19.11.2021 15:30, Dan Carpenter пишет:

On Thu, Nov 18, 2021 at 04:56:38PM +0300, Dmitry Osipenko wrote:

quoted

18.11.2021 09:14, Dan Carpenter пишет:

quoted

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packaged by distros or packaged version is outdated, hence there is a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

quoted

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.