diff --git a/[refs] b/[refs]
index 4e0eb9c214c5..db445c8b61cf 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 03d72aa18f15df9987fe5837284e15b9ccf6e3f8
+refs/heads/master: ef354af4629e5cc76a3f64fc46d452f2b56d5a59
diff --git a/trunk/arch/x86/mm/pageattr.c b/trunk/arch/x86/mm/pageattr.c
index 938df5e8402b..270cab2e6030 100644
--- a/trunk/arch/x86/mm/pageattr.c
+++ b/trunk/arch/x86/mm/pageattr.c
@@ -787,6 +787,25 @@ int set_memory_uc(unsigned long addr, int numpages)
 }
 EXPORT_SYMBOL(set_memory_uc);
 
+int _set_memory_wc(unsigned long addr, int numpages)
+{
+	return change_page_attr_set(addr, numpages,
+				    __pgprot(_PAGE_CACHE_WC));
+}
+
+int set_memory_wc(unsigned long addr, int numpages)
+{
+	if (!pat_wc_enabled)
+		return set_memory_uc(addr, numpages);
+
+	if (reserve_memtype(addr, addr + numpages * PAGE_SIZE,
+		_PAGE_CACHE_WC, NULL))
+		return -EINVAL;
+
+	return _set_memory_wc(addr, numpages);
+}
+EXPORT_SYMBOL(set_memory_wc);
+
 int _set_memory_wb(unsigned long addr, int numpages)
 {
 	return change_page_attr_clear(addr, numpages,
diff --git a/trunk/include/asm-x86/cacheflush.h b/trunk/include/asm-x86/cacheflush.h
index 5676fba10a09..90437d3f7610 100644
--- a/trunk/include/asm-x86/cacheflush.h
+++ b/trunk/include/asm-x86/cacheflush.h
@@ -35,8 +35,10 @@ int set_pages_ro(struct page *page, int numpages);
 int set_pages_rw(struct page *page, int numpages);
 
 int _set_memory_uc(unsigned long addr, int numpages);
+int _set_memory_wc(unsigned long addr, int numpages);
 int _set_memory_wb(unsigned long addr, int numpages);
 int set_memory_uc(unsigned long addr, int numpages);
+int set_memory_wc(unsigned long addr, int numpages);
 int set_memory_wb(unsigned long addr, int numpages);
 int set_memory_x(unsigned long addr, int numpages);
 int set_memory_nx(unsigned long addr, int numpages);