On Wed, Jul 03, 2019 at 11:10:44AM +0200, Rafael J. Wysocki wrote: > On Wed, Jul 3, 2019 at 9:17 AM Greg Kroah-Hartman > <[email protected]> wrote: > > > > As it is not recommended that debugfs calls be checked, it was pointed > > out that major errors should still be logged somewhere so that > > developers and users have a chance to figure out what went wrong. To > > help with this, error logging has been added to the debugfs core so that > > it is not needed to be present in every individual file that calls > > debugfs. > > > > Reported-by: Mark Brown <[email protected]> > > Reported-by: Takashi Iwai <[email protected]> > > Cc: "Rafael J. Wysocki" <[email protected]> > > Signed-off-by: Greg Kroah-Hartman <[email protected]> > > Generally speaking > > Reviewed-by: Rafael J. Wysocki <[email protected]> > > > --- > > fs/debugfs/inode.c | 25 ++++++++++++++++++++----- > > 1 file changed, 20 insertions(+), 5 deletions(-) > > > > diff --git a/fs/debugfs/inode.c b/fs/debugfs/inode.c > > index f04c8475d9a1..7f43c8acfcbf 100644 > > --- a/fs/debugfs/inode.c > > +++ b/fs/debugfs/inode.c > > @@ -2,8 +2,9 @@ > > /* > > * inode.c - part of debugfs, a tiny little debug file system > > * > > - * Copyright (C) 2004 Greg Kroah-Hartman <[email protected]> > > + * Copyright (C) 2004,2019 Greg Kroah-Hartman <[email protected]> > > * Copyright (C) 2004 IBM Inc. > > + * Copyright (C) 2019 Linux Foundation <[email protected]> > > * > > * debugfs is for people to use instead of /proc or /sys. > > * See ./Documentation/core-api/kernel-api.rst for more details. > > @@ -294,8 +295,10 @@ static struct dentry *start_creating(const char *name, > > struct dentry *parent) > > > > error = simple_pin_fs(&debug_fs_type, &debugfs_mount, > > &debugfs_mount_count); > > - if (error) > > + if (error) { > > + pr_err("Unable to pin filesystem for file '%s'\n", name); > > But I'm not sure about the log level here. Particularly, why would > pr_info() not work?
It could, but it is an error in that debugfs didn't do what was asked of it. I really don't care either way, the odds of anyone ever seeing this message is almost none :) thanks, greg k-h
