sh: correct definitions to access stack pointers

A definition like:

#define regs_return_value(regs)	((regs)->regs[0])

called with regs_return_value(foo) will be preprocessed to:

((foo)->foo[0])
        ^^^
So to fix this to ensure the preprocessor compiles such calls correctly.
Signed-off-by: NRoel Kluin <roel.kluin@gmail.com>
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

arch/sh/include/asm/ptrace.h

@@ -40,8 +40,8 @@
 #include <asm/system.h>
 
 #define user_mode(regs)			(((regs)->sr & 0x40000000)==0)
-#define user_stack_pointer(regs)	((unsigned long)(regs)->regs[15])
-#define kernel_stack_pointer(regs)	((unsigned long)(regs)->regs[15])
+#define user_stack_pointer(_regs)	((unsigned long)(_regs)->regs[15])
+#define kernel_stack_pointer(_regs)	((unsigned long)(_regs)->regs[15])
 #define instruction_pointer(regs)	((unsigned long)(regs)->pc)
 
 extern void show_regs(struct pt_regs *);

arch/sh/include/asm/ptrace_32.h

@@ -76,7 +76,7 @@ struct pt_dspregs {
 #ifdef __KERNEL__
 
 #define MAX_REG_OFFSET		offsetof(struct pt_regs, tra)
-#define regs_return_value(regs)	((regs)->regs[0])
+#define regs_return_value(_regs)	((_regs)->regs[0])
 
 #endif /* __KERNEL__ */
 

arch/sh/include/asm/ptrace_64.h

@@ -13,7 +13,7 @@ struct pt_regs {
 #ifdef __KERNEL__
 
 #define MAX_REG_OFFSET		offsetof(struct pt_regs, tregs[7])
-#define regs_return_value(regs)	((regs)->regs[3])
+#define regs_return_value(_regs)	((_regs)->regs[3])
 
 #endif /* __KERNEL__ */