netdev - Re: [PATCH] net/packet: remove dead code and unneeded variable from prb_setup_retire_blk

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Message-ID: <CAAsGZS7sPYqXi+KxjD9omzvDME6A3SFGv+kMadMhJk6qNtSsBw@mail.gmail.com>
Date:	Mon, 14 Nov 2011 10:54:01 -0500
From:	chetan loke <loke.chetan@...il.com>
To:	Jesper Juhl <jj@...osbits.net>
Cc:	netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <eric.dumazet@...il.com>,
	Changli Gao <xiaosuo@...il.com>,
	Ben Greear <greearb@...delatech.com>,
	waltje@...lt.nl.mugnet.org, gw4pts@...pts.ampr.org,
	waltje@...ux.com, ross.biro@...il.com, alan@...ux.intel.com
Subject: Re: [PATCH] net/packet: remove dead code and unneeded variable from prb_setup_retire_blk_timer()

On Sun, Nov 13, 2011 at 4:55 PM, Jesper Juhl <jj@...osbits.net> wrote:
> We test for 'tx_ring' being != zero and BUG() if that's the case. So after
> that check there is no way that 'tx_ring' could be anything _but_ zero, so
> testing it again is just dead code. Once that dead code is removed, the
> 'pkc' local variable becomes entirely redundant, so remove that as well.

It was there so that it would be a no-brainer thing for the next
person who would want to enable tx_ring support. And given that this
check was called just once during the initial setup, it didn't seem
like a big deal to me. And the BUG() would let the next-person know
what different paths need to be plugged.


Chetan Loke
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