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c75f3939d8
The _IOR anbd _IOW macros cast the sizeof of their third arg uselessly to long. The _IO definitions have been taken from BSD in 1995 and never changed again. The fact that the sizeof() gets cast to long is probably a remnant from the past when the stuff was supposed to be used on 16 bit machines, but the value was supposed to be 32 bit. Given that the values are not supposed to be ever bigger than 32 bit, we drop the (long) cast. Compare with current FreeBSD, which does not cast at all. Signed-off-by: Corinna Vinschen <corinna@vinschen.de>