x86, smp: refactor ->wait_for_init_deassert()

- spread out the namespace on a per APIC driver basis

 - handle a NULL ->wait_for_init_deassert() as a 'dont wait' default method

 - remove NUMAQ and Summit handlers
Signed-off-by: NIngo Molnar <mingo@elte.hu>

arch/x86/include/asm/es7000/wakecpu.h

@@ -4,7 +4,7 @@
 #define ES7000_TRAMPOLINE_PHYS_LOW	0x467
 #define ES7000_TRAMPOLINE_PHYS_HIGH	0x469
 
-static inline void wait_for_init_deassert(atomic_t *deassert)
+static inline void es7000_wait_for_init_deassert(atomic_t *deassert)
 {
 #ifndef CONFIG_ES7000_CLUSTERED_APIC
 	while (!atomic_read(deassert))

arch/x86/include/asm/mach-default/mach_wakecpu.h

 #ifndef _ASM_X86_MACH_DEFAULT_MACH_WAKECPU_H
 #define _ASM_X86_MACH_DEFAULT_MACH_WAKECPU_H
 
-static inline void wait_for_init_deassert(atomic_t *deassert)
+static inline void default_wait_for_init_deassert(atomic_t *deassert)
 {
 	while (!atomic_read(deassert))
 		cpu_relax();

arch/x86/include/asm/mach-generic/mach_wakecpu.h

 #ifndef _ASM_X86_MACH_GENERIC_MACH_WAKECPU_H
 #define _ASM_X86_MACH_GENERIC_MACH_WAKECPU_H
 
-#define wait_for_init_deassert (apic->wait_for_init_deassert)
 #define smp_callin_clear_local_apic (apic->smp_callin_clear_local_apic)
 #define store_NMI_vector (apic->store_NMI_vector)
 #define restore_NMI_vector (apic->restore_NMI_vector)

arch/x86/include/asm/numaq/wakecpu.h

@@ -6,11 +6,6 @@
 #define NUMAQ_TRAMPOLINE_PHYS_LOW (0x8)
 #define NUMAQ_TRAMPOLINE_PHYS_HIGH (0xa)
 
-/* We don't do anything here because we use NMI's to boot instead */
-static inline void wait_for_init_deassert(atomic_t *deassert)
-{
-}
-
 /*
  * Because we use NMIs rather than the INIT-STARTUP sequence to
  * bootstrap the CPUs, the APIC may be in a weird state. Kick it.

arch/x86/kernel/es7000_32.c

@@ -182,10 +182,6 @@ static int wakeup_secondary_cpu_via_mip(int cpu, unsigned long eip)
 	return 0;
 }
 
-static void noop_wait_for_deassert(atomic_t *deassert_not_used)
-{
-}
-
 static int __init es7000_update_genapic(void)
 {
 	apic->wakeup_cpu = wakeup_secondary_cpu_via_mip;
@@ -194,7 +190,7 @@ static int __init es7000_update_genapic(void)
 	if (boot_cpu_data.x86 == 6 &&
 	    (boot_cpu_data.x86_model >= 7 || boot_cpu_data.x86_model <= 11)) {
 		es7000_update_genapic_to_cluster();
-		apic->wait_for_init_deassert = noop_wait_for_deassert;
+		apic->wait_for_init_deassert = NULL;
 		apic->wakeup_cpu = wakeup_secondary_cpu_via_mip;
 	}
 

arch/x86/kernel/smpboot.c

@@ -196,7 +196,8 @@ static void __cpuinit smp_callin(void)
 	 * our local APIC.  We have to wait for the IPI or we'll
 	 * lock up on an APIC access.
 	 */
-	wait_for_init_deassert(&init_deasserted);
+	if (apic->wait_for_init_deassert)
+		apic->wait_for_init_deassert(&init_deasserted);
 
 	/*
 	 * (This works even if the APIC is not enabled.)

arch/x86/mach-generic/bigsmp.c

@@ -106,7 +106,9 @@ struct genapic apic_bigsmp = {
 	.wakeup_cpu			= NULL,
 	.trampoline_phys_low		= DEFAULT_TRAMPOLINE_PHYS_LOW,
 	.trampoline_phys_high		= DEFAULT_TRAMPOLINE_PHYS_HIGH,
-	.wait_for_init_deassert		= wait_for_init_deassert,
+
+	.wait_for_init_deassert		= default_wait_for_init_deassert,
+
 	.smp_callin_clear_local_apic	= smp_callin_clear_local_apic,
 	.store_NMI_vector		= store_NMI_vector,
 	.restore_NMI_vector		= restore_NMI_vector,

arch/x86/mach-generic/default.c

@@ -87,7 +87,9 @@ struct genapic apic_default = {
 	.wakeup_cpu			= NULL,
 	.trampoline_phys_low		= DEFAULT_TRAMPOLINE_PHYS_LOW,
 	.trampoline_phys_high		= DEFAULT_TRAMPOLINE_PHYS_HIGH,
-	.wait_for_init_deassert		= wait_for_init_deassert,
+
+	.wait_for_init_deassert		= default_wait_for_init_deassert,
+
 	.smp_callin_clear_local_apic	= smp_callin_clear_local_apic,
 	.store_NMI_vector		= store_NMI_vector,
 	.restore_NMI_vector		= restore_NMI_vector,

arch/x86/mach-generic/es7000.c

@@ -142,7 +142,9 @@ struct genapic apic_es7000 = {
 	.wakeup_cpu			= NULL,
 	.trampoline_phys_low		= DEFAULT_TRAMPOLINE_PHYS_LOW,
 	.trampoline_phys_high		= DEFAULT_TRAMPOLINE_PHYS_HIGH,
-	.wait_for_init_deassert		= wait_for_init_deassert,
+
+	.wait_for_init_deassert		= default_wait_for_init_deassert,
+
 	.smp_callin_clear_local_apic	= smp_callin_clear_local_apic,
 	.store_NMI_vector		= store_NMI_vector,
 	.restore_NMI_vector		= restore_NMI_vector,

arch/x86/mach-generic/numaq.c

@@ -106,7 +106,10 @@ struct genapic apic_numaq = {
 	.wakeup_cpu			= NULL,
 	.trampoline_phys_low		= NUMAQ_TRAMPOLINE_PHYS_LOW,
 	.trampoline_phys_high		= NUMAQ_TRAMPOLINE_PHYS_HIGH,
-	.wait_for_init_deassert		= wait_for_init_deassert,
+
+	/* 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,
 	.store_NMI_vector		= store_NMI_vector,
 	.restore_NMI_vector		= restore_NMI_vector,

arch/x86/mach-generic/summit.c

@@ -86,7 +86,9 @@ struct genapic apic_summit = {
 	.wakeup_cpu			= NULL,
 	.trampoline_phys_low		= DEFAULT_TRAMPOLINE_PHYS_LOW,
 	.trampoline_phys_high		= DEFAULT_TRAMPOLINE_PHYS_HIGH,
-	.wait_for_init_deassert		= wait_for_init_deassert,
+
+	.wait_for_init_deassert		= default_wait_for_init_deassert,
+
 	.smp_callin_clear_local_apic	= smp_callin_clear_local_apic,
 	.store_NMI_vector		= store_NMI_vector,
 	.restore_NMI_vector		= restore_NMI_vector,