Gitweb:     
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=cd228d5458186f66bc36c4884f4f26ed955c5945
Commit:     cd228d5458186f66bc36c4884f4f26ed955c5945
Parent:     dbb2ed24851a290616d66212dc75373fd863d636
Author:     Joe Perches <[EMAIL PROTECTED]>
AuthorDate: Mon Nov 12 18:07:31 2007 -0800
Committer:  David S. Miller <[EMAIL PROTECTED]>
CommitDate: Mon Nov 12 18:07:31 2007 -0800

    [PPP]: Remove ptr comparisons to 0
    
    fix sparse warnings "Using plain integer as NULL pointer"
    
    Signed-off-by: Joe Perches <[EMAIL PROTECTED]>
    Signed-off-by: David S. Miller <[EMAIL PROTECTED]>
---
 drivers/net/ppp_async.c   |   34 ++++++------
 drivers/net/ppp_generic.c |  126 ++++++++++++++++++++++----------------------
 drivers/net/ppp_synctty.c |   27 +++++-----
 3 files changed, 94 insertions(+), 93 deletions(-)

diff --git a/drivers/net/ppp_async.c b/drivers/net/ppp_async.c
index 8d278c8..f023d5b 100644
--- a/drivers/net/ppp_async.c
+++ b/drivers/net/ppp_async.c
@@ -160,7 +160,7 @@ ppp_asynctty_open(struct tty_struct *tty)
 
        err = -ENOMEM;
        ap = kzalloc(sizeof(*ap), GFP_KERNEL);
-       if (ap == 0)
+       if (!ap)
                goto out;
 
        /* initialize the asyncppp structure */
@@ -215,7 +215,7 @@ ppp_asynctty_close(struct tty_struct *tty)
        ap = tty->disc_data;
        tty->disc_data = NULL;
        write_unlock_irq(&disc_data_lock);
-       if (ap == 0)
+       if (!ap)
                return;
 
        /*
@@ -230,10 +230,10 @@ ppp_asynctty_close(struct tty_struct *tty)
        tasklet_kill(&ap->tsk);
 
        ppp_unregister_channel(&ap->chan);
-       if (ap->rpkt != 0)
+       if (ap->rpkt)
                kfree_skb(ap->rpkt);
        skb_queue_purge(&ap->rqueue);
-       if (ap->tpkt != 0)
+       if (ap->tpkt)
                kfree_skb(ap->tpkt);
        kfree(ap);
 }
@@ -285,13 +285,13 @@ ppp_asynctty_ioctl(struct tty_struct *tty, struct file 
*file,
        int err, val;
        int __user *p = (int __user *)arg;
 
-       if (ap == 0)
+       if (!ap)
                return -ENXIO;
        err = -EFAULT;
        switch (cmd) {
        case PPPIOCGCHAN:
                err = -ENXIO;
-               if (ap == 0)
+               if (!ap)
                        break;
                err = -EFAULT;
                if (put_user(ppp_channel_index(&ap->chan), p))
@@ -301,7 +301,7 @@ ppp_asynctty_ioctl(struct tty_struct *tty, struct file 
*file,
 
        case PPPIOCGUNIT:
                err = -ENXIO;
-               if (ap == 0)
+               if (!ap)
                        break;
                err = -EFAULT;
                if (put_user(ppp_unit_number(&ap->chan), p))
@@ -350,7 +350,7 @@ ppp_asynctty_receive(struct tty_struct *tty, const unsigned 
char *buf,
        struct asyncppp *ap = ap_get(tty);
        unsigned long flags;
 
-       if (ap == 0)
+       if (!ap)
                return;
        spin_lock_irqsave(&ap->recv_lock, flags);
        ppp_async_input(ap, buf, cflags, count);
@@ -369,7 +369,7 @@ ppp_asynctty_wakeup(struct tty_struct *tty)
        struct asyncppp *ap = ap_get(tty);
 
