These changes are the raw update to linux-4.4.6-rt14. Kernel sources

are taken from kernel.org, and rt patch from the rt wiki download page.

During the rebasing, the following patch collided:

Force tick interrupt and get rid of softirq magic(I70131fb85).

Collisions have been removed because its logic was found on the
source already.

Change-Id: I7f57a4081d9deaa0d9ccfc41a6c8daccdee3b769
Signed-off-by: José Pekkarinen <jose.pekkarinen@nokia.com>

1 files changed, 66 insertions, 33 deletions

diff --git a/kernel/arch/mips/include/asm/uaccess.h b/kernel/arch/mips/include/asm/uaccess.h
index 9722357d2..095ecafe6 100644
--- a/kernel/arch/mips/include/asm/uaccess.h
+++ b/kernel/arch/mips/include/asm/uaccess.h
@@ -78,6 +78,21 @@ extern u64 __ua_limit;
 
 #define segment_eq(a, b)	((a).seg == (b).seg)
 
+/*
+ * eva_kernel_access() - determine whether kernel memory access on an EVA system
+ *
+ * Determines whether memory accesses should be performed to kernel memory
+ * on a system using Extended Virtual Addressing (EVA).
+ *
+ * Return: true if a kernel memory access on an EVA system, else false.
+ */
+static inline bool eva_kernel_access(void)
+{
+	if (!config_enabled(CONFIG_EVA))
+		return false;
+
+	return segment_eq(get_fs(), get_ds());
+}
 
 /*
  * Is a address valid? This does a straighforward calculation rather
@@ -286,7 +301,7 @@ do {									\
 ({									\
 	int __gu_err;							\
 									\
-	if (segment_eq(get_fs(), get_ds())) {				\
+	if (eva_kernel_access()) {					\
 		__get_kernel_common((x), size, ptr);			\
 	} else {							\
 		__chk_user_ptr(ptr);					\
@@ -302,7 +317,7 @@ do {									\
 									\
 	might_fault();							\
 	if (likely(access_ok(VERIFY_READ,  __gu_ptr, size))) {		\
-		if (segment_eq(get_fs(), get_ds()))			\
+		if (eva_kernel_access())				\
 			__get_kernel_common((x), size, __gu_ptr);	\
 		else							\
 			__get_user_common((x), size, __gu_ptr);		\
@@ -427,7 +442,7 @@ do {									\
 	int __pu_err = 0;						\
 									\
 	__pu_val = (x);							\
-	if (segment_eq(get_fs(), get_ds())) {				\
+	if (eva_kernel_access()) {					\
 		__put_kernel_common(ptr, size);				\
 	} else {							\
 		__chk_user_ptr(ptr);					\
@@ -444,7 +459,7 @@ do {									\
 									\
 	might_fault();							\
 	if (likely(access_ok(VERIFY_WRITE,  __pu_addr, size))) {	\
-		if (segment_eq(get_fs(), get_ds()))			\
+		if (eva_kernel_access())				\
 			__put_kernel_common(__pu_addr, size);		\
 		else							\
 			__put_user_common(__pu_addr, size);		\
@@ -584,7 +599,7 @@ extern void __put_user_unknown(void);
  * On error, the variable @x is set to zero.
  */
 #define __get_user_unaligned(x,ptr) \
-	__get_user__unalignednocheck((x),(ptr),sizeof(*(ptr)))
+	__get_user_unaligned_nocheck((x),(ptr),sizeof(*(ptr)))
 
