Three if-clauses of constant logic value; char drivers for kernel2.4.33.3

From: Mats Erik Andersson
Date: Tue Dec 19 2006 - 16:22:14 EST


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@xxxxxxxx
mats.andersson64@xxxxxxxxx

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/