sparc: prepare kernel/ for unification

o sparc32 files with identical names to sparc64 renamed to <name>_32.S
o introduced a few Kconfig helpers to simplify Makefile logic
o refactored Makefile to prepare for unification
  - use obj-$(CONFIG_SPARC32) for sparc32 specific files
  - use <name>_$(BITS) for files where sparc64 has a _64 variant
  - sparc64 directly include a few files where sparc32 builds them,
    refer to these files directly (no BITS)
  - sneaked in -Werror as used by sparc64
o modified sparc/Makefile to use the new names for head/init_task

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 21 insertions, 0 deletions

diff --git a/arch/sparc/Kconfig b/arch/sparc/Kconfig
index 26ddeedb5166..7cfe557db23d 100644
--- a/arch/sparc/Kconfig
+++ b/arch/sparc/Kconfig
@@ -198,6 +198,17 @@ config EMULATED_CMPXCHG
           Sparc32 does not have a CAS instruction like sparc64. cmpxchg()
           is emulated, and therefore it is not completely atomic.
 
+# Makefile helpers
+config SPARC32_SMP
+        bool
+        default y
+        depends on SPARC32 && SMP
+
+config SPARC64_SMP
+        bool
+        default y
+        depends on SPARC64 && SMP
+
 choice
         prompt "Kernel page size" if SPARC64
         default SPARC64_PAGE_SIZE_8KB
@@ -505,6 +516,16 @@ config SUN_OPENPROMFS
           Only choose N if you know in advance that you will not need to modify
           OpenPROM settings on the running system.
 
+# Makefile helpers
+config SPARC32_PCI
+        bool
+        default y
+        depends on SPARC32 && PCI
+
+config SPARC64_PCI
+        bool
+        default y
+        depends on SPARC64 && PCI
 
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