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| author | David Rientjes <rientjes@google.com> | 2015-03-12 16:25:54 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2015-03-12 18:46:07 -0700 |
| commit | 44fc80573cc760a7154f41fd0a958ee10eba1a81 (patch) | |
| tree | 2d3fd80fa0bc653b2be577e38ef38217727acd22 /mm/cma.c | |
| parent | e009d5dc0a94a7133e5f1c083732d760bfd038e6 (diff) | |
| download | op-kernel-dev-44fc80573cc760a7154f41fd0a958ee10eba1a81.zip op-kernel-dev-44fc80573cc760a7154f41fd0a958ee10eba1a81.tar.gz | |
mm, hugetlb: close race when setting PageTail for gigantic pages
Now that gigantic pages are dynamically allocatable, care must be taken to
ensure that p->first_page is valid before setting PageTail.
If this isn't done, then it is possible to race and have compound_head()
return NULL.
Signed-off-by: David Rientjes <rientjes@google.com>
Acked-by: Davidlohr Bueso <dave@stgolabs.net>
Cc: Luiz Capitulino <lcapitulino@redhat.com>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Acked-by: Hillf Danton <hillf.zj@alibaba-inc.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/cma.c')
0 files changed, 0 insertions, 0 deletions