        clear_bit(TTY_DO_WRITE_WAKEUP, &tty->flags);
-       if (ap == 0)
+       if (!ap)
                return;
        set_bit(XMIT_WAKEUP, &ap->xmit_flags);
        tasklet_schedule(&ap->tsk);
@@ -684,7 +684,7 @@ ppp_async_push(struct asyncppp *ap)
                                tty_stuffed = 1;
                        continue;
                }
-               if (ap->optr >= ap->olim && ap->tpkt != 0) {
+               if (ap->optr >= ap->olim && ap->tpkt) {
                        if (ppp_async_encode(ap)) {
                                /* finished processing ap->tpkt */
                                clear_bit(XMIT_FULL, &ap->xmit_flags);
@@ -704,7 +704,7 @@ ppp_async_push(struct asyncppp *ap)
                clear_bit(XMIT_BUSY, &ap->xmit_flags);
                /* any more work to do? if not, exit the loop */
                if (!(test_bit(XMIT_WAKEUP, &ap->xmit_flags)
-                     || (!tty_stuffed && ap->tpkt != 0)))
+                     || (!tty_stuffed && ap->tpkt)))
                        break;
                /* more work to do, see if we can do it now */
                if (test_and_set_bit(XMIT_BUSY, &ap->xmit_flags))
@@ -715,7 +715,7 @@ ppp_async_push(struct asyncppp *ap)
 
 flush:
        clear_bit(XMIT_BUSY, &ap->xmit_flags);
-       if (ap->tpkt != 0) {
+       if (ap->tpkt) {
                kfree_skb(ap->tpkt);
                ap->tpkt = NULL;
                clear_bit(XMIT_FULL, &ap->xmit_flags);
@@ -848,7 +848,7 @@ ppp_async_input(struct asyncppp *ap, const unsigned char 
*buf,
                s = 0;
                for (i = 0; i < count; ++i) {
                        c = buf[i];
-                       if (flags != 0 && flags[i] != 0)
+                       if (flags && flags[i] != 0)
                                continue;
                        s |= (c & 0x80)? SC_RCV_B7_1: SC_RCV_B7_0;
                        c = ((c >> 4) ^ c) & 0xf;
@@ -865,7 +865,7 @@ ppp_async_input(struct asyncppp *ap, const unsigned char 
*buf,
                        n = scan_ordinary(ap, buf, count);
 
                f = 0;
-               if (flags != 0 && (ap->state & SC_TOSS) == 0) {
+               if (flags && (ap->state & SC_TOSS) == 0) {
                        /* check the flags to see if any char had an error */
                        for (j = 0; j < n; ++j)
                                if ((f = flags[j]) != 0)
@@ -878,9 +878,9 @@ ppp_async_input(struct asyncppp *ap, const unsigned char 
*buf,
                } else if (n > 0 && (ap->state & SC_TOSS) == 0) {
                        /* stuff the chars in the skb */
                        skb = ap->rpkt;
-                       if (skb == 0) {
+                       if (!skb) {
                                skb = dev_alloc_skb(ap->mru + PPP_HDRLEN + 2);
-                               if (skb == 0)
+                               if (!skb)
                                        goto nomem;
                                ap->rpkt = skb;
                        }
@@ -927,7 +927,7 @@ ppp_async_input(struct asyncppp *ap, const unsigned char 
*buf,
                ++n;
 
                buf += n;
-               if (flags != 0)
+               if (flags)
                        flags += n;
                count -= n;
        }
diff --git a/drivers/net/ppp_generic.c b/drivers/net/ppp_generic.c
index 4b49d0e..4f69037 100644
--- a/drivers/net/ppp_generic.c
+++ b/drivers/net/ppp_generic.c
@@ -367,7 +367,7 @@ static int ppp_release(struct inode *inode, struct file 
*file)
        struct ppp_file *pf = file->private_data;
        struct ppp *ppp;
 
-       if (pf != 0) {
+       if (pf) {
                file->private_data = NULL;
                if (pf->kind == INTERFACE) {
                        ppp = PF_TO_PPP(pf);
@@ -398,7 +398,7 @@ static ssize_t ppp_read(struct file *file, char __user *buf,
 
        ret = count;
 
-       if (pf == 0)
+       if (!pf)
                return -ENXIO;
        add_wait_queue(&pf->rwait, &wait);
        for (;;) {
@@ -431,7 +431,7 @@ static ssize_t ppp_read(struct file *file, char __user *buf,
        set_current_state(TASK_RUNNING);
        remove_wait_queue(&pf->rwait, &wait);
 
-       if (skb == 0)
+       if (!skb)
                goto out;
 
        ret = -EOVERFLOW;
@@ -455,11 +455,11 @@ static ssize_t ppp_write(struct file *file, const char 
__user *buf,
        struct sk_buff *skb;
        ssize_t ret;
 
