x86, apic: Remove support for IBM Summit/EXA chipset

There should no longer be any IBM x440 systems or those using the
Summit/EXA chipset out in the wild, so remove support for it.

We've done our due diligence in reaching out to any contact information
listed for this chipset and no indication was given that it should be
kept around.

Signed-off-by: David Rientjes <rientjes@google.com>

Author: rientjes

arch/x86/Kconfig

@@ -350,7 +350,6 @@ config X86_EXTENDED_PLATFORM
 		RDC R-321x SoC
 		SGI 320/540 (Visual Workstation)
 		STA2X11-based (e.g. Northville)
-		Summit/EXA (IBM x440)
 		Moorestown MID devices
 
 	  If you have one of these systems, or if you want to build a
@@ -488,10 +487,10 @@ config X86_32_NON_STANDARD
 	depends on X86_32 && SMP
 	depends on X86_EXTENDED_PLATFORM
 	---help---
-	  This option compiles in the NUMAQ, Summit, bigsmp,
-	  STA2X11, default subarchitectures.  It is intended for a generic
-	  binary kernel. If you select them all, kernel will probe it
-	  one by one and will fallback to default.
+	  This option compiles in the NUMAQ, bigsmp, and STA2X11 default
+	  subarchitectures.  It is intended for a generic binary kernel. If you
+	  select them all, kernel will probe it one by one and will fallback to
+	  default.
 
 # Alphabetically sorted list of Non standard 32 bit platforms
 
@@ -547,13 +546,6 @@ config STA2X11
 	  option is selected the kernel will still be able to boot on
 	  standard PC machines.
 
-config X86_SUMMIT
-	bool "Summit/EXA (IBM x440)"
-	depends on X86_32_NON_STANDARD
-	---help---
-	  This option is needed for IBM systems that use the Summit/EXA chipset.
-	  In particular, it is needed for the x440.
-
 config X86_32_IRIS
 	tristate "Eurobraille/Iris poweroff module"
 	depends on X86_32
@@ -676,14 +668,6 @@ config MEMTEST
 	        memtest=4, mean do 4 test patterns.
 	  If you are unsure how to answer this question, answer N.
 
-config X86_SUMMIT_NUMA
-	def_bool y
-	depends on X86_32 && NUMA && X86_32_NON_STANDARD
-
-config X86_CYCLONE_TIMER
-	def_bool y
-	depends on X86_SUMMIT
-
 source "arch/x86/Kconfig.cpu"
 
 config HPET_TIMER
@@ -812,7 +796,7 @@ config NR_CPUS
 	range 2 8192 if SMP && !MAXSMP && CPUMASK_OFFSTACK && X86_64
 	default "1" if !SMP
 	default "8192" if MAXSMP
-	default "32" if SMP && (X86_NUMAQ || X86_SUMMIT || X86_BIGSMP)
+	default "32" if SMP && (X86_NUMAQ || X86_BIGSMP)
 	default "8" if SMP
 	---help---
 	  This allows you to specify the maximum number of CPUs which this
@@ -1232,8 +1216,8 @@ config DIRECT_GBPAGES
 config NUMA
 	bool "Numa Memory Allocation and Scheduler Support"
 	depends on SMP
-	depends on X86_64 || (X86_32 && HIGHMEM64G && (X86_NUMAQ || X86_BIGSMP || X86_SUMMIT && ACPI))
-	default y if (X86_NUMAQ || X86_SUMMIT || X86_BIGSMP)
+	depends on X86_64 || (X86_32 && HIGHMEM64G && (X86_NUMAQ || X86_BIGSMP))
+	default y if (X86_NUMAQ || X86_BIGSMP)
 	---help---
 	  Enable NUMA (Non Uniform Memory Access) support.
 
@@ -1245,14 +1229,11 @@ config NUMA
 	  (or later), AMD Opteron, or EM64T NUMA.
 
 	  For 32-bit this is only needed on (rare) 32-bit-only platforms
-	  that support NUMA topologies, such as NUMAQ / Summit, or if you
-	  boot a 32-bit kernel on a 64-bit NUMA platform.
+	  that support NUMA topologies, such as NUMAQ, or if you boot a 32-bit
+	  kernel on a 64-bit NUMA platform.
 
 	  Otherwise, you should say N.
 
-comment "NUMA (Summit) requires SMP, 64GB highmem support, ACPI"
-	depends on X86_32 && X86_SUMMIT && (!HIGHMEM64G || !ACPI)
-
 config AMD_NUMA
 	def_bool y
 	prompt "Old style AMD Opteron NUMA detection"

arch/x86/kernel/apic/Makefile

@@ -19,7 +19,6 @@ endif
 
 # APIC probe will depend on the listing order here
 obj-$(CONFIG_X86_NUMAQ)		+= numaq_32.o
-obj-$(CONFIG_X86_SUMMIT)	+= summit_32.o
 obj-$(CONFIG_X86_BIGSMP)	+= bigsmp_32.o
 
 # For 32bit, probe_32 need to be listed last