ARM: 6859/1: Add writethrough dcache support for ARM926EJS processor
The ARM kernel supports writethrough data cache via the CONFIG_CPU_DCACHE_WRITETHROUGH option. However, that functionality wasn't implemented in the arch/arm/boot/compressed code. It is now necessary due to a new ARM926EJS processor that has an issue with writeback data cache. Signed-off-by: Mark A. Greer <mgreer@mvista.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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