x86/apic: Deinline x2apic functions

These inline functions are used in both the cluster and the physical x2apic
code to fill in the function pointers of the apic structure. That means the
code is generated twice for no reason.

Move it to a C code and reuse it.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Juergen Gross <jgross@suse.com>
Tested-by: Yu Chen <yu.c.chen@intel.com>
Acked-by: Juergen Gross <jgross@suse.com>
Cc: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Marc Zyngier <marc.zyngier@arm.com>
Cc: Alok Kataria <akataria@vmware.com>
Cc: Joerg Roedel <joro@8bytes.org>
Cc: "Rafael J. Wysocki" <rjw@rjwysocki.net>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Rui Zhang <rui.zhang@intel.com>
Cc: "K. Y. Srinivasan" <kys@microsoft.com>
Cc: Arjan van de Ven <arjan@linux.intel.com>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: Len Brown <lenb@kernel.org>
Link: https://lkml.kernel.org/r/20170913213153.358954066@linutronix.de

arch/x86/include/asm/x2apic.h

-/*
- * Common bits for X2APIC cluster/physical modes.
- */
-
-#ifndef _ASM_X86_X2APIC_H
-#define _ASM_X86_X2APIC_H
-
-#include <asm/apic.h>
-#include <asm/ipi.h>
-#include <linux/cpumask.h>
-
-static int x2apic_apic_id_valid(int apicid)
-{
-	return 1;
-}
-
-static int x2apic_apic_id_registered(void)
-{
-	return 1;
-}
-
-static void
-__x2apic_send_IPI_dest(unsigned int apicid, int vector, unsigned int dest)
-{
-	unsigned long cfg = __prepare_ICR(0, vector, dest);
-	native_x2apic_icr_write(cfg, apicid);
-}
-
-static unsigned int x2apic_get_apic_id(unsigned long id)
-{
-	return id;
-}
-
-static unsigned long x2apic_set_apic_id(unsigned int id)
-{
-	return id;
-}
-
-static int x2apic_phys_pkg_id(int initial_apicid, int index_msb)
-{
-	return initial_apicid >> index_msb;
-}
-
-static void x2apic_send_IPI_self(int vector)
-{
-	apic_write(APIC_SELF_IPI, vector);
-}
-
-#endif /* _ASM_X86_X2APIC_H */

arch/x86/kernel/apic/x2apic.h

+/* Common bits for X2APIC cluster/physical modes. */
+
+int x2apic_apic_id_valid(int apicid);
+int x2apic_apic_id_registered(void);
+void __x2apic_send_IPI_dest(unsigned int apicid, int vector, unsigned int dest);
+unsigned int x2apic_get_apic_id(unsigned long id);
+unsigned long x2apic_set_apic_id(unsigned int id);
+int x2apic_phys_pkg_id(int initial_apicid, int index_msb);
+void x2apic_send_IPI_self(int vector);

arch/x86/kernel/apic/x2apic_cluster.c

@@ -8,7 +8,7 @@
 #include <linux/cpu.h>
 
 #include <asm/smp.h>
-#include <asm/x2apic.h>
+#include "x2apic.h"
 
 static DEFINE_PER_CPU(u32, x86_cpu_to_logical_apicid);
 static DEFINE_PER_CPU(cpumask_var_t, cpus_in_cluster);

arch/x86/kernel/apic/x2apic_phys.c

@@ -6,7 +6,8 @@
 #include <linux/dmar.h>
 
 #include <asm/smp.h>
-#include <asm/x2apic.h>
+#include <asm/ipi.h>
+#include "x2apic.h"
 
 int x2apic_phys;
 
@@ -98,6 +99,43 @@ static int x2apic_phys_probe(void)
 	return apic == &apic_x2apic_phys;
 }
 
+/* Common x2apic functions, also used by x2apic_cluster */
+int x2apic_apic_id_valid(int apicid)
+{
+	return 1;
+}
+
+int x2apic_apic_id_registered(void)
+{
+	return 1;
+}
+
+void __x2apic_send_IPI_dest(unsigned int apicid, int vector, unsigned int dest)
+{
+	unsigned long cfg = __prepare_ICR(0, vector, dest);
+	native_x2apic_icr_write(cfg, apicid);
+}
+
+unsigned int x2apic_get_apic_id(unsigned long id)
+{
+	return id;
+}
+
+unsigned long x2apic_set_apic_id(unsigned int id)
+{
+	return id;
+}
+
+int x2apic_phys_pkg_id(int initial_apicid, int index_msb)
+{
+	return initial_apicid >> index_msb;
+}
+
+void x2apic_send_IPI_self(int vector)
+{
+	apic_write(APIC_SELF_IPI, vector);
+}
+
 static struct apic apic_x2apic_phys __ro_after_init = {
 
 	.name				= "physical x2apic",