[PATCH 5/5, revised] staging/otus: Drop an unnecessary NULL test

[PATCH 5/5, revised] staging/otus: Drop an unnecessary NULL test

[Julia Lawall]

From: Julia Lawall <julia@diku.dk>

Apparently, the NULL test is not necessary at this point.

The semantic patch that finds this problem is as follows:
(http://www.emn.fr/x-info/coccinelle/)

// <smpl>
@@
type T;
expression E;
identifier i,fld;
statement S;
@@

- T i = E->fld;
+ T i;
  ... when != E
      when != i
  if (E = NULL) S
+ i = E->fld;
// </smpl>

Signed-off-by: Julia Lawall <julia@diku.dk>

---
 drivers/staging/otus/wwrap.c |    5 -----
 1 file changed, 5 deletions(-)

diff --git a/drivers/staging/otus/wwrap.c b/drivers/staging/otus/wwrap.c
index 4db8f6e..855ff41 100644
--- a/drivers/staging/otus/wwrap.c
+++ b/drivers/staging/otus/wwrap.c
@@ -1018,11 +1018,6 @@ void kevent(struct work_struct *work)
                container_of(work, struct usbdrv_private, kevent);
     zdev_t *dev = macp->device;
 
-    if (macp = NULL)
-    {
-        return;
-    }
-
     if (test_and_set_bit(0, (void *)&smp_kevent_Lock))
     {
         //schedule_work(&macp->kevent);

Re: [PATCH 5/5, revised] staging/otus: Drop an unnecessary NULL test

[Jiri Slaby]

On 07/11/2009 10:32 AM, Julia Lawall wrote:
> Apparently, the NULL test is not necessary at this point.
> 
> The semantic patch that finds this problem is as follows:
> (http://www.emn.fr/x-info/coccinelle/)
...
> Signed-off-by: Julia Lawall <julia@diku.dk>

Acked-by: Jiri Slaby <jirislaby@gmail.com>

Re: [PATCH 5/5, revised] staging/otus: Drop an unnecessary NULL

[Greg KH]

On Sat, Jul 11, 2009 at 10:32:23AM +0200, Julia Lawall wrote:
> From: Julia Lawall <julia@diku.dk>
> 
> Apparently, the NULL test is not necessary at this point.
> 
> The semantic patch that finds this problem is as follows:
> (http://www.emn.fr/x-info/coccinelle/)
> 
> // <smpl>
> @@
> type T;
> expression E;
> identifier i,fld;
> statement S;
> @@
> 
> - T i = E->fld;
> + T i;
>   ... when != E
>       when != i
>   if (E = NULL) S
> + i = E->fld;
> // </smpl>
> 
> Signed-off-by: Julia Lawall <julia@diku.dk>
> 
> ---
>  drivers/staging/otus/wwrap.c |    5 -----
>  1 file changed, 5 deletions(-)
> 
> diff --git a/drivers/staging/otus/wwrap.c b/drivers/staging/otus/wwrap.c
> index 4db8f6e..855ff41 100644
> --- a/drivers/staging/otus/wwrap.c
> +++ b/drivers/staging/otus/wwrap.c
> @@ -1018,11 +1018,6 @@ void kevent(struct work_struct *work)
>                 container_of(work, struct usbdrv_private, kevent);
>      zdev_t *dev = macp->device;
>  
> -    if (macp = NULL)
> -    {
> -        return;
> -    }
> -

Ok, that will teach me to read all of my mail before responding... :)

This looks good, I'll queue it up, thanks.

greg k-h