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-rw-r--r--arch/arm/mm/Kconfig18
1 files changed, 0 insertions, 18 deletions
diff --git a/arch/arm/mm/Kconfig b/arch/arm/mm/Kconfig
index c164cde502..2b6f50dd54 100644
--- a/arch/arm/mm/Kconfig
+++ b/arch/arm/mm/Kconfig
@@ -937,24 +937,6 @@ config VDSO
You must have glibc 2.22 or later for programs to seamlessly
take advantage of this.
-config DMA_CACHE_RWFO
- bool "Enable read/write for ownership DMA cache maintenance"
- depends on CPU_V6K && SMP
- default y
- help
- The Snoop Control Unit on ARM11MPCore does not detect the
- cache maintenance operations and the dma_{map,unmap}_area()
- functions may leave stale cache entries on other CPUs. By
- enabling this option, Read or Write For Ownership in the ARMv6
- DMA cache maintenance functions is performed. These LDR/STR
- instructions change the cache line state to shared or modified
- so that the cache operation has the desired effect.
-
- Note that the workaround is only valid on processors that do
- not perform speculative loads into the D-cache. For such
- processors, if cache maintenance operations are not broadcast
- in hardware, other workarounds are needed (e.g. cache
- maintenance broadcasting in software via FIQ).
config OUTER_CACHE
bool