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Date: Sun, 1 Mar 2009 20:41:38 -0300
Message-ID: <82ecf08e0903011541y32f74656uc33dc08a2c2a5fa0@mail.gmail.com>
Subject: Re: lp: too large subtraction on unsigned?
From: Thiago Galesi <thiagogalesi@gmail.com>
To: Roel Kluin <roel.kluin@gmail.com>
Cc: lkml <linux-kernel@vger.kernel.org>
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Doesn't look like something is wrong, or I'm missing something...
:
> do {
> ? ? ? ?if (canwrite > 0) {
> ? ? ? ? ? ? ? ?...
> ? ? ? ? ? ? ? ?count -= written;
> ? ? ? ?}

If there are chars left you write to the PP and take it out of the total

> ? ? ? ?if (lf && canwrite <= 0) {
> ? ? ? ? ? ? ? ?...
> ? ? ? ? ? ? ? ?count--;
> ? ? ? ? ? ? ? ?...
> ? ? ? ?}
> } while (count > 0 && (CONSOLE_LP_STRICT || written > 0));

The second if is for translating \n to \r\n only if you've already
written everything (up to /n) to the PP

If count > 0 fails (that is, count == 0) you get out of the loop

-- 
-
Thiago Galesi
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