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 packaged by distros or packaged version is outdated, hence there is a 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. regards, dan carpenter
