On Mon, May 15, 2023 at 09:17:39PM -0700, Luis Chamberlain wrote:
> Awesome!
>
> On Mon, May 15, 2023 at 09:14:42AM +0200, Joel Granados wrote:
> > +
> > + port_name_len = strnlen(port->name, PARPORT_NAME_MAX_LEN);
> > + /*
> > + * Allocate a buffer for two paths: dev/parport/PORT and dev/parport/PORT/devices.
> > + * We calculate for the second as that will give us enough for the first.
> > + */
> > + tmp_path_len = PARPORT_BASE_DEVICES_PATH_SIZE + port_name_len;
> > + tmp_dir_path = kmalloc(tmp_path_len, GFP_KERNEL);
>
> Any reason why not kzalloc()?
nope. Will zero it out.
>
> > + if (!tmp_dir_path) {
> > + err = -ENOMEM;
> > + goto exit_free_t;
> > + }
> >
> > - t->port_dir[0].procname = port->name;
> > + if (tmp_path_len
> > + <= snprintf(tmp_dir_path, tmp_path_len, "dev/parport/%s/devices", port->name)) {
>
> Since we are clearing up obfuscation code, it would be nicer to
> make this easier to read and split the snprintf() into one line, capture
> the error there. And then in a new line do the check. Even if we have to
> add a new int value here.
np. Will do something like this:
num_chars_sprinted = snprintf(....
if(tmp_path_len <= num_chars_sprinted) {
err = -ENOENT;
...
}
>
> Other than this I'd just ask to extend the commit log to use
> the before and after of vmlinux (when this module is compiled in with all
> the bells and whistles) with ./scripts/bloat-o-meter.
>
> Ie build before the patch and cp vmlinux to vmlinux.old and then compare
> with:
>
> ./scripts/bloat-o-meter vmlinux.old vmlinux
>
> Can you also describe any testing if any.
Sure thing. Will add the bloat-o-meter output on the last patch so as to
gather the results for all the patches.
I'll write some testing info on the patches.
>
> With the above changes, feel free to add to all these patches:
>
> Reviewed-by: Luis Chamberlain
Ack
>
> > + if (register_sysctl(tmp_dir_path, t->device_dir) == NULL)
>
> BTW, we should be able to remove now replace register_sysctl_base() with a simple
> register_sysctl("kernel", foo), and then one for "fs", and one of "vm"
> on kernel/sysctl.c and just remove:
>
> * DECLARE_SYSCTL_BASE() & register_sysctl_base() & __register_sysctl_base()
> * and then after all this register_sysctl_table() completely
>
> Let me know if you'd like a stab at it, or if you prefer me to do that.
I think I can give it a go. Should I just add that to these set of
patches? or should we create a new patch set?
>
> Luis
>
>
best
--
Joel Granados
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