diff options
Diffstat (limited to 'include/asm-i386/pgtable.h')
| -rw-r--r-- | include/asm-i386/pgtable.h | 17 |
1 files changed, 15 insertions, 2 deletions
diff --git a/include/asm-i386/pgtable.h b/include/asm-i386/pgtable.h index 00e97a9d367..c6b8b944120 100644 --- a/include/asm-i386/pgtable.h +++ b/include/asm-i386/pgtable.h @@ -269,6 +269,16 @@ extern void vmalloc_sync_all(void); #define pte_update_defer(mm, addr, ptep) do { } while (0) #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 @@ -343,8 +353,11 @@ static inline pte_t ptep_get_and_clear_full(struct mm_struct *mm, unsigned long { pte_t pte; if (full) { - pte = *ptep; - native_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); } |