提交 b5d5843a 编写于 作者: A Akinobu Mita 提交者: David S. Miller

mISDN: use memchr_inv

Use memchr_inv to check if the data contains all same bytes.  It is
faster than looping for each byte.
Signed-off-by: NAkinobu Mita <akinobu.mita@gmail.com>
Cc: Karsten Keil <isdn@linux-pingi.de>
Cc: netdev@vger.kernel.org
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
上级 658ddaaf
......@@ -1112,7 +1112,7 @@ handle_bmsg(struct mISDNchannel *ch, struct sk_buff *skb)
struct l1oip *hc = bch->hw;
int ret = -EINVAL;
struct mISDNhead *hh = mISDN_HEAD_P(skb);
int l, ll, i;
int l, ll;
unsigned char *p;
switch (hh->prim) {
......@@ -1128,13 +1128,8 @@ handle_bmsg(struct mISDNchannel *ch, struct sk_buff *skb)
break;
}
/* check for AIS / ulaw-silence */
p = skb->data;
l = skb->len;
for (i = 0; i < l; i++) {
if (*p++ != 0xff)
break;
}
if (i == l) {
if (!memchr_inv(skb->data, 0xff, l)) {
if (debug & DEBUG_L1OIP_MSG)
printk(KERN_DEBUG "%s: got AIS, not sending, "
"but counting\n", __func__);
......@@ -1144,13 +1139,8 @@ handle_bmsg(struct mISDNchannel *ch, struct sk_buff *skb)
return 0;
}
/* check for silence */
p = skb->data;
l = skb->len;
for (i = 0; i < l; i++) {
if (*p++ != 0x2a)
break;
}
if (i == l) {
if (!memchr_inv(skb->data, 0x2a, l)) {
if (debug & DEBUG_L1OIP_MSG)
printk(KERN_DEBUG "%s: got silence, not sending"
", but counting\n", __func__);
......
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