---

yaml
---
r: 136903
b: refs/heads/master
c: 30d697f
h: refs/heads/master
i:
  136901: 26b342b
  136899: 1fd9220
  136895: 3041617
v: v3

[refs]

@@ -1,2 +1,2 @@
 ---
-refs/heads/master: cb425afd2183e90a481bb211ff49361a117a3ecc
+refs/heads/master: 30d697fa3a25fed809a873b17531a00282dc1234

trunk/arch/x86/include/asm/uaccess_64.h

@@ -192,14 +192,26 @@ static inline int __copy_from_user_nocache(void *dst, const void __user *src,
 					   unsigned size)
 {
 	might_sleep();
-	return __copy_user_nocache(dst, src, size, 1);
+	/*
+	 * In practice this limit means that large file write()s
+	 * which get chunked to 4K copies get handled via
+	 * non-temporal stores here. Smaller writes get handled
+	 * via regular __copy_from_user():
+	 */
+	if (likely(size >= PAGE_SIZE))
+		return __copy_user_nocache(dst, src, size, 1);
+	else
+		return __copy_from_user(dst, src, size);
 }
 
 static inline int __copy_from_user_inatomic_nocache(void *dst,
 						    const void __user *src,
 						    unsigned size)
 {
-	return __copy_user_nocache(dst, src, size, 0);
+	if (likely(size >= PAGE_SIZE))
+		return __copy_user_nocache(dst, src, size, 0);
+	else
+		return __copy_from_user_inatomic(dst, src, size);
 }
 
 unsigned long