sparc: huge_ptep_set_* functions need to call set_huge_pte_at()
Dave Kleikamp [Mon, 17 Dec 2012 17:52:47 +0000 (11:52 -0600)]
[ Upstream commit 6cb9c3697585c47977c42c5cc1b9fc49247ac530 ]

Modifying the huge pte's requires that all the underlying pte's be
modified.

Version 2: added missing flush_tlb_page()

Signed-off-by: Dave Kleikamp <dave.kleikamp@oracle.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: sparclinux@vger.kernel.org
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

arch/sparc/include/asm/hugetlb.h

index 1770610..f368cef 100644 (file)
@@ -58,14 +58,20 @@ static inline pte_t huge_pte_wrprotect(pte_t pte)
 static inline void huge_ptep_set_wrprotect(struct mm_struct *mm,
                                           unsigned long addr, pte_t *ptep)
 {
-       ptep_set_wrprotect(mm, addr, ptep);
+       pte_t old_pte = *ptep;
+       set_huge_pte_at(mm, addr, ptep, pte_wrprotect(old_pte));
 }
 
 static inline int huge_ptep_set_access_flags(struct vm_area_struct *vma,
                                             unsigned long addr, pte_t *ptep,
                                             pte_t pte, int dirty)
 {
-       return ptep_set_access_flags(vma, addr, ptep, pte, dirty);
+       int changed = !pte_same(*ptep, pte);
+       if (changed) {
+               set_huge_pte_at(vma->vm_mm, addr, ptep, pte);
+               flush_tlb_page(vma, addr);
+       }
+       return changed;
 }
 
 static inline pte_t huge_ptep_get(pte_t *ptep)