On Mon, 22 Jun 2020 10:30:18 +0200 Peter Enderborg <peter.enderborg@xxxxxxxx> wrote: > This is a preparation for debugfs restricted mode. > We don't need debugfs to trace, the removed check stop tracefs to work > if debugfs is not initialised. We instead tries to automount within > debugfs and relay on it's handling. The code path is to create a > backward compatibility from when tracefs was part of debugfs, it is now > standalone and does not need debugfs. When debugfs is in restricted > it is compiled in but not active and return EPERM to clients and > tracefs wont work if it assumes it is active it is compiled in > kernel. > > Reported-by: kernel test robot <lkp@xxxxxxxxx> > Signed-off-by: Peter Enderborg <peter.enderborg@xxxxxxxx> Acked-by: Steven Rostedt (VMware) <rostedt@xxxxxxxxxxx> -- Steve > --- > kernel/trace/trace.c | 4 +--- > 1 file changed, 1 insertion(+), 3 deletions(-) > > diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c > index ec44b0e2a19c..34ed82364edb 100644 > --- a/kernel/trace/trace.c > +++ b/kernel/trace/trace.c > @@ -8946,9 +8946,7 @@ struct dentry *tracing_init_dentry(void) > if (tr->dir) > return NULL; > > - if (WARN_ON(!tracefs_initialized()) || > - (IS_ENABLED(CONFIG_DEBUG_FS) && > - WARN_ON(!debugfs_initialized()))) > + if (WARN_ON(!tracefs_initialized())) > return ERR_PTR(-ENODEV); > > /*
