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-rw-r--r--mm/mprotect.c7
1 files changed, 4 insertions, 3 deletions
diff --git a/mm/mprotect.c b/mm/mprotect.c
index 769a67a..79cb518 100644
--- a/mm/mprotect.c
+++ b/mm/mprotect.c
@@ -118,6 +118,8 @@ static inline unsigned long change_pmd_range(struct vm_area_struct *vma,
unsigned long this_pages;
next = pmd_addr_end(addr, end);
+ if (!pmd_trans_huge(*pmd) && pmd_none_or_clear_bad(pmd))
+ continue;
if (pmd_trans_huge(*pmd)) {
if (next - addr != HPAGE_PMD_SIZE)
split_huge_page_pmd(vma, addr, pmd);
@@ -133,10 +135,9 @@ static inline unsigned long change_pmd_range(struct vm_area_struct *vma,
continue;
}
}
- /* fall through */
+ /* fall through, the trans huge pmd just split */
}
- if (pmd_none_or_clear_bad(pmd))
- continue;
+ VM_BUG_ON(pmd_trans_huge(*pmd));
this_pages = change_pte_range(vma, pmd, addr, next, newprot,
dirty_accountable, prot_numa);
pages += this_pages;
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