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e3aa745ff9
Use the ktime_us_delta() helper to measure the driver probe time. Given the helpers already returns an s64 value, let's drop the unnecessary casting to s64 as well. There is no functional change. Signed-off-by: Zenghui Yu <yuzenghui@huawei.com> Link: https://lore.kernel.org/r/20200803033343.1178-1-yuzenghui@huawei.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>