3 files changed, 10 insertions, 22 deletions

diff --git a/arch/x86/kernel/fpu/regset.c b/arch/x86/kernel/fpu/regset.c
index 785302c75f38..caf723f31737 100644
--- a/arch/x86/kernel/fpu/regset.c
+++ b/arch/x86/kernel/fpu/regset.c
@@ -138,7 +138,7 @@ int xstateregs_set(struct task_struct *target, const struct user_regset *regset,
 		if (kbuf)
 			ret = copy_kernel_to_xstate(kbuf, xsave);
 		else
-			ret = copy_user_to_xstate(kbuf, ubuf, xsave);
+			ret = copy_user_to_xstate(ubuf, xsave);
 	} else {
 		ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, xsave, 0, -1);
 	}
diff --git a/arch/x86/kernel/fpu/signal.c b/arch/x86/kernel/fpu/signal.c
index b1fe9a1fc4e0..2c685b492fd6 100644
--- a/arch/x86/kernel/fpu/signal.c
+++ b/arch/x86/kernel/fpu/signal.c
@@ -323,13 +323,10 @@ static int __fpu__restore_sig(void __user *buf, void __user *buf_fx, int size)
 		 */
 		fpu__drop(fpu);
 
-		if (using_compacted_format()) {
-			err = copy_user_to_xstate(NULL, buf_fx,
-					       &fpu->state.xsave);
-		} else {
-			err = __copy_from_user(&fpu->state.xsave,
-					       buf_fx, state_size);
-		}
+		if (using_compacted_format())
+			err = copy_user_to_xstate(buf_fx, &fpu->state.xsave);
+		else
+			err = __copy_from_user(&fpu->state.xsave, buf_fx, state_size);
 
 		if (err || __copy_from_user(&env, buf, sizeof(env))) {
 			fpstate_init(&fpu->state);
diff --git a/arch/x86/kernel/fpu/xstate.c b/arch/x86/kernel/fpu/xstate.c
index 71cc8d367fdd..b1f3e4dae2e3 100644
--- a/arch/x86/kernel/fpu/xstate.c
+++ b/arch/x86/kernel/fpu/xstate.c
@@ -1142,8 +1142,7 @@ int copy_kernel_to_xstate(const void *kbuf, struct xregs_state *xsave)
  * there we check the CPU has XSAVES and a whole standard-sized buffer
  * exists.
  */
-int copy_user_to_xstate(const void *kbuf, const void __user *ubuf,
-		     struct xregs_state *xsave)
+int copy_user_to_xstate(const void __user *ubuf, struct xregs_state *xsave)
 {
 	unsigned int offset, size;
 	int i;
@@ -1153,12 +1152,8 @@ int copy_user_to_xstate(const void *kbuf, const void __user *ubuf,
 	offset = offsetof(struct xregs_state, header);
 	size = sizeof(xfeatures);
 
-	if (kbuf) {
-		memcpy(&xfeatures, kbuf + offset, size);
-	} else {
-		if (__copy_from_user(&xfeatures, ubuf + offset, size))
-			return -EFAULT;
-	}
+	if (__copy_from_user(&xfeatures, ubuf + offset, size))
+		return -EFAULT;
 
 	/*
 	 * Reject if the user sets any disabled or supervisor features:
@@ -1177,12 +1172,8 @@ int copy_user_to_xstate(const void *kbuf, const void __user *ubuf,
 			offset = xstate_offsets[i];
 			size = xstate_sizes[i];
 
-			if (kbuf) {
-				memcpy(dst, kbuf + offset, size);
-			} else {
-				if (__copy_from_user(dst, ubuf + offset, size))
-					return -EFAULT;
-			}
+			if (__copy_from_user(dst, ubuf + offset, size))
+				return -EFAULT;
 		}
 	}