From mboxrd@z Thu Jan 1 00:00:00 1970 From: =?ISO-8859-1?Q?J=F6rg?= Krause Date: Wed, 02 Nov 2016 20:56:59 +0100 Subject: [Buildroot] [PATCH] ubifs: Fix regression in ubifs_readdir() In-Reply-To: <20161101232215.5bf7cabd@free-electrons.com> References: <1477648432-9543-1-git-send-email-richard@nod.at> <1477671544.8927.1.camel@embedded.rocks> <1477693395.31471.1.camel@embedded.rocks> <20161101232215.5bf7cabd@free-electrons.com> Message-ID: <1478116619.8549.1.camel@embedded.rocks> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: buildroot@busybox.net On Tue, 2016-11-01 at 23:22 +0100, Thomas Petazzoni wrote: > Hello J?rg, > > [E-mail thread hijacked from the linux-mtd mailing list, since there > is > a Buildroot related problem reported.] > > On Sat, 29 Oct 2016 00:23:15 +0200, J?rg Krause wrote: > > > > > I'm not sure if it's related to the issue reported by Peter > > > > Rosin > > > > and > > > > Ralph Sennhauser, but I am still getting a kernel panic using > > > > UBIFS > > > > with OverlayFS on Linux v4.9.0-rc2 with this patch applied:?? > > > > > > Does reverting c83ed4c9dbb35 help? > > > And are you 100% sure you applied the fix??? > > > > I double double checked. The fix was applied on the git tree, but > > the > > compiler cache (I am using Buildroot with this option enabled) > > fooled > > me by using an old copy. After disabling the compiler cache I got a > > fixed build of the kernel. The panic is gone! Thanks! > > This is *really* bad. Which Buildroot version are you using? 2016.11 # Note that I am using Buildroot as a submodule [1] and I needed to port the br2-external tree. Maybe I messed something up? > Are you able to reproduce the bad ccache behavior here? Yes, I am. Linux kernel source directory is located locally and the path is set using LINUX_OVERRIDE_SRCDIR in local.mk. 1/ Checkout Linux kernel version 4.7.10 2/ make linux-dirclean all 3/ Booted Linux version is 4.7.10 4/ Checkout Linux kernel version 4.8.5 5/ make linux-dirclean all 6/ Booted Linux version is still 4.7.10 > A modified source code should definitely lead to a different hash of > the preprocessed code, and therefore there shouldn't be such a > confusion between two cache results. I checked the Linux source files in output/build/linux-custom/ and they are correct - after step 2 the directory contains the Linux sources of version 4.7.10 and after step 5 it contains version 4.8.5. [1] https://github.com/Openwide-Ingenierie/buildroot-submodule Best regards, J?rg Krause