linux-kernel - Re: [PATCH v2] usb: g_ffs: fix compilation warning

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Message-ID: <5251DDDA.3070606@cogentembedded.com>
Date:	Mon, 07 Oct 2013 00:02:02 +0200
From:	Sergei Shtylyov <sergei.shtylyov@...entembedded.com>
To:	David Cohen <david.a.cohen@...ux.intel.com>
CC:	gregkh@...uxfoundation.org, balbi@...com,
	linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] usb: g_ffs: fix compilation warning

Hello.

On 05-10-2013 0:30, David Cohen wrote:

> If USB_FUNCTIONFS is selected without USB_FUNCTIONFS_ETH and
> USB_FUNCTIONFS_RNIS, u_ether.h won't be included and then
> USB_ETHERNET_MODULE_PARAMAETERS macro won't be available causing the
> following warning compilation:

> drivers/usb/gadget/g_ffs.c:81:1: warning: data definition has no type or
> storage class [enabled by default]
> drivers/usb/gadget/g_ffs.c:81:1: warning: type defaults to ‘int’ in
> declaration of ‘USB_ETHERNET_MODULE_PARAMETERS’ [-Wimplicit-int]
> drivers/usb/gadget/g_ffs.c:81:1: warning: function declaration isn’t a
> prototype [-Wstrict-prototypes]

> This patch fixes the warning by making USB_ETHERNET_MODULE_PARAMETERS to
> be used iff u_ether.h is included, otherwise it is not needed.

> Signed-off-by: David Cohen <david.a.cohen@...ux.intel.com>
> ---
>   drivers/usb/gadget/g_ffs.c | 2 ++
>   1 file changed, 2 insertions(+)

> diff --git a/drivers/usb/gadget/g_ffs.c b/drivers/usb/gadget/g_ffs.c
> index 5327c82..2344efe 100644
> --- a/drivers/usb/gadget/g_ffs.c
> +++ b/drivers/usb/gadget/g_ffs.c
> @@ -76,7 +76,9 @@ struct gfs_ffs_obj {
>
>   USB_GADGET_COMPOSITE_OPTIONS();
>
> +#if defined CONFIG_USB_FUNCTIONFS_ETH || defined CONFIG_USB_FUNCTIONFS_RNDIS

    I thought the 'defined' operator requires ()?

WBR, Sergei

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