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gcc 4.1 doesn't seem to like const variables as inline assembly outputs. Drop support for reading 64-bit values using get_user() so that we can use an unsigned long to hold the result regardless of the actual size. This should be safe since many architectures, including i386, doesn't support reading 64-bit values with get_user(). Signed-off-by: Haavard Skinnemoen <[email protected]>