 /*
  * Yuck.  We need two variants, one for 64bit operation and one
@@ -605,8 +620,8 @@ extern void __get_user_unaligned_unknown(void);
 do {									\
 	switch (size) {							\
 	case 1: __get_data_asm(val, "lb", ptr); break;			\
-	case 2: __get_user_unaligned_asm(val, "ulh", ptr); break;	\
-	case 4: __get_user_unaligned_asm(val, "ulw", ptr); break;	\
+	case 2: __get_data_unaligned_asm(val, "ulh", ptr); break;	\
+	case 4: __get_data_unaligned_asm(val, "ulw", ptr); break;	\
 	case 8: __GET_USER_UNALIGNED_DW(val, ptr); break;		\
 	default: __get_user_unaligned_unknown(); break;			\
 	}								\
@@ -843,7 +858,7 @@ extern size_t __copy_user(void *__to, const void *__from, size_t __n);
 	__cu_from = (from);						\
 	__cu_len = (n);							\
 	might_fault();							\
-	if (segment_eq(get_fs(), get_ds()))				\
+	if (eva_kernel_access())					\
 		__cu_len = __invoke_copy_to_kernel(__cu_to, __cu_from,	\
 						   __cu_len);		\
 	else								\
@@ -863,7 +878,7 @@ extern size_t __copy_user_inatomic(void *__to, const void *__from, size_t __n);
 	__cu_to = (to);							\
 	__cu_from = (from);						\
 	__cu_len = (n);							\
-	if (segment_eq(get_fs(), get_ds()))				\
+	if (eva_kernel_access())					\
 		__cu_len = __invoke_copy_to_kernel(__cu_to, __cu_from,	\
 						   __cu_len);		\
 	else								\
@@ -881,7 +896,7 @@ extern size_t __copy_user_inatomic(void *__to, const void *__from, size_t __n);
 	__cu_to = (to);							\
 	__cu_from = (from);						\
 	__cu_len = (n);							\
-	if (segment_eq(get_fs(), get_ds()))				\
+	if (eva_kernel_access())					\
 		__cu_len = __invoke_copy_from_kernel_inatomic(__cu_to,	\
 							      __cu_from,\
 							      __cu_len);\
@@ -915,7 +930,7 @@ extern size_t __copy_user_inatomic(void *__to, const void *__from, size_t __n);
 	__cu_to = (to);							\
 	__cu_from = (from);						\
 	__cu_len = (n);							\
-	if (segment_eq(get_fs(), get_ds())) {				\
+	if (eva_kernel_access()) {					\
 		__cu_len = __invoke_copy_to_kernel(__cu_to,		\
 						   __cu_from,		\
 						   __cu_len);		\
@@ -1107,9 +1122,15 @@ extern size_t __copy_in_user_eva(void *__to, const void *__from, size_t __n);
 	__cu_to = (to);							\
 	__cu_from = (from);						\
 	__cu_len = (n);							\
-	might_fault();							\
-	__cu_len = __invoke_copy_from_user(__cu_to, __cu_from,		\
-					   __cu_len);			\
+	if (eva_kernel_access()) {					\
+		__cu_len = __invoke_copy_from_kernel(__cu_to,		\
+						     __cu_from,		\
+						     __cu_len);		\
+	} else {							\
+		might_fault();						\
+		__cu_len = __invoke_copy_from_user(__cu_to, __cu_from,	\
+						   __cu_len);		\
+	}								\
 	__cu_len;							\
 })
 
@@ -1139,7 +1160,7 @@ extern size_t __copy_in_user_eva(void *__to, const void *__from, size_t __n);
 	__cu_to = (to);							\
 	__cu_from = (from);						\
 	__cu_len = (n);							\
-	if (segment_eq(get_fs(), get_ds())) {				\
+	if (eva_kernel_access()) {					\
 		__cu_len = __invoke_copy_from_kernel(__cu_to,		\
 						     __cu_from,		\
 						     __cu_len);		\
@@ -1163,7 +1184,7 @@ extern size_t __copy_in_user_eva(void *__to, const void *__from, size_t __n);
 	__cu_to = (to);							\
 	__cu_from = (from);						\
 	__cu_len = (n);							\
-	if (segment_eq(get_fs(), get_ds())) {				\
+	if (eva_kernel_access()) {					\
 		__cu_len = ___invoke_copy_in_kernel(__cu_to, __cu_from,	\
 						    __cu_len);		\
 	} else {							\
@@ -1183,7 +1204,7 @@ extern size_t __copy_in_user_eva(void *__to, const void *__from, size_t __n);
 	__cu_to = (to);							\
 	__cu_from = (from);						\
 	__cu_len = (n);							\
-	if (segment_eq(get_fs(), get_ds())) {				\
+	if (eva_kernel_access()) {					\
 		__cu_len = ___invoke_copy_in_kernel(__cu_to,__cu_from,	\
 						    __cu_len);		\
 	} else {							\
@@ -1214,16 +1235,28 @@ __clear_user(void __user *addr, __kernel_size_t size)
 {
 	__kernel_size_t res;
 
