x86: clean up apic->acpi_madt_oem_check methods

Impact: refactor code

x86 subarchitectures each defined a "acpi_madt_oem_check()" method,
which could be an inline function, or an extern, or a static function,
and which was also the name of a genapic field.

Untangle this namespace spaghetti by setting ->acpi_madt_oem_check()
to NULL on those subarchitectures that have no detection quirks,
and rename the other ones (summit, es7000) that do.

Also change default_acpi_madt_oem_check() to handle NULL entries,
and clean its control flow up as well.

Signed-off-by: Ingo Molnar <mingo@elte.hu>

6 files changed, 21 insertions, 23 deletions

diff --git a/arch/x86/mach-generic/bigsmp.c b/arch/x86/mach-generic/bigsmp.c
index 13e82bc4dae6..22c3608b80dd 100644
--- a/arch/x86/mach-generic/bigsmp.c
+++ b/arch/x86/mach-generic/bigsmp.c
@@ -61,7 +61,7 @@ struct genapic apic_bigsmp = {
 
         .name                           = "bigsmp",
         .probe                          = probe_bigsmp,
-        .acpi_madt_oem_check            = acpi_madt_oem_check,
+        .acpi_madt_oem_check            = NULL,
         .apic_id_registered             = apic_id_registered,
 
         .int_delivery_mode              = INT_DELIVERY_MODE,
diff --git a/arch/x86/mach-generic/default.c b/arch/x86/mach-generic/default.c
index d5fec764fb40..cfec3494a967 100644
--- a/arch/x86/mach-generic/default.c
+++ b/arch/x86/mach-generic/default.c
@@ -28,7 +28,7 @@ struct genapic apic_default = {
 
         .name                           = "default",
         .probe                          = probe_default,
-        .acpi_madt_oem_check            = acpi_madt_oem_check,
+        .acpi_madt_oem_check            = NULL,
         .apic_id_registered             = apic_id_registered,
 
         .int_delivery_mode              = INT_DELIVERY_MODE,
diff --git a/arch/x86/mach-generic/es7000.c b/arch/x86/mach-generic/es7000.c
index 4a404ea5f928..23fe6f1c9691 100644
--- a/arch/x86/mach-generic/es7000.c
+++ b/arch/x86/mach-generic/es7000.c
@@ -57,7 +57,7 @@ mps_oem_check(struct mpc_table *mpc, char *oem, char *productid)
 
 #ifdef CONFIG_ACPI
 /* Hook from generic ACPI tables.c */
-static int __init acpi_madt_oem_check(char *oem_id, char *oem_table_id)
+static int __init es7000_acpi_madt_oem_check(char *oem_id, char *oem_table_id)
 {
         unsigned long oem_addr = 0;
         int check_dsdt;
@@ -81,7 +81,7 @@ static int __init acpi_madt_oem_check(char *oem_id, char *oem_table_id)
         return ret;
 }
 #else
-static int __init acpi_madt_oem_check(char *oem_id, char *oem_table_id)
+static int __init es7000_acpi_madt_oem_check(char *oem_id, char *oem_table_id)
 {
         return 0;
 }
@@ -104,7 +104,7 @@ struct genapic apic_es7000 = {
 
         .name                           = "es7000",
         .probe                          = probe_es7000,
-        .acpi_madt_oem_check            = acpi_madt_oem_check,
+        .acpi_madt_oem_check            = es7000_acpi_madt_oem_check,
         .apic_id_registered             = apic_id_registered,
 
         .int_delivery_mode              = INT_DELIVERY_MODE,
diff --git a/arch/x86/mach-generic/numaq.c b/arch/x86/mach-generic/numaq.c
index fa486ca49c0a..9691b4e1654d 100644
--- a/arch/x86/mach-generic/numaq.c
+++ b/arch/x86/mach-generic/numaq.c
@@ -31,12 +31,6 @@ static int probe_numaq(void)
         return found_numaq;
 }
 
-/* Hook from generic ACPI tables.c */
-static int acpi_madt_oem_check(char *oem_id, char *oem_table_id)
-{
-        return 0;
-}
-
 static void vector_allocation_domain(int cpu, cpumask_t *retmask)
 {
         /* Careful. Some cpus do not strictly honor the set of cpus
@@ -54,7 +48,7 @@ struct genapic apic_numaq = {
 
         .name                           = "NUMAQ",
         .probe                          = probe_numaq,
-        .acpi_madt_oem_check            = acpi_madt_oem_check,
+        .acpi_madt_oem_check            = NULL,
         .apic_id_registered             = apic_id_registered,
 
         .int_delivery_mode              = INT_DELIVERY_MODE,
diff --git a/arch/x86/mach-generic/probe.c b/arch/x86/mach-generic/probe.c
index 82bf0f520fb6..a21e2b1a7011 100644
--- a/arch/x86/mach-generic/probe.c
+++ b/arch/x86/mach-generic/probe.c
@@ -128,20 +128,24 @@ int __init mps_oem_check(struct mpc_table *mpc, char *oem, char *productid)
         return 0;
 }
 
-int __init acpi_madt_oem_check(char *oem_id, char *oem_table_id)
+int __init default_acpi_madt_oem_check(char *oem_id, char *oem_table_id)
 {
         int i;
+
         for (i = 0; apic_probe[i]; ++i) {
-                if (apic_probe[i]->acpi_madt_oem_check(oem_id, oem_table_id)) {
-                        if (!cmdline_apic) {
-                                apic = apic_probe[i];
-                                if (x86_quirks->update_genapic)
-                                        x86_quirks->update_genapic();
-                                printk(KERN_INFO "Switched to APIC driver `%s'.\n",
-                                       apic->name);
-                        }
-                        return 1;
+                if (!apic_probe[i]->acpi_madt_oem_check)
+                        continue;
+                if (!apic_probe[i]->acpi_madt_oem_check(oem_id, oem_table_id))
+                        continue;
+
+                if (!cmdline_apic) {
+                        apic = apic_probe[i];
+                        if (x86_quirks->update_genapic)
+                                x86_quirks->update_genapic();
+                        printk(KERN_INFO "Switched to APIC driver `%s'.\n",
+                               apic->name);
                 }
+                return 1;
         }
         return 0;
 }
diff --git a/arch/x86/mach-generic/summit.c b/arch/x86/mach-generic/summit.c
index 479c1d409779..0eea9fbb2a50 100644
--- a/arch/x86/mach-generic/summit.c
+++ b/arch/x86/mach-generic/summit.c
@@ -41,7 +41,7 @@ struct genapic apic_summit = {
 
         .name                           = "summit",
         .probe                          = probe_summit,
-        .acpi_madt_oem_check            = acpi_madt_oem_check,
+        .acpi_madt_oem_check            = summit_acpi_madt_oem_check,
         .apic_id_registered             = apic_id_registered,
 
         .int_delivery_mode              = INT_DELIVERY_MODE,