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mm/hugetlb: fix potential missing huge page size info 

commit 0eb98f1588 upstream.

The huge page size is encoded for VM_FAULT_HWPOISON errors only.  So if
we return VM_FAULT_HWPOISON, huge page size would just be ignored.

Link: https://lkml.kernel.org/r/20210107123449.38481-1-linmiaohe@huawei.com
Fixes: aa50d3a7aa ("Encode huge page size for VM_FAULT_HWPOISON errors")
Signed-off-by: Miaohe Lin <linmiaohe@huawei.com>
Reviewed-by: Mike Kravetz <mike.kravetz@oracle.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5.4-rM2-2.2.x-imx-squashed
Miaohe Lin 2021-01-12 15:49:24 -08:00 committed by Greg Kroah-Hartman
parent c64366620d
commit 4335af6c62
1 changed files with 1 additions and 1 deletions
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2
mm/hugetlb.c
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@ -4036,7 +4036,7 @@ retry:
* So we need to block hugepage fault by PG_hwpoison bit check.
*/
if (unlikely(PageHWPoison(page))) {
ret = VM_FAULT_HWPOISON |
ret = VM_FAULT_HWPOISON_LARGE |
VM_FAULT_SET_HINDEX(hstate_index(h));
goto backout_unlocked;
}