Re: [PATCH 3/3] mm/vmalloc: extract show_busy_info from vmalloc_info_show

[Uladzislau Rezki <urezki@gmail.com>]

On Mon, Sep 14, 2026 at 09:38:24PM -0700, Andrew Morton wrote:
> On Mon, 14 Sep 2026 19:10:37 +0200 Uladzislau Rezki <urezki@gmail.com> wrote:
> 
> > On Mon, Sep 14, 2026 at 11:34:02AM +0800, Ye Liu wrote:
> > > From: Ye Liu <liuye@kylinos.cn>
> > > 
> > > Extract the busy vmap area iteration into show_busy_info, mirroring
> > > the existing show_purge_info pattern.
> > > 
> > > Signed-off-by: Ye Liu <liuye@kylinos.cn>
> > > ---
> > >  mm/vmalloc.c | 14 ++++++++++----
> > >  1 file changed, 10 insertions(+), 4 deletions(-)
> > > 
> > > diff --git a/mm/vmalloc.c b/mm/vmalloc.c
> > > index 797933ba9451..7638845377f5 100644
> > > --- a/mm/vmalloc.c
> > > +++ b/mm/vmalloc.c
> > > @@ -5345,12 +5345,12 @@ static void show_purge_info(struct seq_file *m)
> > >  	}
> > >  }
> > >  
> > > -static int vmalloc_info_show(struct seq_file *m, void *p)
> > > +static void show_busy_info(struct seq_file *m)
> > >  {
> > >  	struct vmap_node *vn;
> > >  	struct vmap_area *va;
> > >  	struct vm_struct *v;
> > > -	unsigned int *counters;
> > > +	unsigned int *counters = NULL;
> > >
> > Is setting counters setting to NULL odd here?
> 
> static void show_busy_info(struct seq_file *m)
> {
> 	...
> 	unsigned int *counters = NULL;
> 
> 	if (IS_ENABLED(CONFIG_NUMA))
> 		counters = ...
> 
> 	...
> 
> 	if (IS_ENABLED(CONFIG_NUMA))
> 		kfree(counters);
> 	...
> }
> 
> Presumably some dumb compiler or checker warned about
> kfree(uninitialized-val).
>
Probably.

--
Uladzislau Rezki