drivers/md/raid10.c:889:17: warning: Using plain integer as NULL pointer
drivers/media/video/cx18/cx18-driver.c:616:12: warning: Using plain integer as NULL pointer
sound/oss/kahlua.c:70:12: warning: Using plain integer as NULL pointer
Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com>
Cc: Neil Brown <neilb@suse.de>
Cc: Mauro Carvalho Chehab <mchehab@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
         */
        raid10_find_phys(conf, r10_bio);
  retry_write:
-       blocked_rdev = 0;
+       blocked_rdev = NULL;
        rcu_read_lock();
        for (i = 0;  i < conf->copies; i++) {
                int d = r10_bio->devs[i].devnum;
 
        }
 
        cx = kzalloc(sizeof(struct cx18), GFP_ATOMIC);
-       if (cx == 0) {
+       if (!cx) {
                spin_unlock(&cx18_cards_lock);
                return -ENOMEM;
        }
 
                return 1;
        
        mem = ioremap(base, 128);
-       if(mem == 0UL)
+       if (!mem)
                return 1;
        map = readw(mem + 0x18);        /* Read the SMI enables */
        iounmap(mem);