diff options
| author | Sasha Levin <[email protected]> | 2014-12-10 15:44:13 -0800 |
|---|---|---|
| committer | Linus Torvalds <[email protected]> | 2014-12-10 17:41:07 -0800 |
| commit | 97ad2be1daf8e6f2d297aa349101b340e1327917 (patch) | |
| tree | bc2f99575a556c2ff6c31ecd83d029d46124b95a | |
| parent | 247b1447b6ccb2890cefc370f8e204592a70774d (diff) | |
mm, hugetlb: correct bit shift in hstate_sizelog()
hstate_sizelog() would shift left an int rather than long, triggering
undefined behaviour and passing an incorrect value when the requested
page size was more than 4GB, thus breaking >4GB pages.
Signed-off-by: Sasha Levin <[email protected]>
Cc: Andrea Arcangeli <[email protected]>
Cc: Mel Gorman <[email protected]>
Cc: Andrey Ryabinin <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
| -rw-r--r-- | include/linux/hugetlb.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/include/linux/hugetlb.h b/include/linux/hugetlb.h index 6e6d338641fe..cdd149ca5cc0 100644 --- a/include/linux/hugetlb.h +++ b/include/linux/hugetlb.h @@ -311,7 +311,8 @@ static inline struct hstate *hstate_sizelog(int page_size_log) { if (!page_size_log) return &default_hstate; - return size_to_hstate(1 << page_size_log); + + return size_to_hstate(1UL << page_size_log); } static inline struct hstate *hstate_vma(struct vm_area_struct *vma) |