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Replace CONFIG_DCACHE with a Kconfig option more limited in scope - XILINX_MICROBLAZE0_USE_WDC. It should be enabled if the processor supports the "wdc" (Write to Data Cache) instruction. It will be used to guard "wdc" invocations in microblaze cache code. Also, drop all ifdefs around flush_cache() calls and only keep one CONFIG_IS_ENABLED() guard within flush_cache() itself. Signed-off-by: Ovidiu Panait <ovpanait@gmail.com> Link: https://lore.kernel.org/r/20220531181435.3473549-5-ovpanait@gmail.com Signed-off-by: Michal Simek <michal.simek@amd.com>