Subject: Three if-clauses of constant logic value; char drivers for kernel
	2.4.33.3
From: Mats Erik Andersson <mats.andersson64@comhem.se>
To: linux-kernel@vger.kernel.org
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Date: Tue, 19 Dec 2006 21:59:37 +0100
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Hi there, all masters of kernel code,

I just discovered that the kernel code for 2.4.33.3 contains three
if-statements that never can change their values, whence they should
be repaired or eliminated. In source directory linux/drivers/char the
files vt.c and keyboard.c produce these warning upon compilation:

    vt.c:166: varning: comparison is always false due to limited range  
              of data type
    vt.c:289: varning: comparison is always false due to limited range
              of data type
    keyboard.c:640: varning: comparison is always true due to limited
                    range of data type

I did the compilation with gcc 3.3.5 on Debian Sarge. This behaviour
appeared first for kernel 2.2.19, since I wanted to revive the old
minirtl edition, but to my surprise the same warnings appear also
with the brand new kernel 2.4.33.3.

Best regards
             Mats Erik Andersson, PhD
             ynglingatal@yahoo.se
             mats.andersson64@comhem.se

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