netdev - [PATCH net-next 0/2] rtnetlink: avoid a warning in rtnl

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Message-Id: <20181128063231.12907-1-jakub.kicinski@netronome.com>
Date:   Tue, 27 Nov 2018 22:32:29 -0800
From:   Jakub Kicinski <jakub.kicinski@...ronome.com>
To:     davem@...emloft.net
Cc:     dsahern@...il.com, jiri@...nulli.us, roopa@...ulusnetworks.com,
        christian.brauner@...ntu.com, netdev@...r.kernel.org,
        oss-drivers@...ronome.com,
        Jakub Kicinski <jakub.kicinski@...ronome.com>
Subject: [PATCH net-next 0/2] rtnetlink: avoid a warning in rtnl_newlink()

Hi!

I've been hoping for some time that someone more competent would fix
the stack frame size warning in rtnl_newlink(), but looks like I'll
have to take a stab at it myself :)  That's the only warning I see
in most of my builds.

First patch refactors away a somewhat surprising if (1) code block.
Reindentation will most likely cause cherry-pick problems but OTOH
rtnl_newlink() doesn't seem to be changed often, so perhaps we can
risk it in the name of cleaner code?

Second patch fixes the warning in simplest possible way.  I was
pondering if there is any more clever solution, but I can't see it..
rtnl_newlink() is quite long with a lot of possible execution paths
so doing memory allocations half way through leads to very ugly
results.

Jakub Kicinski (2):
  rtnetlink: remove a level of indentation in rtnl_newlink()
  rtnetlink: avoid frame size warning in rtnl_newlink()

 net/core/rtnetlink.c | 331 ++++++++++++++++++++++---------------------
 1 file changed, 170 insertions(+), 161 deletions(-)

-- 
2.17.1