diff options
Diffstat (limited to 'include/asm-i386/pgtable-2level.h')
| -rw-r--r-- | include/asm-i386/pgtable-2level.h | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/include/asm-i386/pgtable-2level.h b/include/asm-i386/pgtable-2level.h index 85d9005c0cd..3daab67cd36 100644 --- a/include/asm-i386/pgtable-2level.h +++ b/include/asm-i386/pgtable-2level.h @@ -41,10 +41,24 @@ static inline void native_pte_clear(struct mm_struct *mm, unsigned long addr, pt *xp = __pte(0); } +/* 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; + + res = *ptep; + native_pte_clear(NULL, 0, ptep); + return res; +} + +#ifdef CONFIG_SMP static inline pte_t native_ptep_get_and_clear(pte_t *xp) { return __pte(xchg(&xp->pte_low, 0)); } +#else +#define native_ptep_get_and_clear(xp) native_local_ptep_get_and_clear(xp) +#endif #define pte_page(x) pfn_to_page(pte_pfn(x)) #define pte_none(x) (!(x).pte_low) |