parisc: Flush kernel data mapping in set_pte_at() when installing pte for user page

[platform/kernel/linux-rpi.git] / arch / parisc / include / asm / pgtable.h

diff --git a/arch/parisc/include/asm/pgtable.h b/arch/parisc/include/asm/pgtable.h
index 7badd87..3e7cf88 100644 (file)
--- a/arch/parisc/include/asm/pgtable.h
+++ b/arch/parisc/include/asm/pgtable.h
@@ -76,6 +76,8 @@ static inline void purge_tlb_entries(struct mm_struct *mm, unsigned long addr)
        purge_tlb_end(flags);
 }
 
+extern void __update_cache(pte_t pte);
+
 /* Certain architectures need to do special things when PTEs
  * within a page table are directly modified.  Thus, the following
  * hook is made available.
@@ -83,11 +85,14 @@ static inline void purge_tlb_entries(struct mm_struct *mm, unsigned long addr)
 #define set_pte(pteptr, pteval)                        \
        do {                                    \
                *(pteptr) = (pteval);           \
-               barrier();                      \
+               mb();                           \
        } while(0)
 
 #define set_pte_at(mm, addr, pteptr, pteval)   \
        do {                                    \
+               if (pte_present(pteval) &&      \
+                   pte_user(pteval))           \
+                       __update_cache(pteval); \
                *(pteptr) = (pteval);           \
                purge_tlb_entries(mm, addr);    \
        } while (0)
@@ -303,6 +308,7 @@ extern unsigned long *empty_zero_page;
 
 #define pte_none(x)     (pte_val(x) == 0)
 #define pte_present(x) (pte_val(x) & _PAGE_PRESENT)
+#define pte_user(x)    (pte_val(x) & _PAGE_USER)
 #define pte_clear(mm, addr, xp)  set_pte_at(mm, addr, xp, __pte(0))
 
 #define pmd_flag(x)    (pmd_val(x) & PxD_FLAG_MASK)
@@ -410,7 +416,7 @@ extern void paging_init (void);
 
 #define PG_dcache_dirty         PG_arch_1
 
-extern void update_mmu_cache(struct vm_area_struct *, unsigned long, pte_t *);
+#define update_mmu_cache(vms,addr,ptep) __update_cache(*ptep)
 
 /* Encode and de-code a swap entry */