-       if (pf == 0)
+       if (!pf)
                return -ENXIO;
        ret = -ENOMEM;
        skb = alloc_skb(count + pf->hdrlen, GFP_KERNEL);
-       if (skb == 0)
+       if (!skb)
                goto out;
        skb_reserve(skb, pf->hdrlen);
        ret = -EFAULT;
@@ -491,11 +491,11 @@ static unsigned int ppp_poll(struct file *file, 
poll_table *wait)
        struct ppp_file *pf = file->private_data;
        unsigned int mask;
 
-       if (pf == 0)
+       if (!pf)
                return 0;
        poll_wait(file, &pf->rwait, wait);
        mask = POLLOUT | POLLWRNORM;
-       if (skb_peek(&pf->rq) != 0)
+       if (skb_peek(&pf->rq))
                mask |= POLLIN | POLLRDNORM;
        if (pf->dead)
                mask |= POLLHUP;
@@ -559,7 +559,7 @@ static int ppp_ioctl(struct inode *inode, struct file *file,
        void __user *argp = (void __user *)arg;
        int __user *p = argp;
 
-       if (pf == 0)
+       if (!pf)
                return ppp_unattached_ioctl(pf, file, cmd, arg);
 
        if (cmd == PPPIOCDETACH) {
@@ -689,13 +689,13 @@ static int ppp_ioctl(struct inode *inode, struct file 
*file,
                        val &= 0xffff;
                }
                vj = slhc_init(val2+1, val+1);
-               if (vj == 0) {
+               if (!vj) {
                        printk(KERN_ERR "PPP: no memory (VJ compressor)\n");
                        err = -ENOMEM;
                        break;
                }
                ppp_lock(ppp);
-               if (ppp->vj != 0)
+               if (ppp->vj)
                        slhc_free(ppp->vj);
                ppp->vj = vj;
                ppp_unlock(ppp);
@@ -786,7 +786,7 @@ static int ppp_unattached_ioctl(struct ppp_file *pf, struct 
file *file,
                if (get_user(unit, p))
                        break;
                ppp = ppp_create_interface(unit, &err);
-               if (ppp == 0)
+               if (!ppp)
                        break;
                file->private_data = &ppp->file;
                ppp->owner = file;
@@ -803,7 +803,7 @@ static int ppp_unattached_ioctl(struct ppp_file *pf, struct 
file *file,
                mutex_lock(&all_ppp_mutex);
                err = -ENXIO;
                ppp = ppp_find_unit(unit);
-               if (ppp != 0) {
+               if (ppp) {
                        atomic_inc(&ppp->file.refcnt);
                        file->private_data = &ppp->file;
                        err = 0;
@@ -817,7 +817,7 @@ static int ppp_unattached_ioctl(struct ppp_file *pf, struct 
file *file,
                spin_lock_bh(&all_channels_lock);
                err = -ENXIO;
                chan = ppp_find_channel(unit);
-               if (chan != 0) {
+               if (chan) {
                        atomic_inc(&chan->file.refcnt);
                        file->private_data = &chan->file;
                        err = 0;
@@ -946,9 +946,9 @@ ppp_net_ioctl(struct net_device *dev, struct ifreq *ifr, 
int cmd)
 
        case SIOCGPPPCSTATS:
                memset(&cstats, 0, sizeof(cstats));
-               if (ppp->xc_state != 0)
+               if (ppp->xc_state)
                        ppp->xcomp->comp_stat(ppp->xc_state, &cstats.c);
-               if (ppp->rc_state != 0)
+               if (ppp->rc_state)
                        ppp->rcomp->decomp_stat(ppp->rc_state, &cstats.d);
                if (copy_to_user(addr, &cstats, sizeof(cstats)))
                        break;
@@ -993,14 +993,14 @@ ppp_xmit_process(struct ppp *ppp)
        struct sk_buff *skb;
 
