream.
If __unmap_hugepage_range() tries to unmap the address range over which
hugepage migration is on the way, we get the wrong page because pte_page()
doesn't work for migration entries. This patch simply clears the pte for
migration entries as we do for hwpoison entries.
Fixes: 290408d4a2 ("hugetlb: hugepage migration core")
Signed-off-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: James Hogan <james.hogan@imgtec.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Mel Gorman <mel@csn.ul.ie>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Michal Hocko <mhocko@suse.cz>
Cc: Rik van Riel <riel@redhat.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Luiz Capitulino <lcapitulino@redhat.com>
Cc: Nishanth Aravamudan <nacc@linux.vnet.ibm.com>
Cc: Lee Schermerhorn <lee.schermerhorn@hp.com>
Cc: Steve Capper <steve.capper@linaro.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
[bwh: Backported to 3.2: adjust context and comment, as we're checking after
the PTE has been cleared]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Diffstat (limited to 'mm/mmap.c')
0 files changed, 0 insertions, 0 deletions