---

yaml --- r: 53914 b: refs/heads/master c: 142dd97 h: refs/heads/master v: v3
git-mirror · May 2, 2007 · 4f5f2a6 · 4f5f2a6
1 parent 047bf27
commit 4f5f2a6
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Showing 3 changed files with 29 additions and 1 deletion.
diff --git a/[refs] b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: c2c1accd4b2f9c82fb89d40611c7f581948db255
+refs/heads/master: 142dd975911fdd82b1b6f6617cd20ac90a8ccf00
diff --git a/trunk/include/asm-i386/pgtable-2level.h b/trunk/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)

diff --git a/trunk/include/asm-i386/pgtable-3level.h b/trunk/include/asm-i386/pgtable-3level.h
@@ -139,6 +139,17 @@ static inline void pud_clear (pud_t * pud) { }
 #define pmd_offset(pud, address) ((pmd_t *) pud_page(*(pud)) + \
 			pmd_index(address))
 
+/* 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 *ptep)
 {
 	pte_t res;
@@ -150,6 +161,9 @@ static inline pte_t native_ptep_get_and_clear(pte_t *ptep)
 
 	return res;
 }
+#else
+#define native_ptep_get_and_clear(xp) native_local_ptep_get_and_clear(xp)
+#endif
 
 #define __HAVE_ARCH_PTE_SAME
 static inline int pte_same(pte_t a, pte_t b)