Merge branch 'x86-nuke386-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull "Nuke 386-DX/SX support" from Ingo Molnar:
 "This tree removes ancient-386-CPUs support and thus zaps quite a bit
  of complexity:

    24 files changed, 56 insertions(+), 425 deletions(-)

  ... which complexity has plagued us with extra work whenever we wanted
  to change SMP primitives, for years.

  Unfortunately there's a nostalgic cost: your old original 386 DX33
  system from early 1991 won't be able to boot modern Linux kernels
  anymore.  Sniff."

I'm not sentimental.  Good riddance.

* 'x86-nuke386-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86, 386 removal: Document Nx586 as a 386 and thus unsupported
  x86, cleanups: Simplify sync_core() in the case of no CPUID
  x86, 386 removal: Remove CONFIG_X86_POPAD_OK
  x86, 386 removal: Remove CONFIG_X86_WP_WORKS_OK
  x86, 386 removal: Remove CONFIG_INVLPG
  x86, 386 removal: Remove CONFIG_BSWAP
  x86, 386 removal: Remove CONFIG_XADD
  x86, 386 removal: Remove CONFIG_CMPXCHG
  x86, 386 removal: Remove CONFIG_M386 from Kconfig

24 files changed, 56 insertions, 425 deletions

diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 2d643255c40d..037c4e30c271 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -69,8 +69,8 @@ config X86
         select HAVE_PERF_USER_STACK_DUMP
         select HAVE_DEBUG_KMEMLEAK
         select ANON_INODES
-        select HAVE_ALIGNED_STRUCT_PAGE if SLUB && !M386
-        select HAVE_CMPXCHG_LOCAL if !M386
+        select HAVE_ALIGNED_STRUCT_PAGE if SLUB
+        select HAVE_CMPXCHG_LOCAL
         select HAVE_CMPXCHG_DOUBLE
         select HAVE_ARCH_KMEMCHECK
         select HAVE_USER_RETURN_NOTIFIER
@@ -171,13 +171,8 @@ config ARCH_MAY_HAVE_PC_FDC
         def_bool y
         depends on ISA_DMA_API
 
-config RWSEM_GENERIC_SPINLOCK
-        def_bool y
-        depends on !X86_XADD
-
 config RWSEM_XCHGADD_ALGORITHM
         def_bool y
-        depends on X86_XADD
 
 config GENERIC_CALIBRATE_DELAY
         def_bool y
@@ -1100,7 +1095,7 @@ config HIGHMEM4G
 
 config HIGHMEM64G
         bool "64GB"
-        depends on !M386 && !M486
+        depends on !M486
         select X86_PAE
         ---help---
           Select this if you have a 32-bit processor and more than 4
diff --git a/arch/x86/Kconfig.cpu b/arch/x86/Kconfig.cpu
index f3b86d0df44e..c026cca5602c 100644
--- a/arch/x86/Kconfig.cpu
+++ b/arch/x86/Kconfig.cpu
@@ -4,23 +4,24 @@ choice
         default M686 if X86_32
         default GENERIC_CPU if X86_64
 
-config M386
-        bool "386"
-        depends on X86_32 && !UML
+config M486
+        bool "486"
+        depends on X86_32
         ---help---
-          This is the processor type of your CPU. This information is used for
-          optimizing purposes. In order to compile a kernel that can run on
-          all x86 CPU types (albeit not optimally fast), you can specify
-          "386" here.
+          This is the processor type of your CPU. This information is
+          used for optimizing purposes. In order to compile a kernel
+          that can run on all supported x86 CPU types (albeit not
+          optimally fast), you can specify "486" here.
+
+          Note that the 386 is no longer supported, this includes
+          AMD/Cyrix/Intel 386DX/DXL/SL/SLC/SX, Cyrix/TI 486DLC/DLC2,
+          UMC 486SX-S and the NexGen Nx586.
 
           The kernel will not necessarily run on earlier architectures than
           the one you have chosen, e.g. a Pentium optimized kernel will run on
           a PPro, but not necessarily on a i486.
 
           Here are the settings recommended for greatest speed:
-          - "386" for the AMD/Cyrix/Intel 386DX/DXL/SL/SLC/SX, Cyrix/TI
-          486DLC/DLC2, and UMC 486SX-S.  Only "386" kernels will run on a 386
-          class machine.
           - "486" for the AMD/Cyrix/IBM/Intel 486DX/DX2/DX4 or
           SL/SLC/SLC2/SLC3/SX/SX2 and UMC U5D or U5S.
           - "586" for generic Pentium CPUs lacking the TSC
@@ -43,16 +44,7 @@ config M386
           - "VIA C3-2" for VIA C3-2 "Nehemiah" (model 9 and above).
           - "VIA C7" for VIA C7.
 
-          If you don't know what to do, choose "386".
-
-config M486
-        bool "486"
-        depends on X86_32
-        ---help---
-          Select this for a 486 series processor, either Intel or one of the
-          compatible processors from AMD, Cyrix, IBM, or Intel.  Includes DX,
-          DX2, and DX4 variants; also SL/SLC/SLC2/SLC3/SX/SX2 and UMC U5D or
-          U5S.
+          If you don't know what to do, choose "486".
 
 config M586
         bool "586/K5/5x86/6x86/6x86MX"
@@ -305,24 +297,16 @@ config X86_INTERNODE_CACHE_SHIFT
         default "12" if X86_VSMP
         default X86_L1_CACHE_SHIFT
 
-config X86_CMPXCHG
-        def_bool y
-        depends on X86_64 || (X86_32 && !M386)
-
 config X86_L1_CACHE_SHIFT
         int
         default "7" if MPENTIUM4 || MPSC
         default "6" if MK7 || MK8 || MPENTIUMM || MCORE2 || MATOM || MVIAC7 || X86_GENERIC || GENERIC_CPU
-        default "4" if MELAN || M486 || M386 || MGEODEGX1
+        default "4" if MELAN || M486 || MGEODEGX1
         default "5" if MWINCHIP3D || MWINCHIPC6 || MCRUSOE || MEFFICEON || MCYRIXIII || MK6 || MPENTIUMIII || MPENTIUMII || M686 || M586MMX || M586TSC || M586 || MVIAC3_2 || MGEODE_LX
 
-config X86_XADD
-        def_bool y
-        depends on !M386
-
 config X86_PPRO_FENCE
         bool "PentiumPro memory ordering errata workaround"
-        depends on M686 || M586MMX || M586TSC || M586 || M486 || M386 || MGEODEGX1
+        depends on M686 || M586MMX || M586TSC || M586 || M486 || MGEODEGX1
         ---help---
           Old PentiumPro multiprocessor systems had errata that could cause
           memory operations to violate the x86 ordering standard in rare cases.
@@ -335,27 +319,11 @@ config X86_PPRO_FENCE
 
 config X86_F00F_BUG
         def_bool y
-        depends on M586MMX || M586TSC || M586 || M486 || M386
+        depends on M586MMX || M586TSC || M586 || M486
 
 config X86_INVD_BUG
         def_bool y
-        depends on M486 || M386
-
-config X86_WP_WORKS_OK
-        def_bool y
-        depends on !M386
-
-config X86_INVLPG
-        def_bool y
-        depends on X86_32 && !M386
+        depends on M486