static inline pte_t pte_mkwrite(pte_t pte) { (pte).pte_low |= _PAGE_RW; return pte; }
static inline pte_t pte_mkhuge(pte_t pte) { (pte).pte_low |= _PAGE_PSE; return pte; }
-extern void vmalloc_sync_all(void);
-
#ifdef CONFIG_X86_PAE
# include <asm/pgtable-3level.h>
#else
*/
#define pte_update(mm, addr, ptep) do { } while (0)
#define pte_update_defer(mm, addr, ptep) do { } while (0)
-
-#define raw_ptep_get_and_clear(xp) native_ptep_get_and_clear(xp)
#endif
+/* local pte updates need not use xchg for locking */
+static inline pte_t native_local_ptep_get_and_clear(pte_t *ptep)
+{
+ pte_t res = *ptep;
+
+ /* Pure native function needs no input for mm, addr */
+ native_pte_clear(NULL, 0, ptep);
+ return res;
+}
+
/*
* We only update the dirty/accessed state if we set
* the dirty bit by hand in the kernel, since the hardware
} \
} while (0)
-/*
- * We don't actually have these, but we want to advertise them so that
- * we can encompass the flush here.
- */
#define __HAVE_ARCH_PTEP_TEST_AND_CLEAR_DIRTY
+#define ptep_test_and_clear_dirty(vma, addr, ptep) ({ \
+ int ret = 0; \
+ if (pte_dirty(*ptep)) \
+ ret = test_and_clear_bit(_PAGE_BIT_DIRTY, &ptep->pte_low); \
+ if (ret) \
+ pte_update_defer(vma->vm_mm, addr, ptep); \
+ ret; \
+})
+
#define __HAVE_ARCH_PTEP_TEST_AND_CLEAR_YOUNG
+#define ptep_test_and_clear_young(vma, addr, ptep) ({ \
+ int ret = 0; \
+ if (pte_young(*ptep)) \
+ ret = test_and_clear_bit(_PAGE_BIT_ACCESSED, &ptep->pte_low); \
+ if (ret) \
+ pte_update_defer(vma->vm_mm, addr, ptep); \
+ ret; \
+})
/*
* Rules for using ptep_establish: the pte MUST be a user pte, and
#define ptep_clear_flush_dirty(vma, address, ptep) \
({ \
int __dirty; \
- __dirty = pte_dirty(*(ptep)); \
- if (__dirty) { \
- clear_bit(_PAGE_BIT_DIRTY, &(ptep)->pte_low); \
- pte_update_defer((vma)->vm_mm, (address), (ptep)); \
+ __dirty = ptep_test_and_clear_dirty((vma), (address), (ptep)); \
+ if (__dirty) \
flush_tlb_page(vma, address); \
- } \
__dirty; \
})
#define ptep_clear_flush_young(vma, address, ptep) \
({ \
int __young; \
- __young = pte_young(*(ptep)); \
- if (__young) { \
- clear_bit(_PAGE_BIT_ACCESSED, &(ptep)->pte_low); \
- pte_update_defer((vma)->vm_mm, (address), (ptep)); \
+ __young = ptep_test_and_clear_young((vma), (address), (ptep)); \
+ if (__young) \
flush_tlb_page(vma, address); \
- } \
__young; \
})
#define __HAVE_ARCH_PTEP_GET_AND_CLEAR
static inline pte_t ptep_get_and_clear(struct mm_struct *mm, unsigned long addr, pte_t *ptep)
{
- pte_t pte = raw_ptep_get_and_clear(ptep);
+ pte_t pte = native_ptep_get_and_clear(ptep);
pte_update(mm, addr, ptep);
return pte;
}
{
pte_t pte;
if (full) {
- pte = *ptep;
- pte_clear(mm, addr, ptep);
+ /*
+ * Full address destruction in progress; paravirt does not
+ * care about updates and native needs no locking
+ */
+ pte = native_local_ptep_get_and_clear(ptep);
} else {
pte = ptep_get_and_clear(mm, addr, ptep);
}
#if defined(CONFIG_HIGHPTE)
#define pte_offset_map(dir, address) \
- ((pte_t *)kmap_atomic(pmd_page(*(dir)),KM_PTE0) + pte_index(address))
+ ((pte_t *)kmap_atomic_pte(pmd_page(*(dir)),KM_PTE0) + pte_index(address))
#define pte_offset_map_nested(dir, address) \
- ((pte_t *)kmap_atomic(pmd_page(*(dir)),KM_PTE1) + pte_index(address))
+ ((pte_t *)kmap_atomic_pte(pmd_page(*(dir)),KM_PTE1) + pte_index(address))
#define pte_unmap(pte) kunmap_atomic(pte, KM_PTE0)
#define pte_unmap_nested(pte) kunmap_atomic(pte, KM_PTE1)
#else
#define io_remap_pfn_range(vma, vaddr, pfn, size, prot) \
remap_pfn_range(vma, vaddr, pfn, size, prot)
-#define MK_IOSPACE_PFN(space, pfn) (pfn)
-#define GET_IOSPACE(pfn) 0
-#define GET_PFN(pfn) (pfn)
-
#include <asm-generic/pgtable.h>
#endif /* _I386_PGTABLE_H */