new helper: uaccess_kernel()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

4 files changed, 10 insertions, 10 deletions

diff --git a/arch/mips/include/asm/checksum.h b/arch/mips/include/asm/checksum.h
index c8b574f7e0cc..77cad232a1c6 100644
--- a/arch/mips/include/asm/checksum.h
+++ b/arch/mips/include/asm/checksum.h
@@ -50,7 +50,7 @@ __wsum csum_partial_copy_from_user(const void __user *src, void *dst, int len,
 				   __wsum sum, int *err_ptr)
 {
 	might_fault();
-	if (segment_eq(get_fs(), get_ds()))
+	if (uaccess_kernel())
 		return __csum_partial_copy_kernel((__force void *)src, dst,
 						  len, sum, err_ptr);
 	else
@@ -82,7 +82,7 @@ __wsum csum_and_copy_to_user(const void *src, void __user *dst, int len,
 {
 	might_fault();
 	if (access_ok(VERIFY_WRITE, dst, len)) {
-		if (segment_eq(get_fs(), get_ds()))
+		if (uaccess_kernel())
 			return __csum_partial_copy_kernel(src,
 							  (__force void *)dst,
 							  len, sum, err_ptr);
diff --git a/arch/mips/include/asm/r4kcache.h b/arch/mips/include/asm/r4kcache.h
index 55fd94e6cd0b..7f12d7e27c94 100644
--- a/arch/mips/include/asm/r4kcache.h
+++ b/arch/mips/include/asm/r4kcache.h
@@ -20,7 +20,7 @@
 #include <asm/cpu-features.h>
 #include <asm/cpu-type.h>
 #include <asm/mipsmtregs.h>
-#include <linux/uaccess.h> /* for segment_eq() */
+#include <linux/uaccess.h> /* for uaccess_kernel() */
 
 extern void (*r4k_blast_dcache)(void);
 extern void (*r4k_blast_icache)(void);
@@ -714,7 +714,7 @@ static inline void protected_blast_##pfx##cache##_range(unsigned long start,\
 									\
 	__##pfx##flush_prologue						\
 									\
-	if (segment_eq(get_fs(), USER_DS)) {				\
+	if (!uaccess_kernel()) {					\
 		while (1) {						\
 			protected_cachee_op(hitop, addr);		\
 			if (addr == aend)				\
diff --git a/arch/mips/include/asm/uaccess.h b/arch/mips/include/asm/uaccess.h
index dd25b312c973..70ca8eee166a 100644
--- a/arch/mips/include/asm/uaccess.h
+++ b/arch/mips/include/asm/uaccess.h
@@ -88,7 +88,7 @@ static inline bool eva_kernel_access(void)
 	if (!IS_ENABLED(CONFIG_EVA))
 		return false;
 
-	return segment_eq(get_fs(), get_ds());
+	return uaccess_kernel();
 }
 
 /*
diff --git a/arch/mips/kernel/unaligned.c b/arch/mips/kernel/unaligned.c
index 7ed98354fe9d..f806ee56e639 100644
--- a/arch/mips/kernel/unaligned.c
+++ b/arch/mips/kernel/unaligned.c
@@ -1026,7 +1026,7 @@ static void emulate_load_store_insn(struct pt_regs *regs,
 			goto sigbus;
 
 		if (IS_ENABLED(CONFIG_EVA)) {
-			if (segment_eq(get_fs(), get_ds()))
+			if (uaccess_kernel())
 				LoadHW(addr, value, res);
 			else
 				LoadHWE(addr, value, res);
@@ -1045,7 +1045,7 @@ static void emulate_load_store_insn(struct pt_regs *regs,
 			goto sigbus;
 
 		if (IS_ENABLED(CONFIG_EVA)) {
-			if (segment_eq(get_fs(), get_ds()))
+			if (uaccess_kernel())
 				LoadW(addr, value, res);
 			else
 				LoadWE(addr, value, res);
@@ -1064,7 +1064,7 @@ static void emulate_load_store_insn(struct pt_regs *regs,
 			goto sigbus;
 
 		if (IS_ENABLED(CONFIG_EVA)) {
-			if (segment_eq(get_fs(), get_ds()))
+			if (uaccess_kernel())
 				LoadHWU(addr, value, res);
 			else
 				LoadHWUE(addr, value, res);
@@ -1132,7 +1132,7 @@ static void emulate_load_store_insn(struct pt_regs *regs,
 		value = regs->regs[insn.i_format.rt];
 
 		if (IS_ENABLED(CONFIG_EVA)) {
-			if (segment_eq(get_fs(), get_ds()))
+			if (uaccess_kernel())
 				StoreHW(addr, value, res);
 			else
 				StoreHWE(addr, value, res);
@@ -1152,7 +1152,7 @@ static void emulate_load_store_insn(struct pt_regs *regs,
 		value = regs->regs[insn.i_format.rt];
 
 		if (IS_ENABLED(CONFIG_EVA)) {
-			if (segment_eq(get_fs(), get_ds()))
+			if (uaccess_kernel())
 				StoreW(addr, value, res);
 			else
 				StoreWE(addr, value, res);