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-rw-r--r--include/asm-i386/pgtable-3level.h14
1 files changed, 14 insertions, 0 deletions
diff --git a/include/asm-i386/pgtable-3level.h b/include/asm-i386/pgtable-3level.h
index 664bfee5a2f2..45b024181507 100644
--- a/include/asm-i386/pgtable-3level.h
+++ b/include/asm-i386/pgtable-3level.h
@@ -139,6 +139,17 @@ static inline void pud_clear (pud_t * pud) { }
139#define pmd_offset(pud, address) ((pmd_t *) pud_page(*(pud)) + \ 139#define pmd_offset(pud, address) ((pmd_t *) pud_page(*(pud)) + \
140 pmd_index(address)) 140 pmd_index(address))
141 141
142/* local pte updates need not use xchg for locking */
143static inline pte_t native_local_ptep_get_and_clear(pte_t *ptep)
144{
145 pte_t res;
146
147 res = *ptep;
148 native_pte_clear(NULL, 0, ptep);
149 return res;
150}
151
152#ifdef CONFIG_SMP
142static inline pte_t native_ptep_get_and_clear(pte_t *ptep) 153static inline pte_t native_ptep_get_and_clear(pte_t *ptep)
143{ 154{
144 pte_t res; 155 pte_t res;
@@ -150,6 +161,9 @@ static inline pte_t native_ptep_get_and_clear(pte_t *ptep)
150 161
151 return res; 162 return res;
152} 163}
164#else
165#define native_ptep_get_and_clear(xp) native_local_ptep_get_and_clear(xp)
166#endif
153 167
154#define __HAVE_ARCH_PTE_SAME 168#define __HAVE_ARCH_PTE_SAME
155static inline int pte_same(pte_t a, pte_t b) 169static inline int pte_same(pte_t a, pte_t b)