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Diffstat (limited to 'arch/parisc/include/asm')
-rw-r--r--arch/parisc/include/asm/pgtable.h47
1 files changed, 25 insertions, 22 deletions
diff --git a/arch/parisc/include/asm/pgtable.h b/arch/parisc/include/asm/pgtable.h
index 7df49fad29f..1e40d7f86be 100644
--- a/arch/parisc/include/asm/pgtable.h
+++ b/arch/parisc/include/asm/pgtable.h
@@ -16,6 +16,8 @@
#include <asm/processor.h>
#include <asm/cache.h>
+extern spinlock_t pa_dbit_lock;
+
/*
* kern_addr_valid(ADDR) tests if ADDR is pointing to valid kernel
* memory. For the return value to be meaningful, ADDR must be >=
@@ -44,8 +46,11 @@ extern void purge_tlb_entries(struct mm_struct *, unsigned long);
#define set_pte_at(mm, addr, ptep, pteval) \
do { \
+ unsigned long flags; \
+ spin_lock_irqsave(&pa_dbit_lock, flags); \
set_pte(ptep, pteval); \
purge_tlb_entries(mm, addr); \
+ spin_unlock_irqrestore(&pa_dbit_lock, flags); \
} while (0)
#endif /* !__ASSEMBLY__ */
@@ -435,48 +440,46 @@ extern void update_mmu_cache(struct vm_area_struct *, unsigned long, pte_t *);
static inline int ptep_test_and_clear_young(struct vm_area_struct *vma, unsigned long addr, pte_t *ptep)
{
-#ifdef CONFIG_SMP
+ pte_t pte;
+ unsigned long flags;
+
if (!pte_young(*ptep))
return 0;
- return test_and_clear_bit(xlate_pabit(_PAGE_ACCESSED_BIT), &pte_val(*ptep));
-#else
- pte_t pte = *ptep;
- if (!pte_young(pte))
+
+ spin_lock_irqsave(&pa_dbit_lock, flags);
+ pte = *ptep;
+ if (!pte_young(pte)) {
+ spin_unlock_irqrestore(&pa_dbit_lock, flags);
return 0;
- set_pte_at(vma->vm_mm, addr, ptep, pte_mkold(pte));
+ }
+ set_pte(ptep, pte_mkold(pte));
+ purge_tlb_entries(vma->vm_mm, addr);
+ spin_unlock_irqrestore(&pa_dbit_lock, flags);
return 1;
-#endif
}
-extern spinlock_t pa_dbit_lock;
-
struct mm_struct;
static inline pte_t ptep_get_and_clear(struct mm_struct *mm, unsigned long addr, pte_t *ptep)
{
pte_t old_pte;
+ unsigned long flags;
- spin_lock(&pa_dbit_lock);
+ spin_lock_irqsave(&pa_dbit_lock, flags);
old_pte = *ptep;
pte_clear(mm,addr,ptep);
- spin_unlock(&pa_dbit_lock);
+ purge_tlb_entries(mm, addr);
+ spin_unlock_irqrestore(&pa_dbit_lock, flags);
return old_pte;
}
static inline void ptep_set_wrprotect(struct mm_struct *mm, unsigned long addr, pte_t *ptep)
{
-#ifdef CONFIG_SMP
- unsigned long new, old;
-
- do {
- old = pte_val(*ptep);
- new = pte_val(pte_wrprotect(__pte (old)));
- } while (cmpxchg((unsigned long *) ptep, old, new) != old);
+ unsigned long flags;
+ spin_lock_irqsave(&pa_dbit_lock, flags);
+ set_pte(ptep, pte_wrprotect(*ptep));
purge_tlb_entries(mm, addr);
-#else
- pte_t old_pte = *ptep;
- set_pte_at(mm, addr, ptep, pte_wrprotect(old_pte));
-#endif
+ spin_unlock_irqrestore(&pa_dbit_lock, flags);
}
#define pte_same(A,B) (pte_val(A) == pte_val(B))