Subject: Re: [PATCH] bluetooth: hci_sock: Use type cast "(void *)" to avoid building warnings

From: Joe Perches <[email-masked]>
Date: Mon, 02 Feb 2015 12:39:58 -0800

On Tue, 2015-02-03 at 04:37 +0800, Chen Gang S wrote:
> The related warning (with allmodconfig under xtensa):
[]
> diff --git a/net/bluetooth/hci_sock.c b/net/bluetooth/hci_sock.c
[]
> @@ -952,7 +952,7 @@ static int hci_sock_sendmsg(struct kiocb *iocb, struct socket *sock,
>  
>  		if (((ogf > HCI_SFLT_MAX_OGF) ||
>  		     !hci_test_bit(ocf & HCI_FLT_OCF_BITS,
> -				   &hci_sec_filter.ocf_mask[ogf])) &&
> +				   (void *)&hci_sec_filter.ocf_mask[ogf])) &&
>  		    !capable(CAP_NET_RAW)) {
>  			err = -EPERM;
>  			goto drop;

Probably better to change the hci_test_bit to take const void *

static inline int hci_test_bit(int nr, void *addr)
{
	return *((__u32 *) addr + (nr >> 5)) & ((__u32) 1 << (nr & 31));
}