Hello On Thu, Oct 29, 2020 at 6:21 PM Masahiro Yamada <masahiroy@xxxxxxxxxx> wrote: > > On Fri, Oct 30, 2020 at 2:35 AM Anatol Pomozov <anatol.pomozov@xxxxxxxxx> wrote: > > > > Hi folks > > > > Here is a follow-up for this issue > > https://github.com/Open-CAS/open-cas-linux/issues/540 > > > > opencas project builds an out-of-tree kernel module and uses > > system-level kernel header. In my case these headers are installed to > > /lib/modules/5.9.1-arch1-1/build > > > > So if I do > > > > $ cd /lib/modules/5.9.1-arch1-1/build > > $ make kernelversion > > > > I get following output: > > > > mkdir: cannot create directory ‘.tmp_86541’: Permission denied > > mkdir: cannot create directory ‘.tmp_86543’: Permission denied > > mkdir: cannot create directory ‘.tmp_86545’: Permission denied > > mkdir: cannot create directory ‘.tmp_86547’: Permission denied > > ....... > > mkdir: cannot create directory ‘.tmp_86626’: Permission denied > > mkdir: cannot create directory ‘.tmp_86628’: Permission denied > > mkdir: cannot create directory ‘.tmp_86630’: Permission denied > > 5.9.1-arch1 > > > > This is because you did not pass M= option. > > > > /lib/modules/$(uname -r)/build > is used for building external modules. > > You cannot work in that directory > since it is usually read-only. > > > You need to pass M=<path-to-your-module> > > > This may work for you. > > > > $ cd /lib/modules/$(uname -r)/build > $ mkdir $HOME/foo > $ make M=$HOME/foo kernelversion Thanks a lot, it works!