        ppp_xmit_lock(ppp);
-       if (ppp->dev != 0) {
+       if (ppp->dev) {
                ppp_push(ppp);
-               while (ppp->xmit_pending == 0
-                      && (skb = skb_dequeue(&ppp->file.xq)) != 0)
+               while (!ppp->xmit_pending
+                      && (skb = skb_dequeue(&ppp->file.xq)))
                        ppp_send_frame(ppp, skb);
                /* If there's no work left to do, tell the core net
                   code that we can accept some more. */
-               if (ppp->xmit_pending == 0 && skb_peek(&ppp->file.xq) == 0)
+               if (!ppp->xmit_pending && !skb_peek(&ppp->file.xq))
                        netif_wake_queue(ppp->dev);
        }
        ppp_xmit_unlock(ppp);
@@ -1100,12 +1100,12 @@ ppp_send_frame(struct ppp *ppp, struct sk_buff *skb)
 
        switch (proto) {
        case PPP_IP:
-               if (ppp->vj == 0 || (ppp->flags & SC_COMP_TCP) == 0)
+               if (!ppp->vj || (ppp->flags & SC_COMP_TCP) == 0)
                        break;
                /* try to do VJ TCP header compression */
                new_skb = alloc_skb(skb->len + ppp->dev->hard_header_len - 2,
                                    GFP_ATOMIC);
-               if (new_skb == 0) {
+               if (!new_skb) {
                        printk(KERN_ERR "PPP: no memory (VJ comp pkt)\n");
                        goto drop;
                }
@@ -1140,7 +1140,7 @@ ppp_send_frame(struct ppp *ppp, struct sk_buff *skb)
        }
 
        /* try to do packet compression */
-       if ((ppp->xstate & SC_COMP_RUN) && ppp->xc_state != 0
+       if ((ppp->xstate & SC_COMP_RUN) && ppp->xc_state
            && proto != PPP_LCP && proto != PPP_CCP) {
                if (!(ppp->flags & SC_CCP_UP) && (ppp->flags & SC_MUST_COMP)) {
                        if (net_ratelimit())
@@ -1185,7 +1185,7 @@ ppp_push(struct ppp *ppp)
        struct channel *pch;
        struct sk_buff *skb = ppp->xmit_pending;
 
-       if (skb == 0)
+       if (!skb)
                return;
 
        list = &ppp->channels;
@@ -1355,7 +1355,7 @@ static int ppp_mp_explode(struct ppp *ppp, struct sk_buff 
*skb)
                if (flen == len && nfree == 0)
                        bits |= E;
                frag = alloc_skb(flen + hdrlen + (flen == 0), GFP_ATOMIC);
-               if (frag == 0)
+               if (!frag)
                        goto noskb;
                q = skb_put(frag, flen + hdrlen);
 
@@ -1425,7 +1425,7 @@ ppp_channel_push(struct channel *pch)
        struct ppp *ppp;
 
        spin_lock_bh(&pch->downl);
-       if (pch->chan != 0) {
+       if (pch->chan) {
                while (!skb_queue_empty(&pch->file.xq)) {
                        skb = skb_dequeue(&pch->file.xq);
                        if (!pch->chan->ops->start_xmit(pch->chan, skb)) {
@@ -1443,7 +1443,7 @@ ppp_channel_push(struct channel *pch)
        if (skb_queue_empty(&pch->file.xq)) {
                read_lock_bh(&pch->upl);
                ppp = pch->ppp;
-               if (ppp != 0)
+               if (ppp)
                        ppp_xmit_process(ppp);
                read_unlock_bh(&pch->upl);
        }
@@ -1462,7 +1462,7 @@ ppp_do_recv(struct ppp *ppp, struct sk_buff *skb, struct 
channel *pch)
 {
        ppp_recv_lock(ppp);
        /* ppp->dev == 0 means interface is closing down */
-       if (ppp->dev != 0)
+       if (ppp->dev)
                ppp_receive_frame(ppp, skb, pch);
        else
                kfree_skb(skb);
@@ -1475,19 +1475,19 @@ ppp_input(struct ppp_channel *chan, struct sk_buff *skb)
        struct channel *pch = chan->ppp;
        int proto;
 
