Andrei Vagin <avagin@xxxxxxxxxx> wrote: > +static const char dev[] = "s test_fsopen_123"; Did you mean to prefix that with "s "? > + if (sys_fsconfig(fsfd, FSCONFIG_SET_STRING, "source", dev, 0) < 0) > + return pr_err("fsconfig_set_string sets source = %s", dev); Note that it's not necessary to provide a source for /proc since it will just ignore it. Anyway, thanks for doing this! David