From mboxrd@z Thu Jan 1 00:00:00 1970 From: Nathan Fontenot Subject: Re: [PATCH v2 07/14] of/reconfig: Always use the same structure for notifiers Date: Tue, 25 Nov 2014 21:11:58 -0600 Message-ID: <547544FE.5020706@linux.vnet.ibm.com> References: <1416868422-22103-1-git-send-email-grant.likely@linaro.org> <1416868422-22103-8-git-send-email-grant.likely@linaro.org> <1416956874.5089.13.camel@kernel.crashing.org> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <1416956874.5089.13.camel@kernel.crashing.org> Sender: linux-kernel-owner@vger.kernel.org To: Benjamin Herrenschmidt , Grant Likely Cc: devicetree@vger.kernel.org, Wolfram Sang , Pantelis Antoniou , linux-kernel@vger.kernel.org, Rob Herring , Mark Brown , linuxppc-dev@lists.ozlabs.org List-Id: devicetree@vger.kernel.org On 11/25/2014 05:07 PM, Benjamin Herrenschmidt wrote: > On Mon, 2014-11-24 at 22:33 +0000, Grant Likely wrote: >> The OF_RECONFIG notifier callback uses a different structure depending >> on whether it is a node change or a property change. This is silly, and >> not very safe. Rework the code to use the same data structure regardless >> of the type of notifier. > > I fell pretty good about this one except... > >> diff --git a/arch/powerpc/mm/numa.c b/arch/powerpc/mm/numa.c >> index b9d1dfdbe5bb..9fe6002c1d5a 100644 >> --- a/arch/powerpc/mm/numa.c >> +++ b/arch/powerpc/mm/numa.c >> @@ -1711,12 +1711,11 @@ static void stage_topology_update(int core_id) >> static int dt_update_callback(struct notifier_block *nb, >> unsigned long action, void *data) >> { >> - struct of_prop_reconfig *update; >> + struct of_reconfig_data *update = data; >> int rc = NOTIFY_DONE; >> >> switch (action) { >> case OF_RECONFIG_UPDATE_PROPERTY: >> - update = (struct of_prop_reconfig *)data; > > Should we assert/bug on !update->dn / update->prop ? > > (Same for the rest of the patch) > > Or do you reckon it's pointless ? > I'm not sure it's worth it, if those are NULL pointers the drivers/of code would have tried to use them before invoking the notifier chain. We won't make it this far if they're NULL. Otherwise the patch looks good to me, Reviewed-by: Nathan Fontenot -Nathan