-       if (pch == 0 || skb->len == 0) {
+       if (!pch || skb->len == 0) {
                kfree_skb(skb);
                return;
        }
 
        proto = PPP_PROTO(skb);
        read_lock_bh(&pch->upl);
-       if (pch->ppp == 0 || proto >= 0xc000 || proto == PPP_CCPFRAG) {
+       if (!pch->ppp || proto >= 0xc000 || proto == PPP_CCPFRAG) {
                /* put it on the channel queue */
                skb_queue_tail(&pch->file.rq, skb);
                /* drop old frames if queue too long */
                while (pch->file.rq.qlen > PPP_MAX_RQLEN
-                      && (skb = skb_dequeue(&pch->file.rq)) != 0)
+                      && (skb = skb_dequeue(&pch->file.rq)))
                        kfree_skb(skb);
                wake_up_interruptible(&pch->file.rwait);
        } else {
@@ -1503,13 +1503,13 @@ ppp_input_error(struct ppp_channel *chan, int code)
        struct channel *pch = chan->ppp;
        struct sk_buff *skb;
 
-       if (pch == 0)
+       if (!pch)
                return;
 
        read_lock_bh(&pch->upl);
-       if (pch->ppp != 0) {
+       if (pch->ppp) {
                skb = alloc_skb(0, GFP_ATOMIC);
-               if (skb != 0) {
+               if (skb) {
                        skb->len = 0;           /* probably unnecessary */
                        skb->cb[0] = code;
                        ppp_do_recv(pch->ppp, skb, pch);
@@ -1548,7 +1548,7 @@ static void
 ppp_receive_error(struct ppp *ppp)
 {
        ++ppp->stats.rx_errors;
-       if (ppp->vj != 0)
+       if (ppp->vj)
                slhc_toss(ppp->vj);
 }
 
@@ -1563,7 +1563,7 @@ ppp_receive_nonmp_frame(struct ppp *ppp, struct sk_buff 
*skb)
         * Note that some decompressors need to see uncompressed frames
         * that come in as well as compressed frames.
         */
-       if (ppp->rc_state != 0 && (ppp->rstate & SC_DECOMP_RUN)
+       if (ppp->rc_state && (ppp->rstate & SC_DECOMP_RUN)
            && (ppp->rstate & (SC_DC_FERROR | SC_DC_ERROR)) == 0)
                skb = ppp_decompress_frame(ppp, skb);
 
@@ -1574,13 +1574,13 @@ ppp_receive_nonmp_frame(struct ppp *ppp, struct sk_buff 
*skb)
        switch (proto) {
        case PPP_VJC_COMP:
                /* decompress VJ compressed packets */
-               if (ppp->vj == 0 || (ppp->flags & SC_REJ_COMP_TCP))
+               if (!ppp->vj || (ppp->flags & SC_REJ_COMP_TCP))
                        goto err;
 
                if (skb_tailroom(skb) < 124 || skb_cloned(skb)) {
                        /* copy to a new sk_buff with more tailroom */
                        ns = dev_alloc_skb(skb->len + 128);
-                       if (ns == 0) {
+                       if (!ns) {
                                printk(KERN_ERR"PPP: no memory (VJ decomp)\n");
                                goto err;
                        }
@@ -1606,7 +1606,7 @@ ppp_receive_nonmp_frame(struct ppp *ppp, struct sk_buff 
*skb)
                break;
 
        case PPP_VJC_UNCOMP:
-               if (ppp->vj == 0 || (ppp->flags & SC_REJ_COMP_TCP))
+               if (!ppp->vj || (ppp->flags & SC_REJ_COMP_TCP))
                        goto err;
 
                /* Until we fix the decompressor need to make sure
@@ -1636,7 +1636,7 @@ ppp_receive_nonmp_frame(struct ppp *ppp, struct sk_buff 
*skb)
                skb_queue_tail(&ppp->file.rq, skb);
                /* limit queue length by dropping old frames */
                while (ppp->file.rq.qlen > PPP_MAX_RQLEN
-                      && (skb = skb_dequeue(&ppp->file.rq)) != 0)
+                      && (skb = skb_dequeue(&ppp->file.rq)))
                        kfree_skb(skb);
                /* wake up any process polling or blocking on read */
                wake_up_interruptible(&ppp->file.rwait);
@@ -1718,7 +1718,7 @@ ppp_decompress_frame(struct ppp *ppp, struct sk_buff *skb)
                }
 
                ns = dev_alloc_skb(obuff_size);
-               if (ns == 0) {
+               if (!ns) {
                        printk(KERN_ERR "ppp_decompress_frame: no memory\n");
                        goto err;
                }
@@ -1836,7 +1836,7 @@ ppp_receive_mp_frame(struct ppp *ppp, struct sk_buff 
*skb, struct channel *pch)
                ppp->minseq = ppp->mrq.next->sequence;
 
