ia64: Add instruction_pointer_set() API

Add instruction_pointer_set() API for ia64.

Link: https://lkml.kernel.org/r/163163051195.489837.1039597819838213481.stgit@devnote2Signed-off-by: NMasami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: NSteven Rostedt (VMware) <rostedt@goodmis.org>

arch/ia64/include/asm/ptrace.h

@@ -51,6 +51,11 @@
  * the canonical representation by adding to instruction pointer.
  */
 # define instruction_pointer(regs) ((regs)->cr_iip + ia64_psr(regs)->ri)
+# define instruction_pointer_set(regs, val)	\
+({						\
+	ia64_psr(regs)->ri = (val & 0xf);	\
+	regs->cr_iip = (val & ~0xfULL);		\
+})
 
 static inline unsigned long user_stack_pointer(struct pt_regs *regs)
 {