[ARM] 3761/1: fix armv4t breakage after adding thumb interworking to userspace helpers

Patch from Lennert Buytenhek

On armv4t systems, we have always compiled the kernel with -march=armv4
instead of -march=armv4t, which means that any use of bx will bomb out.

Commit ba9b5d76372dc290b6ca04dad93927a22c2ac49a introduced the use of
bx in the kernel, which means we need to compile with -march=armv4t on
armv4t systems now.

Signed-off-by: Lennert Buytenhek <buytenh@wantstofly.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

2 files changed, 11 insertions, 5 deletions

diff --git a/arch/arm/Makefile b/arch/arm/Makefile
index 3345c6d0fd1e..92873cdee31f 100644
--- a/arch/arm/Makefile
+++ b/arch/arm/Makefile
@@ -47,7 +47,8 @@ comma = ,
 # testing for a specific architecture or later rather impossible.
 arch-$(CONFIG_CPU_32v6)         :=-D__LINUX_ARM_ARCH__=6 $(call cc-option,-march=armv6,-march=armv5t -Wa$(comma)-march=armv6)
 arch-$(CONFIG_CPU_32v6K)        :=-D__LINUX_ARM_ARCH__=6 $(call cc-option,-march=armv6k,-march=armv5t -Wa$(comma)-march=armv6k)
-arch-$(CONFIG_CPU_32v5)         :=-D__LINUX_ARM_ARCH__=5 $(call cc-option,-march=armv5te,-march=armv4)
+arch-$(CONFIG_CPU_32v5)         :=-D__LINUX_ARM_ARCH__=5 $(call cc-option,-march=armv5te,-march=armv4t)
+arch-$(CONFIG_CPU_32v4T)        :=-D__LINUX_ARM_ARCH__=4 -march=armv4t
 arch-$(CONFIG_CPU_32v4)         :=-D__LINUX_ARM_ARCH__=4 -march=armv4
 arch-$(CONFIG_CPU_32v3)         :=-D__LINUX_ARM_ARCH__=3 -march=armv3
 
diff --git a/arch/arm/mm/Kconfig b/arch/arm/mm/Kconfig
index 5f80f184cd32..b4f220dd5eb8 100644
--- a/arch/arm/mm/Kconfig
+++ b/arch/arm/mm/Kconfig
@@ -46,7 +46,7 @@ config CPU_ARM710
 config CPU_ARM720T
         bool "Support ARM720T processor" if !ARCH_CLPS711X && !ARCH_L7200 && !ARCH_CDB89712 && ARCH_INTEGRATOR
         default y if ARCH_CLPS711X || ARCH_L7200 || ARCH_CDB89712 || ARCH_H720X
-        select CPU_32v4
+        select CPU_32v4T
         select CPU_ABRT_LV4T
         select CPU_CACHE_V4
         select CPU_CACHE_VIVT
@@ -64,7 +64,7 @@ config CPU_ARM920T
         bool "Support ARM920T processor"
         depends on ARCH_EP93XX || ARCH_INTEGRATOR || CPU_S3C2410 || CPU_S3C2440 || CPU_S3C2442 || ARCH_IMX || ARCH_AAEC2000 || ARCH_AT91RM9200
         default y if CPU_S3C2410 || CPU_S3C2440 || CPU_S3C2442 || ARCH_AT91RM9200
-        select CPU_32v4
+        select CPU_32v4T
         select CPU_ABRT_EV4T
         select CPU_CACHE_V4WT
         select CPU_CACHE_VIVT
@@ -85,7 +85,7 @@ config CPU_ARM922T
         bool "Support ARM922T processor" if ARCH_INTEGRATOR
         depends on ARCH_LH7A40X || ARCH_INTEGRATOR
         default y if ARCH_LH7A40X
-        select CPU_32v4
+        select CPU_32v4T
         select CPU_ABRT_EV4T
         select CPU_CACHE_V4WT
         select CPU_CACHE_VIVT
@@ -104,7 +104,7 @@ config CPU_ARM925T
         bool "Support ARM925T processor" if ARCH_OMAP1
         depends on ARCH_OMAP15XX
         default y if ARCH_OMAP15XX
-        select CPU_32v4
+        select CPU_32v4T
         select CPU_ABRT_EV4T
         select CPU_CACHE_V4WT
         select CPU_CACHE_VIVT
@@ -285,6 +285,11 @@ config CPU_32v4
         select TLS_REG_EMUL if SMP || !MMU
         select NEEDS_SYSCALL_FOR_CMPXCHG if SMP
 
+config CPU_32v4T
+        bool
+        select TLS_REG_EMUL if SMP || !MMU
+        select NEEDS_SYSCALL_FOR_CMPXCHG if SMP
+
 config CPU_32v5
         bool
         select TLS_REG_EMUL if SMP || !MMU