x86: unify current_text_addr

current_text_addr() has a different implementation in x86_64 and
i386, but it is not fundamentally different. I stick to the i386
implementation, that seem to be a common base, and move it to processor.h
Signed-off-by: NGlauber de Oliveira Costa <gcosta@redhat.com>
Signed-off-by: NIngo Molnar <mingo@elte.hu>
Signed-off-by: NThomas Gleixner <tglx@linutronix.de>

include/asm-x86/processor.h

@@ -10,6 +10,17 @@ struct mm_struct;
 #include <asm/page.h>
 #include <asm/system.h>
 
+/*
+ * Default implementation of macro that returns current
+ * instruction pointer ("program counter").
+ */
+static inline void *current_text_addr(void)
+{
+	void *pc;
+	asm volatile("mov $1f,%0\n1:":"=r" (pc));
+	return pc;
+}
+
 static inline void native_cpuid(unsigned int *eax, unsigned int *ebx,
 					 unsigned int *ecx, unsigned int *edx)
 {

include/asm-x86/processor_32.h

@@ -21,12 +21,6 @@
 #include <linux/init.h>
 #include <asm/desc_defs.h>
 
-/*
- * Default implementation of macro that returns current
- * instruction pointer ("program counter").
- */
-#define current_text_addr() ({ void *pc; __asm__("movl $1f,%0\n1:":"=g" (pc)); pc; })
-
 /*
  *  CPU type and hardware bug flags. Kept separately for each CPU.
  *  Members of this structure are referenced in head.S, so think twice

include/asm-x86/processor_64.h

@@ -20,12 +20,6 @@
 #include <linux/cpumask.h>
 #include <asm/desc_defs.h>
 
-/*
- * Default implementation of macro that returns current
- * instruction pointer ("program counter").
- */
-#define current_text_addr() ({ void *pc; asm volatile("leaq 1f(%%rip),%0\n1:":"=r"(pc)); pc; })
-
 /*
  *  CPU type and hardware bug flags. Kept separately for each CPU.
  */