netdev - Re: [PATCH net-next] mac80211: silent build warnings

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Message-ID: <1420702907.2029.2.camel@sipsolutions.net>
Date:	Thu, 08 Jan 2015 08:41:47 +0100
From:	Johannes Berg <johannes@...solutions.net>
To:	Ying Xue <ying.xue@...driver.com>
Cc:	netdev@...r.kernel.org, linux-wireless@...r.kernel.org
Subject: Re: [PATCH net-next] mac80211: silent build warnings

On Thu, 2015-01-08 at 15:04 +0800, Ying Xue wrote:
> Silent the following build warnings:
> 
> net/mac80211/mlme.c: In function ‘ieee80211_rx_mgmt_beacon’:
> net/mac80211/mlme.c:1348:3: warning: ‘pwr_level_cisco’ may be used uninitialized in this function [-Wuninitialized]
> net/mac80211/mlme.c:1315:6: note: ‘pwr_level_cisco’ was declared here

We seem to get this every year or so... just upgrade your compiler and
it will be smart enough to prove that it's wrong here.

I really *don't* want to shut up the compiler forcefully since it will
cause modern compilers to *not* warn if it actually *is* unused - and 0
is not a useful value - this code is tricky enough and we want compiler
help in case we need to modify it in the future.

johannes

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