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authorAndi Kleen <ak@suse.de>2008-07-23 21:27:50 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2008-07-24 10:47:18 -0700
commitceb868796181dc95ea01a110e123afd391639873 (patch)
tree991be618e5195b05c31974a19adb4b9602315013 /mm/hugetlb.c
parent4abd32dbab201c3ced0b0af12accea77cd9eeffc (diff)
downloadop-kernel-dev-ceb868796181dc95ea01a110e123afd391639873.zip
op-kernel-dev-ceb868796181dc95ea01a110e123afd391639873.tar.gz
hugetlb: introduce pud_huge
Straight forward extensions for huge pages located in the PUD instead of PMDs. Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Nick Piggin <npiggin@suse.de> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/hugetlb.c')
-rw-r--r--mm/hugetlb.c9
1 files changed, 9 insertions, 0 deletions
diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index 0c74c14..107c1ce 100644
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -1996,6 +1996,15 @@ int hugetlb_fault(struct mm_struct *mm, struct vm_area_struct *vma,
return ret;
}
+/* Can be overriden by architectures */
+__attribute__((weak)) struct page *
+follow_huge_pud(struct mm_struct *mm, unsigned long address,
+ pud_t *pud, int write)
+{
+ BUG();
+ return NULL;
+}
+
int follow_hugetlb_page(struct mm_struct *mm, struct vm_area_struct *vma,
struct page **pages, struct vm_area_struct **vmas,
unsigned long *position, int *length, int i,
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