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
If BITREVERSE is m and FPGA_MGR_ALTERA_PS_SPI is y, build fails: drivers/fpga/altera-ps-spi.o: In function `altera_ps_write': altera-ps-spi.c:(.text+0x4ec): undefined reference to `byte_rev_table' Select BITREVERSE to fix this. Reported-by: Hulk Robot <hulkci@huawei.com> Fixes: fcfe18f885f6 ("fpga-manager: altera-ps-spi: use bitrev8x4") Signed-off-by: YueHaibing <yuehaibing@huawei.com> Cc: stable <stable@vger.kernel.org> Acked-by: Moritz Fischer <mdf@kernel.org> Link: https://lore.kernel.org/r/20190708071356.50928-1-yuehaibing@huawei.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>