In a multiplatform kernel, one can enable mach-mvebu together with one or more ARMv6 platforms, which leads to all files being built for v6. The coherency_ll.S uses the "dsb" instruction that is only available for v7, causing a build error in this case. Since the file is only used on v7 based machines, it is safe to build it using an ".arch armv7-a" statement.
Without this patch, building allyesconfig results in: arch/arm/mach-mvebu/coherency_ll.S: Assembler messages: arch/arm/mach-mvebu/coherency_ll.S:45: Error: selected processor does not support ARM mode `dsb' Signed-off-by: Arnd Bergmann <[email protected]> Cc: Jason Cooper <[email protected]> Cc: Andrew Lunn <[email protected]> Cc: Gregory Clement <[email protected]> --- arch/arm/mach-mvebu/coherency_ll.S | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/arm/mach-mvebu/coherency_ll.S b/arch/arm/mach-mvebu/coherency_ll.S index 53e8391..7648bda 100644 --- a/arch/arm/mach-mvebu/coherency_ll.S +++ b/arch/arm/mach-mvebu/coherency_ll.S @@ -25,6 +25,7 @@ * r0: Coherency fabric base register address * r1: HW CPU id */ + .arch armv7-a ENTRY(ll_set_cpu_coherent) /* Create bit by cpu index */ mov r3, #(1 << 24) -- 1.7.10.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
