linux-kernel - Kernel module compiler warnings

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Message-Id: <1229779614.1668.5.camel@prima.yankeeboysoftware.com>
Date:	Sat, 20 Dec 2008 13:26:54 +0000
From:	Jack <gridley@...keeboysoftware.com>
To:	linux-kernel@...r.kernel.org
Subject: Kernel module compiler warnings

Could someone kindly explain why I see these warnings:

warning: passing argument X of 'SOME_TYPE_HERE' discards qualifiers from
pointer target type.

I know *what* is causing the error - it's a cast removing a const

e.g.  

void foo(const my_type *a)
{
	bar( (my_type*)a );
}

What I don't understand is that it only seems to be emitted when I
compile on my 32 bit machine.  Compiling on my 64bit machine does not
generate this warning

Thank you,
Jack

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