linux-kernel - Re: [PATCH 1/8] fs/9p: Deletion of unnecessary checks before the function call "p9_client

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Date:	Mon, 5 Jan 2015 23:01:55 +0100 (CET)
From:	Julia Lawall <julia.lawall@...6.fr>
To:	SF Markus Elfring <elfring@...rs.sourceforge.net>
cc:	Julia Lawall <julia.lawall@...6.fr>,
	Dan Carpenter <dan.carpenter@...cle.com>,
	Eric Van Hensbergen <ericvh@...il.com>,
	Latchesar Ionkov <lucho@...kov.net>,
	Ron Minnich <rminnich@...dia.gov>,
	v9fs-developer@...ts.sourceforge.net,
	LKML <linux-kernel@...r.kernel.org>,
	kernel-janitors@...r.kernel.org
Subject: Re: [PATCH 1/8] fs/9p: Deletion of unnecessary checks before the
 function call "p9_client_clunk"

> The error response is clear. Are any software developments efforts expected
> to clean-up the call stack for unwanted null pointers even more?

I found the original patch and looked at the call sites.  None of them 
calls dump_stack.  The behavior is thus not the same.  With your change, 
something that was previously treated in an orderly manner will be 
converted to something that looks like an oops.  I assume that the cost of 
the dump_stack will also be huge.

julia
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