---

yaml
---
r: 326243
b: refs/heads/master
c: e139e95
h: refs/heads/master
i:
  326241: 139be74
  326239: 69149e6
v: v3

[refs]

@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 49b8c695e331c9685e6ffdbf34872509d77c8459
+refs/heads/master: e139e95590dfebab81841bf7a3ac46500f51a47c

trunk/arch/x86/include/asm/fpu-internal.h

@@ -181,11 +181,28 @@ static inline int fxrstor_checking(struct i387_fxsave_struct *fx)
 			  "m" (*fx));
 }
 
+static inline int fxrstor_user(struct i387_fxsave_struct __user *fx)
+{
+	if (config_enabled(CONFIG_X86_32))
+		return user_insn(fxrstor %[fx], "=m" (*fx), [fx] "m" (*fx));
+	else if (config_enabled(CONFIG_AS_FXSAVEQ))
+		return user_insn(fxrstorq %[fx], "=m" (*fx), [fx] "m" (*fx));
+
+	/* See comment in fpu_fxsave() below. */
+	return user_insn(rex64/fxrstor (%[fx]), "=m" (*fx), [fx] "R" (fx),
+			  "m" (*fx));
+}
+
 static inline int frstor_checking(struct i387_fsave_struct *fx)
 {
 	return check_insn(frstor %[fx], "=m" (*fx), [fx] "m" (*fx));
 }
 
+static inline int frstor_user(struct i387_fsave_struct __user *fx)
+{
+	return user_insn(frstor %[fx], "=m" (*fx), [fx] "m" (*fx));
+}
+
 static inline void fpu_fxsave(struct fpu *fpu)
 {
 	if (config_enabled(CONFIG_X86_32))

trunk/arch/x86/kernel/xsave.c

@@ -315,17 +315,17 @@ static inline int restore_user_xstate(void __user *buf, u64 xbv, int fx_only)
 		if ((unsigned long)buf % 64 || fx_only) {
 			u64 init_bv = pcntxt_mask & ~XSTATE_FPSSE;
 			xrstor_state(init_xstate_buf, init_bv);
-			return fxrstor_checking((__force void *) buf);
+			return fxrstor_user(buf);
 		} else {
 			u64 init_bv = pcntxt_mask & ~xbv;
 			if (unlikely(init_bv))
 				xrstor_state(init_xstate_buf, init_bv);
 			return xrestore_user(buf, xbv);
 		}
 	} else if (use_fxsr()) {
-		return fxrstor_checking((__force void *) buf);
+		return fxrstor_user(buf);
 	} else
-		return frstor_checking((__force void *) buf);
+		return frstor_user(buf);
 }
 
 int __restore_xstate_sig(void __user *buf, void __user *buf_fx, int size)