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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 <sasha.levin@oracle.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Andrey Ryabinin <a.ryabinin@samsung.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Sasha Levin 2014-12-10 15:44:13 -08:00 committed by Linus Torvalds
parent 247b1447b6
commit 97ad2be1da
1 changed files with 2 additions and 1 deletions
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3
include/linux/hugetlb.h
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@ -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)