Re: [PATCH] staging:vt6655 Add extern variable in head file

[Greg KH]

On Tue, Jan 13, 2015 at 04:31:14PM +0800, sun wang wrote:
> Extern variable must be declared in head file. Compiler can catch the inconsistency when variable changes. 
> 
> Signed-off-by: Sun Wang <sun.wxg@xxxxxxxxx>
> ---
>  drivers/staging/vt6655/ioctl.c | 1 -
>  drivers/staging/vt6655/ioctl.h | 5 +++++
>  2 files changed, 5 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/staging/vt6655/ioctl.c b/drivers/staging/vt6655/ioctl.c
> index 970e80d..716fc89 100644
> --- a/drivers/staging/vt6655/ioctl.c
> +++ b/drivers/staging/vt6655/ioctl.c
> @@ -31,7 +31,6 @@
>   */
>  
>  #include "ioctl.h"
> -#include "iocmd.h"
>  #include "mac.h"
>  #include "card.h"
>  #include "hostap.h"
> diff --git a/drivers/staging/vt6655/ioctl.h b/drivers/staging/vt6655/ioctl.h
> index 2dc5a57..42f6910 100644
> --- a/drivers/staging/vt6655/ioctl.h
> +++ b/drivers/staging/vt6655/ioctl.h
> @@ -30,6 +30,11 @@
>  #define __IOCTL_H__
>  
>  #include "device.h"
> +#include "iocmd.h"
> +
> +#ifdef WPA_SM_Transtatus
> +extern SWPAResult wpa_Result;
> +#endif

I don't understand, what problem is this solving?  This variable isn't
in the driver at all.

confused,

greg k-h
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