        /* Pull completed packets off the queue and receive them. */
-       while ((skb = ppp_mp_reconstruct(ppp)) != 0)
+       while ((skb = ppp_mp_reconstruct(ppp)))
                ppp_receive_nonmp_frame(ppp, skb);
 
        return;
@@ -2002,7 +2002,7 @@ ppp_register_channel(struct ppp_channel *chan)
        struct channel *pch;
 
        pch = kzalloc(sizeof(struct channel), GFP_KERNEL);
-       if (pch == 0)
+       if (!pch)
                return -ENOMEM;
        pch->ppp = NULL;
        pch->chan = chan;
@@ -2030,7 +2030,7 @@ int ppp_channel_index(struct ppp_channel *chan)
 {
        struct channel *pch = chan->ppp;
 
-       if (pch != 0)
+       if (pch)
                return pch->file.index;
        return -1;
 }
@@ -2043,9 +2043,9 @@ int ppp_unit_number(struct ppp_channel *chan)
        struct channel *pch = chan->ppp;
        int unit = -1;
 
-       if (pch != 0) {
+       if (pch) {
                read_lock_bh(&pch->upl);
-               if (pch->ppp != 0)
+               if (pch->ppp)
                        unit = pch->ppp->file.index;
                read_unlock_bh(&pch->upl);
        }
@@ -2061,7 +2061,7 @@ ppp_unregister_channel(struct ppp_channel *chan)
 {
        struct channel *pch = chan->ppp;
 
-       if (pch == 0)
+       if (!pch)
                return;         /* should never happen */
        chan->ppp = NULL;
 
@@ -2093,7 +2093,7 @@ ppp_output_wakeup(struct ppp_channel *chan)
 {
        struct channel *pch = chan->ppp;
 
-       if (pch == 0)
+       if (!pch)
                return;
        ppp_channel_push(pch);
 }
@@ -2124,18 +2124,18 @@ ppp_set_compress(struct ppp *ppp, unsigned long arg)
 
        cp = find_compressor(ccp_option[0]);
 #ifdef CONFIG_KMOD
-       if (cp == 0) {
+       if (!cp) {
                request_module("ppp-compress-%d", ccp_option[0]);
                cp = find_compressor(ccp_option[0]);
        }
 #endif /* CONFIG_KMOD */
-       if (cp == 0)
+       if (!cp)
                goto out;
 
        err = -ENOBUFS;
        if (data.transmit) {
                state = cp->comp_alloc(ccp_option, data.length);
-               if (state != 0) {
+               if (state) {
                        ppp_xmit_lock(ppp);
                        ppp->xstate &= ~SC_COMP_RUN;
                        ocomp = ppp->xcomp;
@@ -2143,7 +2143,7 @@ ppp_set_compress(struct ppp *ppp, unsigned long arg)
                        ppp->xcomp = cp;
                        ppp->xc_state = state;
                        ppp_xmit_unlock(ppp);
-                       if (ostate != 0) {
+                       if (ostate) {
                                ocomp->comp_free(ostate);
                                module_put(ocomp->owner);
                        }
@@ -2153,7 +2153,7 @@ ppp_set_compress(struct ppp *ppp, unsigned long arg)
 
