linux-kernel - Re: [PATCH 1/4] of: use kbasename instead of open coding

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Date:   Sat, 17 Jun 2017 20:30:17 +0300
From:   Andy Shevchenko <andy.shevchenko@...il.com>
To:     Rob Herring <robh@...nel.org>
Cc:     Frank Rowand <frowand.list@...il.com>,
        Mark Rutland <mark.rutland@....com>,
        Pantelis Antoniou <pantelis.antoniou@...sulko.com>,
        Joe Perches <joe@...ches.com>,
        devicetree <devicetree@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 1/4] of: use kbasename instead of open coding

On Wed, Jun 14, 2017 at 11:30 PM, Rob Herring <robh@...nel.org> wrote:
> Several places in DT code open code the equivalent of kbasename.
> Replace them.
>
> The behavior for root nodes in node_name_cmp will be slightly different.
> Instead of comparing "/", "" will be compared. The comparison will be
> the same.

Reviewed-by: Andy Shevchenko <andy.shevhchenko@...il.com>

>
> Signed-off-by: Rob Herring <robh@...nel.org>
> ---
>  drivers/of/base.c     | 5 +----
>  drivers/of/platform.c | 2 +-
>  drivers/of/resolver.c | 4 ++--
>  3 files changed, 4 insertions(+), 7 deletions(-)
>
> diff --git a/drivers/of/base.c b/drivers/of/base.c
> index 28d5f53bc631..054159ccd5f8 100644
> --- a/drivers/of/base.c
> +++ b/drivers/of/base.c
> @@ -773,10 +773,7 @@ static struct device_node *__of_find_node_by_path(struct device_node *parent,
>                 return NULL;
>
>         __for_each_child_of_node(parent, child) {
> -               const char *name = strrchr(child->full_name, '/');
> -               if (WARN(!name, "malformed device_node %s\n", child->full_name))
> -                       continue;
> -               name++;
> +               const char *name = kbasename(child->full_name);
>                 if (strncmp(path, name, len) == 0 && (strlen(name) == len))
>                         return child;
>         }
> diff --git a/drivers/of/platform.c b/drivers/of/platform.c
> index 71fecc2debfc..8f73413fa243 100644
> --- a/drivers/of/platform.c
> +++ b/drivers/of/platform.c
> @@ -99,7 +99,7 @@ static void of_device_make_bus_id(struct device *dev)
>
>                 /* format arguments only used if dev_name() resolves to NULL */
>                 dev_set_name(dev, dev_name(dev) ? "%s:%s" : "%s",
> -                            strrchr(node->full_name, '/') + 1, dev_name(dev));
> +                            kbasename(node->full_name), dev_name(dev));
>                 node = node->parent;
>         }
>  }
> diff --git a/drivers/of/resolver.c b/drivers/of/resolver.c
> index 771f4844c781..63626d7d9adb 100644
> --- a/drivers/of/resolver.c
> +++ b/drivers/of/resolver.c
> @@ -165,8 +165,8 @@ static int update_usages_of_a_phandle_reference(struct device_node *overlay,
>  static int node_name_cmp(const struct device_node *dn1,
>                 const struct device_node *dn2)
>  {
> -       const char *n1 = strrchr(dn1->full_name, '/') ? : "/";
> -       const char *n2 = strrchr(dn2->full_name, '/') ? : "/";
> +       const char *n1 = kbasename(dn1->full_name);
> +       const char *n2 = kbasename(dn2->full_name);
>
>         return of_node_cmp(n1, n2);
>  }
> --
> 2.11.0
>



-- 
With Best Regards,
Andy Shevchenko