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authorAndi Kleen <ak@suse.de>2008-07-24 06:27:50 +0200
committerLinus Torvalds <torvalds@linux-foundation.org>2008-07-24 19:47:18 +0200
commitceb868796181dc95ea01a110e123afd391639873 (patch)
tree991be618e5195b05c31974a19adb4b9602315013 /mm/hugetlb.c
parenthugetlb: printk cleanup (diff)
downloadlinux-ceb868796181dc95ea01a110e123afd391639873.tar.xz
linux-ceb868796181dc95ea01a110e123afd391639873.zip
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 0c74c14dd2f7..107c1ce223cb 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,