linux-kernel - Re: [PATCH 2/2] mtd: core: Remove partid and partname debugfs files

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Date:   Tue, 21 Dec 2021 00:35:52 +0530
From:   Pratyush Yadav <p.yadav@...com>
To:     <Tudor.Ambarus@...rochip.com>
CC:     <miquel.raynal@...tlin.com>, <richard@....at>, <vigneshr@...com>,
        <zhuohao@...omium.org>, <michael@...le.cc>,
        <linux-mtd@...ts.infradead.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 2/2] mtd: core: Remove partid and partname debugfs files

On 20/12/21 01:23PM, Tudor.Ambarus@...rochip.com wrote:
> On 12/20/21 3:07 PM, Pratyush Yadav wrote:
> > EXTERNAL EMAIL: Do not click links or open attachments unless you know the content is safe
> > 
> > On 17/12/21 02:26PM, Tudor Ambarus wrote:
> >> partid and partname debugfs file are no longer used in mtd, remove
> 
> s/file/files
> 
> >> dead code.
> > 
> > Hmm, spi-nor was the only user? Quick grepping does confirm that.
> 
> Yes.
> 
> > 
> >>
> >> Signed-off-by: Tudor Ambarus <tudor.ambarus@...rochip.com>
> >> ---
> >>  drivers/mtd/mtdcore.c   | 35 +----------------------------------
> >>  include/linux/mtd/mtd.h |  3 ---
> >>  2 files changed, 1 insertion(+), 37 deletions(-)
> >>
> >> diff --git a/drivers/mtd/mtdcore.c b/drivers/mtd/mtdcore.c
> >> index 9186268d361b..1977755fc955 100644
> >> --- a/drivers/mtd/mtdcore.c
> >> +++ b/drivers/mtd/mtdcore.c
> >> @@ -336,49 +336,16 @@ static const struct device_type mtd_devtype = {
> >>       .release        = mtd_release,
> >>  };
> >>
> >> -static int mtd_partid_debug_show(struct seq_file *s, void *p)
> >> -{
> >> -     struct mtd_info *mtd = s->private;
> >> -
> >> -     seq_printf(s, "%s\n", mtd->dbg.partid);
> >> -
> >> -     return 0;
> >> -}
> >> -
> >> -DEFINE_SHOW_ATTRIBUTE(mtd_partid_debug);
> >> -
> >> -static int mtd_partname_debug_show(struct seq_file *s, void *p)
> >> -{
> >> -     struct mtd_info *mtd = s->private;
> >> -
> >> -     seq_printf(s, "%s\n", mtd->dbg.partname);
> >> -
> >> -     return 0;
> >> -}
> >> -
> >> -DEFINE_SHOW_ATTRIBUTE(mtd_partname_debug);
> >> -
> >>  static struct dentry *dfs_dir_mtd;
> >>
> >>  static void mtd_debugfs_populate(struct mtd_info *mtd)
> >>  {
> >> -     struct mtd_info *master = mtd_get_master(mtd);
> >>       struct device *dev = &mtd->dev;
> >> -     struct dentry *root;
> >>
> >>       if (IS_ERR_OR_NULL(dfs_dir_mtd))
> >>               return;
> >>
> >> -     root = debugfs_create_dir(dev_name(dev), dfs_dir_mtd);
> >> -     mtd->dbg.dfs_dir = root;
> >> -
> >> -     if (master->dbg.partid)
> >> -             debugfs_create_file("partid", 0400, root, master,
> >> -                                 &mtd_partid_debug_fops);
> >> -
> >> -     if (master->dbg.partname)
> >> -             debugfs_create_file("partname", 0400, root, master,
> >> -                                 &mtd_partname_debug_fops);
> >> +     mtd->dbg.dfs_dir = debugfs_create_dir(dev_name(dev), dfs_dir_mtd);
> > 
> > What is the point of having creating the directory if there is not going
> > to be anything in it at all? I think we should drop the entire thing if
> There will be files in it: mtdswap_stats, nandsim_wear_report, docg3 files.
> 
> $ git grep dbg.dfs_dir drivers/mtd/
> drivers/mtd/devices/docg3.c:    struct dentry *root = floor->dbg.dfs_dir;
> drivers/mtd/mtdcore.c:  mtd->dbg.dfs_dir = root;
> drivers/mtd/mtdcore.c:          debugfs_remove_recursive(mtd->dbg.dfs_dir);
> drivers/mtd/mtdswap.c:  struct dentry *root = d->mtd->dbg.dfs_dir;
> drivers/mtd/nand/raw/nandsim.c: struct dentry *root = nsmtd->dbg.dfs_dir;
> drivers/mtd/ubi/debug.c:                debugfs_remove_recursive(ubi->dbg.dfs_dir);

Ok, I didn't see that. In that case,

Reviewed-by: Pratyush Yadav <p.yadav@...com>

-- 
Regards,
Pratyush Yadav
Texas Instruments Inc.