From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from charlotte.tuxdriver.com ([70.61.120.58]:48724 "EHLO smtp.tuxdriver.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1760464Ab0JGNPH (ORCPT ); Thu, 7 Oct 2010 09:15:07 -0400 Date: Thu, 7 Oct 2010 09:06:51 -0400 From: "John W. Linville" To: Stanislaw Gruszka Cc: linux-wireless@vger.kernel.org, johannes@sipsolutions.net Subject: Re: [PATCH] mac80211: avoid uninitialized var warning in ieee80211_scan_cancel Message-ID: <20101007130651.GA13496@tuxdriver.com> References: <1286397743-21687-1-git-send-email-linville@tuxdriver.com> <20101007061515.GA25616@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 In-Reply-To: <20101007061515.GA25616@redhat.com> Sender: linux-wireless-owner@vger.kernel.org List-ID: On Thu, Oct 07, 2010 at 08:15:16AM +0200, Stanislaw Gruszka wrote: > On Wed, Oct 06, 2010 at 04:42:23PM -0400, John W. Linville wrote: > > net/mac80211/scan.c: In function ‘ieee80211_scan_cancel’: > > net/mac80211/scan.c:794: warning: ‘finish’ may be used uninitialized in this function > > > > Signed-off-by: John W. Linville > > Hi John > > What compiler are you using? I have no warning with gcc 4.4.4 from RHEL6. > That's correct, as "finish" variable can not be uninitialized, because is used > only when abortscan == true; [linville-8530p.local]:> gcc -v Using built-in specs. Target: x86_64-redhat-linux Configured with: ../configure --prefix=/usr --mandir=/usr/share/man --infodir=/usr/share/info --with-bugurl=http://bugzilla.redhat.com/bugzilla --enable-bootstrap --enable-shared --enable-threads=posix --enable-checking=release --with-system-zlib --enable-__cxa_atexit --disable-libunwind-exceptions --enable-gnu-unique-object --enable-languages=c,c++,objc,obj-c++,java,fortran,ada --enable-java-awt=gtk --disable-dssi --with-java-home=/usr/lib/jvm/java-1.5.0-gcj-1.5.0.0/jre --enable-libgcj-multifile --enable-java-maintainer-mode --with-ecj-jar=/usr/share/java/eclipse-ecj.jar --disable-libjava-multilib --with-ppl --with-cloog --with-tune=generic --with-arch_32=i686 --build=x86_64-redhat-linux Thread model: posix gcc version 4.4.4 20100630 (Red Hat 4.4.4-10) (GCC) /home/linville [linville-8530p.local]:> cat /etc/redhat-release Fedora release 13 (Goddard) > > + bool finish = false; > > > > /* > > * We are only canceling software scan, or deferred scan that was not > > @@ -818,7 +819,7 @@ void ieee80211_scan_cancel(struct ieee80211_local *local) > > if (abortscan) { > > /* The scan is canceled, but stop work from being pending */ > > cancel_delayed_work_sync(&local->scan_work); > > - if (finish) > > - __ieee80211_scan_completed_finish(&local->hw, false); > > } > > + if (finish) > > + __ieee80211_scan_completed_finish(&local->hw, false); > > } > > I have nothing against the patch, but this seems to be compiler problem, > not our code. I'd rather just avoid the warning spam. :-) -- John W. Linville Someday the world will need a hero, and you linville@tuxdriver.com might be all we have. Be ready.