        } else {
                state = cp->decomp_alloc(ccp_option, data.length);
-               if (state != 0) {
+               if (state) {
                        ppp_recv_lock(ppp);
                        ppp->rstate &= ~SC_DECOMP_RUN;
                        ocomp = ppp->rcomp;
@@ -2161,7 +2161,7 @@ ppp_set_compress(struct ppp *ppp, unsigned long arg)
                        ppp->rcomp = cp;
                        ppp->rc_state = state;
                        ppp_recv_unlock(ppp);
-                       if (ostate != 0) {
+                       if (ostate) {
                                ocomp->decomp_free(ostate);
                                module_put(ocomp->owner);
                        }
@@ -2228,7 +2228,7 @@ ppp_ccp_peek(struct ppp *ppp, struct sk_buff *skb, int 
inbound)
                        break;
                if (inbound) {
                        /* we will start receiving compressed packets */
-                       if (ppp->rc_state == 0)
+                       if (!ppp->rc_state)
                                break;
                        if (ppp->rcomp->decomp_init(ppp->rc_state, dp, len,
                                        ppp->file.index, 0, ppp->mru, 
ppp->debug)) {
@@ -2237,7 +2237,7 @@ ppp_ccp_peek(struct ppp *ppp, struct sk_buff *skb, int 
inbound)
                        }
                } else {
                        /* we will soon start sending compressed packets */
-                       if (ppp->xc_state == 0)
+                       if (!ppp->xc_state)
                                break;
                        if (ppp->xcomp->comp_init(ppp->xc_state, dp, len,
                                        ppp->file.index, 0, ppp->debug))
@@ -2320,11 +2320,11 @@ ppp_register_compressor(struct compressor *cp)
        int ret;
        spin_lock(&compressor_list_lock);
        ret = -EEXIST;
-       if (find_comp_entry(cp->compress_proto) != 0)
+       if (find_comp_entry(cp->compress_proto))
                goto out;
        ret = -ENOMEM;
        ce = kmalloc(sizeof(struct compressor_entry), GFP_ATOMIC);
-       if (ce == 0)
+       if (!ce)
                goto out;
        ret = 0;
        ce->comp = cp;
@@ -2342,7 +2342,7 @@ ppp_unregister_compressor(struct compressor *cp)
 
        spin_lock(&compressor_list_lock);
        ce = find_comp_entry(cp->compress_proto);
-       if (ce != 0 && ce->comp == cp) {
+       if (ce && ce->comp == cp) {
                list_del(&ce->list);
                kfree(ce);
        }
@@ -2358,7 +2358,7 @@ find_compressor(int type)
 
        spin_lock(&compressor_list_lock);
        ce = find_comp_entry(type);
-       if (ce != 0) {
+       if (ce) {
                cp = ce->comp;
                if (!try_module_get(cp->owner))
                        cp = NULL;
@@ -2383,7 +2383,7 @@ ppp_get_stats(struct ppp *ppp, struct ppp_stats *st)
        st->p.ppp_opackets = ppp->stats.tx_packets;
        st->p.ppp_oerrors = ppp->stats.tx_errors;
        st->p.ppp_obytes = ppp->stats.tx_bytes;
-       if (vj == 0)
+       if (!vj)
                return;
        st->vj.vjs_packets = vj->sls_o_compressed + vj->sls_o_uncompressed;
        st->vj.vjs_compressed = vj->sls_o_compressed;
@@ -2604,11 +2604,11 @@ ppp_connect_channel(struct channel *pch, int unit)
 
        mutex_lock(&all_ppp_mutex);
        ppp = ppp_find_unit(unit);
-       if (ppp == 0)
+       if (!ppp)
                goto out;
        write_lock_bh(&pch->upl);
        ret = -EINVAL;
-       if (pch->ppp != 0)
+       if (pch->ppp)
                goto outl;
 
        ppp_lock(ppp);
@@ -2644,7 +2644,7 @@ ppp_disconnect_channel(struct channel *pch)
        ppp = pch->ppp;
        pch->ppp = NULL;
        write_unlock_bh(&pch->upl);
-       if (ppp != 0) {
+       if (ppp) {
                /* remove it from the ppp unit's list */
                ppp_lock(ppp);
                list_del(&pch->clist);
diff --git a/drivers/net/ppp_synctty.c b/drivers/net/ppp_synctty.c
index 00e2fb4..f0c6a19 100644
--- a/drivers/net/ppp_synctty.c
+++ b/drivers/net/ppp_synctty.c
@@ -209,7 +209,7 @@ ppp_sync_open(struct tty_struct *tty)
 
        ap = kzalloc(sizeof(*ap), GFP_KERNEL);
        err = -ENOMEM;
-       if (ap == 0)
+       if (!ap)
                goto out;
 
        /* initialize the syncppp structure */
@@ -262,7 +262,7 @@ ppp_sync_close(struct tty_struct *tty)
        ap = tty->disc_data;
        tty->disc_data = NULL;
        write_unlock_irq(&disc_data_lock);
-       if (ap == 0)
+       if (!ap)
                return;
 