-	might_fault();
-	__asm__ __volatile__(
-		"move\t$4, %1\n\t"
-		"move\t$5, $0\n\t"
-		"move\t$6, %2\n\t"
-		__MODULE_JAL(__bzero)
-		"move\t%0, $6"
-		: "=r" (res)
-		: "r" (addr), "r" (size)
-		: "$4", "$5", "$6", __UA_t0, __UA_t1, "$31");
+	if (eva_kernel_access()) {
+		__asm__ __volatile__(
+			"move\t$4, %1\n\t"
+			"move\t$5, $0\n\t"
+			"move\t$6, %2\n\t"
+			__MODULE_JAL(__bzero_kernel)
+			"move\t%0, $6"
+			: "=r" (res)
+			: "r" (addr), "r" (size)
+			: "$4", "$5", "$6", __UA_t0, __UA_t1, "$31");
+	} else {
+		might_fault();
+		__asm__ __volatile__(
+			"move\t$4, %1\n\t"
+			"move\t$5, $0\n\t"
+			"move\t$6, %2\n\t"
+			__MODULE_JAL(__bzero)
+			"move\t%0, $6"
+			: "=r" (res)
+			: "r" (addr), "r" (size)
+			: "$4", "$5", "$6", __UA_t0, __UA_t1, "$31");
+	}
 
 	return res;
 }
@@ -1263,7 +1296,7 @@ __strncpy_from_user(char *__to, const char __user *__from, long __len)
 {
 	long res;
 
-	if (segment_eq(get_fs(), get_ds())) {
+	if (eva_kernel_access()) {
 		__asm__ __volatile__(
 			"move\t$4, %1\n\t"
 			"move\t$5, %2\n\t"
@@ -1312,7 +1345,7 @@ strncpy_from_user(char *__to, const char __user *__from, long __len)
 {
 	long res;
 
-	if (segment_eq(get_fs(), get_ds())) {
+	if (eva_kernel_access()) {
 		__asm__ __volatile__(
 			"move\t$4, %1\n\t"
 			"move\t$5, %2\n\t"
@@ -1357,7 +1390,7 @@ static inline long strlen_user(const char __user *s)
 {
 	long res;
 
-	if (segment_eq(get_fs(), get_ds())) {
+	if (eva_kernel_access()) {
 		__asm__ __volatile__(
 			"move\t$4, %1\n\t"
 			__MODULE_JAL(__strlen_kernel_asm)
@@ -1369,7 +1402,7 @@ static inline long strlen_user(const char __user *s)
 		might_fault();
 		__asm__ __volatile__(
 			"move\t$4, %1\n\t"
-			__MODULE_JAL(__strlen_kernel_asm)
+			__MODULE_JAL(__strlen_user_asm)
 			"move\t%0, $2"
 			: "=r" (res)
 			: "r" (s)
@@ -1384,7 +1417,7 @@ static inline long __strnlen_user(const char __user *s, long n)
 {
 	long res;
 
-	if (segment_eq(get_fs(), get_ds())) {
+	if (eva_kernel_access()) {
 		__asm__ __volatile__(
 			"move\t$4, %1\n\t"
 			"move\t$5, %2\n\t"
@@ -1426,7 +1459,7 @@ static inline long strnlen_user(const char __user *s, long n)
 	long res;
 
 	might_fault();
-	if (segment_eq(get_fs(), get_ds())) {
+	if (eva_kernel_access()) {
 		__asm__ __volatile__(
 			"move\t$4, %1\n\t"
 			"move\t$5, %2\n\t"