linux-next: omap2plus_defconfig not building

Catalin Marinas catalin.marinas at
Tue Oct 19 07:37:35 EDT 2010

On Tue, 2010-10-19 at 11:18 +0100, Anand Gadiyar wrote:
> Commit ba1b9be5cd in linux-next (ARM: Add SWP/SWPB emulation for ARMv7
> processors (v5)) introduced arch/arm/kernel/swp_emulate.c. This file
> gets compiled when the omap2plus_defconfig is built - the
> omap2plus_defconfig builds OMAP2420, OMAP2430, OMAP3 and OMAP4 in one
> image, and has CPU_V6 and CPU_V7 both enabled.

This patch should fix it:

ARM: Do not enable SWP emulation if CPU_V6 && CPU_V7

From: Catalin Marinas <catalin.marinas at>

This option uses LDREXB/STREXB to emulate SWPB but these instructions
are not supported on all the ARMv6 processors.

Reported-by: Anand Gadiyar <gadiyar at>
Signed-off-by: Catalin Marinas <catalin.marinas at>
Cc: Leif Lindholm <Leif.Lindholm at>
 arch/arm/mm/Kconfig |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/arch/arm/mm/Kconfig b/arch/arm/mm/Kconfig
index 8493ed0..5195d61 100644
--- a/arch/arm/mm/Kconfig
+++ b/arch/arm/mm/Kconfig
@@ -638,7 +638,7 @@ config ARM_THUMBEE
 	bool "Emulate SWP/SWPB instructions"
-	depends on CPU_V7
+	depends on CPU_V7 && !CPU_V6
 	default y if SMP

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