ARM: v6k: select generic atomic64 code according to V6 variants

If CONFIG_CPU_V6 is enabled, avoid using the double-word exclusive
instructions in the kernel's atomic implementations as these are not
supported.  Fall back to the generic spinlock code instead.

Acked-by: Tony Lindgren <tony@atomide.com>
Acked-by: Will Deacon <will.deacon@arm.com>
Tested-by: Sourav Poddar <sourav.poddar@ti.com>
Tested-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 7a5fe5d131dcd4426ed892bc0d6a8a557be350df..27ec471fb5bbdd7b937c2fd5a634a821b3553550 100644 (file)
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -7,7 +7,7 @@ config ARM
        select HAVE_MEMBLOCK
        select RTC_LIB
        select SYS_SUPPORTS_APM_EMULATION
-       select GENERIC_ATOMIC64 if (!CPU_32v6K || !AEABI)
+       select GENERIC_ATOMIC64 if (CPU_V6 || !CPU_32v6K || !AEABI)
        select HAVE_OPROFILE if (HAVE_PERF_EVENTS)
        select HAVE_ARCH_KGDB
        select HAVE_KPROBES if (!XIP_KERNEL && !THUMB2_KERNEL)