netdev - Re: [PATCH net-next] net: FIB tracepoints

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Message-Id: <20150827.221753.1685094662698420131.davem@davemloft.net>
Date:	Thu, 27 Aug 2015 22:17:53 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	dsa@...ulusnetworks.com
Cc:	netdev@...r.kernel.org
Subject: Re: [PATCH net-next] net: FIB tracepoints

From: David Ahern <dsa@...ulusnetworks.com>
Date: Thu, 27 Aug 2015 22:12:01 -0700

> perhaps an example helps:
> 
> swapper 0 [000] 406.447548: fib:fib_table_lookup: table 255 oif 0 iif
> 0 src 0.0.0.0 dst 2.1.1.2 tos 0 scope 0 flags 0
> 
> If src and dst are u32's then they print as either 0x%x or %d which is
> not intuitive. I added support to perf for the following printk
> formats with 3d199b5be53:
 ...

The following had better work:

	__u32 addr;
	printk("%pI4\n", &addr);

We do it everywhere in the networking code.

I don't know why you think it is required to use an array.
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