        /*
@@ -278,7 +278,7 @@ ppp_sync_close(struct tty_struct *tty)
 
        ppp_unregister_channel(&ap->chan);
        skb_queue_purge(&ap->rqueue);
-       if (ap->tpkt != 0)
+       if (ap->tpkt)
                kfree_skb(ap->tpkt);
        kfree(ap);
 }
@@ -325,13 +325,13 @@ ppp_synctty_ioctl(struct tty_struct *tty, struct file 
*file,
        int __user *p = (int __user *)arg;
        int err, val;
 
-       if (ap == 0)
+       if (!ap)
                return -ENXIO;
        err = -EFAULT;
        switch (cmd) {
        case PPPIOCGCHAN:
                err = -ENXIO;
-               if (ap == 0)
+               if (!ap)
                        break;
                err = -EFAULT;
                if (put_user(ppp_channel_index(&ap->chan), p))
@@ -341,7 +341,7 @@ ppp_synctty_ioctl(struct tty_struct *tty, struct file *file,
 
        case PPPIOCGUNIT:
                err = -ENXIO;
-               if (ap == 0)
+               if (!ap)
                        break;
                err = -EFAULT;
                if (put_user(ppp_unit_number(&ap->chan), p))
@@ -390,7 +390,7 @@ ppp_sync_receive(struct tty_struct *tty, const unsigned 
char *buf,
        struct syncppp *ap = sp_get(tty);
        unsigned long flags;
 
-       if (ap == 0)
+       if (!ap)
                return;
        spin_lock_irqsave(&ap->recv_lock, flags);
        ppp_sync_input(ap, buf, cflags, count);
@@ -409,7 +409,7 @@ ppp_sync_wakeup(struct tty_struct *tty)
        struct syncppp *ap = sp_get(tty);
 
        clear_bit(TTY_DO_WRITE_WAKEUP, &tty->flags);
-       if (ap == 0)
+       if (!ap)
                return;
        set_bit(XMIT_WAKEUP, &ap->xmit_flags);
        tasklet_schedule(&ap->tsk);
@@ -651,7 +651,7 @@ ppp_sync_push(struct syncppp *ap)
        for (;;) {
                if (test_and_clear_bit(XMIT_WAKEUP, &ap->xmit_flags))
                        tty_stuffed = 0;
-               if (!tty_stuffed && ap->tpkt != 0) {
+               if (!tty_stuffed && ap->tpkt) {
                        set_bit(TTY_DO_WRITE_WAKEUP, &tty->flags);
                        sent = tty->driver->write(tty, ap->tpkt->data, 
ap->tpkt->len);
                        if (sent < 0)
@@ -669,7 +669,7 @@ ppp_sync_push(struct syncppp *ap)
                /* haven't made any progress */
                spin_unlock_bh(&ap->xmit_lock);
                if (!(test_bit(XMIT_WAKEUP, &ap->xmit_flags)
-                     || (!tty_stuffed && ap->tpkt != 0)))
+                     || (!tty_stuffed && ap->tpkt)))
                        break;
                if (!spin_trylock_bh(&ap->xmit_lock))
                        break;
@@ -677,7 +677,7 @@ ppp_sync_push(struct syncppp *ap)
        return done;
 
 flush:
-       if (ap->tpkt != 0) {
+       if (ap->tpkt) {
                kfree_skb(ap->tpkt);
                ap->tpkt = NULL;
                clear_bit(XMIT_FULL, &ap->xmit_flags);
@@ -732,7 +732,8 @@ ppp_sync_input(struct syncppp *ap, const unsigned char *buf,
                ppp_print_buffer ("receive buffer", buf, count);
 
        /* stuff the chars in the skb */
-       if ((skb = dev_alloc_skb(ap->mru + PPP_HDRLEN + 2)) == 0) {
+       skb = dev_alloc_skb(ap->mru + PPP_HDRLEN + 2);
+       if (!skb) {
                printk(KERN_ERR "PPPsync: no memory (input pkt)\n");
                goto err;
        }
@@ -740,7 +741,7 @@ ppp_sync_input(struct syncppp *ap, const unsigned char *buf,
        if (buf[0] != PPP_ALLSTATIONS)
                skb_reserve(skb, 2 + (buf[0] & 1));
 
-       if (flags != 0 && *flags) {
+       if (flags && *flags) {
                /* error flag set, ignore frame */
                goto err;
        } else if (count > skb_tailroom(skb)) {
-
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