sh: Provide common CPU headers, prune the SH-2 and SH-2A directories.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>

1 files changed, 18 insertions, 8 deletions

diff --git a/arch/sh/Makefile b/arch/sh/Makefile
index fb3b65ed2910..fafc01236f6a 100644
--- a/arch/sh/Makefile
+++ b/arch/sh/Makefile
@@ -91,7 +91,6 @@ LDFLAGS_vmlinux		+= --defsym 'jiffies=jiffies_64+4'
 LDFLAGS                 += -EB
 endif
 
-
 head-y                  := arch/sh/kernel/init_task.o
 head-$(CONFIG_SUPERH32) += arch/sh/kernel/head_32.o
 head-$(CONFIG_SUPERH64) += arch/sh/kernel/head_64.o
@@ -134,11 +133,22 @@ endif
 # Companion chips
 core-$(CONFIG_HD6446X_SERIES)   += arch/sh/cchips/hd6446x/
 
-cpuincdir-$(CONFIG_CPU_SH2)     := cpu-sh2
-cpuincdir-$(CONFIG_CPU_SH2A)    := cpu-sh2a
-cpuincdir-$(CONFIG_CPU_SH3)     := cpu-sh3
-cpuincdir-$(CONFIG_CPU_SH4)     := cpu-sh4
-cpuincdir-$(CONFIG_CPU_SH5)     := cpu-sh5
+#
+# CPU header paths
+#
+# These are ordered by optimization level. A CPU family that is a subset
+# of another (ie, SH-2A / SH-2), is picked up first, with increasing
+# levels of genericness if nothing more suitable is situated in the
+# hierarchy.
+#
+# As an example, in order of preference, SH-2A > SH-2 > common definitions.
+#
+cpuincdir-$(CONFIG_CPU_SH2A)    += cpu-sh2a
+cpuincdir-$(CONFIG_CPU_SH2)     += cpu-sh2
+cpuincdir-$(CONFIG_CPU_SH3)     += cpu-sh3
+cpuincdir-$(CONFIG_CPU_SH4)     += cpu-sh4
+cpuincdir-$(CONFIG_CPU_SH5)     += cpu-sh5
+cpuincdir-y                     += cpu-common   # Must be last
 
 libs-$(CONFIG_SUPERH32)         := arch/sh/lib/ $(libs-y)
 libs-$(CONFIG_SUPERH64)         := arch/sh/lib64/ $(libs-y)
@@ -149,8 +159,8 @@ drivers-$(CONFIG_OPROFILE)	+= arch/sh/oprofile/
 
 boot := arch/sh/boot
 
-cflags-y        += -Iarch/sh/include/$(cpuincdir-y)
-cflags-y        += $(foreach d, $(machdir-y), -Iarch/sh/include/$(d))
+cflags-y        += $(foreach d, $(cpuincdir-y), -Iarch/sh/include/$(d)) \
+                   $(foreach d, $(machdir-y), -Iarch/sh/include/$(d))
 
 KBUILD_CFLAGS           += -pipe $(cflags-y)
 KBUILD_CPPFLAGS         += $(cflags-y)