19.11.2021 15:30, Dan Carpenter пишет: > On Thu, Nov 18, 2021 at 04:56:38PM +0300, Dmitry Osipenko wrote: >> 18.11.2021 09:14, Dan Carpenter пишет: >>> It's not hard to run Smatch yourself... >>> >>> Depending on if you're on a apt distro or yum distro then fetch the >>> dependencies with one of the follow commands: >>> apt-get install gcc make sqlite3 libsqlite3-dev libdbd-sqlite3-perl libssl-dev libtry-tiny-perl >>> yum install gcc make sqlite3 sqlite-devel sqlite perl-DBD-SQLite openssl-devel perl-Try-Tiny >>> >>> git clone https://github.com/error27/smatch >>> cd smatch >>> make >>> cd ~/kernel_source/ >>> ~/smatch/smatch_scripts/kchecker drivers/subsystem/ >> >> Thanks, I was running Smatch couple times in the past. Finding how to >> run Smatch isn't the problem, the thing is that Smatch either isn't >> packaged by distros or packaged version is outdated, hence there is a >> need to maintain it by yourself. >> >> Also, is it guaranteed that Smatch will always work properly with >> linux-next? > > I work against linux-next every day so generally, yes. But that reminds > me that linux-next broke while I was on vacation and I haven't yet > pushed the fixes. > >> >> I imagine more developers could start to engage in using Smatch if >> kernel supported 'make smatch' command which would automate the process >> of fetching, building and running Smatch. >> >> Couldn't the "kernel" version of Smatch reside in the kernel's tools/? >> Or maybe just the parts of Smatch that are necessary for kernel >> checking, like kernel's DB/scripts and etc. Doesn't it make sense? > > I'm not sure that makes sense really... I'll expand on that in a bit > but the shorter answer is also that I don't have the bandwidth to make > it work. I just suck at releases and testing. So this would bitrot and > be horrible. > > Smatch does need a better way to manage data for other projects. Right > now linux-next is the first class citizen. It's the only thing where > I'm positive that it gets tested regularly. All the data in > smatch_data/ is from linux-next. > > And also there should be a better way to check specific version of the > kernel because people quite often use the same directory and just check > out v4.12 to test that and switch back. I do that and I've got scripts > on my system ./switch_to_tree4v1.sh which set up the symlinks for me. > > But for linux-next it's fine. Also by the time kernels have been > released the remaining Smatch warnings are almost all false positives. > > To me the data in smatch_data/ is not so important as the cross function > database. And the cross function database can't be distributed. It's > too huge and it's specific to a given .config. Thank you for the clarification.
