[U-Boot] [PATCH] ppc4xx: Add Sequoia RAM-booting target

[Stefan Roese <sr@denx.de>]

Hi Wolfgang,

On Thursday 07 May 2009, Wolfgang Denk wrote:
> > Perhaps it's quite new to the Linux kernel. I just spotted it the first
> > time a few weeks ago and thought: "What a nice way to remove some of the
> > ugly #ifdef's in U-Boot!". :)
>
> My understanding was that  this  is  (only?)  intended  for  function
> declarations  to  silence  warnings  about  unused function arguments
> (which may be necessary anyway for  compatible  call  interface  with
> other functions that actually need this arg).

No. This is not the case. Just take a look at the usage in drivers/net for 
example. You will see this construct is used here exactly to prevent those 
#ifdef's in the variable declaration in many cases:

drivers/net/bnx2.c:

		int hw_vlan __maybe_unused = 0;
...
#ifdef BCM_VLAN
			if (bp->vlgrp)
				hw_vlan = 1;
			else
#endif

But ok, if nobody else other than me prefers this version then I'll change to 
those #ifdef's again.

Best regards,
Stefan

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