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arm64: hugetlb: fix the wrong return value for huge_ptep_set_access_flags 

In current code, the @changed always returns the last one's status for
the huge page with the contiguous bit set. This is really not what we
want. Even one of the PTEs is changed, we should tell it to the caller.

This patch fixes this issue.

Fixes: 66b3923a1a ("arm64: hugetlb: add support for PTE contiguous bit")
Cc: <stable@vger.kernel.org> # 4.5.x-
Signed-off-by: Huang Shijie <shijie.huang@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
This commit is contained in:
Huang Shijie 2017-01-11 14:02:00 +08:00 committed by Catalin Marinas
parent a121103c92
commit 69d012345a
1 changed files with 1 additions and 1 deletions
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2
arch/arm64/mm/hugetlbpage.c
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@ -239,7 +239,7 @@ int huge_ptep_set_access_flags(struct vm_area_struct *vma,
ncontig = find_num_contig(vma->vm_mm, addr, cpte,
*cpte, &pgsize);
for (i = 0; i < ncontig; ++i, ++cpte, addr += pgsize) {
changed = ptep_set_access_flags(vma, addr, cpte,
changed |= ptep_set_access_flags(vma, addr, cpte,
pfn_pte(pfn,
hugeprot),
dirty);