x86, smp: refactor ->smp_callin_clear_local_apic() methods

Only NUMAQ does something substantial here, because it initializes
via NMIs (not via INIT as standard SMP startup) - so it needs to
reset the APIC.

 - extend the generic code to handle NULL methods

 - clear out dummy methods and replace them with NULL

 - clean up: remove wrapper macros, etc.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
diff --git a/arch/x86/mach-generic/bigsmp.c b/arch/x86/mach-generic/bigsmp.c
index 40910bf..bd069e7 100644
--- a/arch/x86/mach-generic/bigsmp.c
+++ b/arch/x86/mach-generic/bigsmp.c
@@ -109,7 +109,8 @@
 
 	.wait_for_init_deassert		= default_wait_for_init_deassert,
 
-	.smp_callin_clear_local_apic	= smp_callin_clear_local_apic,
+	.smp_callin_clear_local_apic	= NULL,
+
 	.store_NMI_vector		= store_NMI_vector,
 	.restore_NMI_vector		= restore_NMI_vector,
 	.inquire_remote_apic		= inquire_remote_apic,
diff --git a/arch/x86/mach-generic/default.c b/arch/x86/mach-generic/default.c
index c246484..a25e6ef 100644
--- a/arch/x86/mach-generic/default.c
+++ b/arch/x86/mach-generic/default.c
@@ -90,7 +90,7 @@
 
 	.wait_for_init_deassert		= default_wait_for_init_deassert,
 
-	.smp_callin_clear_local_apic	= smp_callin_clear_local_apic,
+	.smp_callin_clear_local_apic	= NULL,
 	.store_NMI_vector		= store_NMI_vector,
 	.restore_NMI_vector		= restore_NMI_vector,
 	.inquire_remote_apic		= inquire_remote_apic,
diff --git a/arch/x86/mach-generic/es7000.c b/arch/x86/mach-generic/es7000.c
index 4cb3984..ab41b54 100644
--- a/arch/x86/mach-generic/es7000.c
+++ b/arch/x86/mach-generic/es7000.c
@@ -145,7 +145,9 @@
 
 	.wait_for_init_deassert		= default_wait_for_init_deassert,
 
-	.smp_callin_clear_local_apic	= smp_callin_clear_local_apic,
+	/* Nothing to do for most platforms, since cleared by the INIT cycle: */
+	.smp_callin_clear_local_apic	= NULL,
+
 	.store_NMI_vector		= store_NMI_vector,
 	.restore_NMI_vector		= restore_NMI_vector,
 	.inquire_remote_apic		= inquire_remote_apic,
diff --git a/arch/x86/mach-generic/numaq.c b/arch/x86/mach-generic/numaq.c
index fb03867..4d3924f 100644
--- a/arch/x86/mach-generic/numaq.c
+++ b/arch/x86/mach-generic/numaq.c
@@ -110,7 +110,7 @@
 	/* We don't do anything here because we use NMI's to boot instead */
 	.wait_for_init_deassert		= NULL,
 
-	.smp_callin_clear_local_apic	= smp_callin_clear_local_apic,
+	.smp_callin_clear_local_apic	= numaq_smp_callin_clear_local_apic,
 	.store_NMI_vector		= store_NMI_vector,
 	.restore_NMI_vector		= restore_NMI_vector,
 	.inquire_remote_apic		= inquire_remote_apic,
diff --git a/arch/x86/mach-generic/summit.c b/arch/x86/mach-generic/summit.c
index fdca78b9..2595baa 100644
--- a/arch/x86/mach-generic/summit.c
+++ b/arch/x86/mach-generic/summit.c
@@ -89,7 +89,8 @@
 
 	.wait_for_init_deassert		= default_wait_for_init_deassert,
 
-	.smp_callin_clear_local_apic	= smp_callin_clear_local_apic,
+	.smp_callin_clear_local_apic	= NULL,
+
 	.store_NMI_vector		= store_NMI_vector,
 	.restore_NMI_vector		= restore_NMI_vector,
 	.inquire_remote_apic		= inquire_remote_apic,