x86: move desc_empty to where they belong

This patch moves the (duplicated) desc_empty implementation to desc.h,
where the descriptor things belong.

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

include/asm-x86/desc.h

@@ -71,6 +71,12 @@ static inline void pack_gate(gate_desc *gate, unsigned char type,
 
 #endif
 
+static inline int desc_empty(const void *ptr)
+{
+	const u32 *desc = ptr;
+	return !(desc[0] | desc[1]);
+}
+
 #ifdef CONFIG_PARAVIRT
 #include <asm/paravirt.h>
 #else

include/asm-x86/processor_32.h

@@ -21,12 +21,6 @@
 #include <linux/init.h>
 #include <asm/desc_defs.h>
 
-static inline int desc_empty(const void *ptr)
-{
-	const u32 *desc = ptr;
-	return !(desc[0] | desc[1]);
-}
-
 /*
  * Default implementation of macro that returns current
  * instruction pointer ("program counter").

include/asm-x86/processor_64.h

@@ -20,12 +20,6 @@
 #include <linux/cpumask.h>
 #include <asm/desc_defs.h>
 
-static inline int desc_empty(const void *ptr)
-{
-	const u32 *desc = ptr;
-	return !(desc[0] | desc[1]);
-}
-
 /*
  * Default implementation of macro that returns current
  * instruction pointer ("program counter").