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Since driver data is a pointer, direct casting to integer causes warning when compile testing for 64-bit architecture: drivers/mmc/host/s3cmci.c:1495:17: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast] The actual driver data can be only 0 or 1, so cast it via long and do not care about any loss of value. Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org> Link: https://lore.kernel.org/r/20200902204847.2764-3-krzk@kernel.org Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>