10093 kmem_log_enter() dereferences pointer before NULL check

*** 1423,1437 ****
  
  static void *
  kmem_log_enter(kmem_log_header_t *lhp, void *data, size_t size)
  {
          void *logspace;
!         kmem_cpu_log_header_t *clhp = &lhp->lh_cpu[CPU->cpu_seqid];
  
          if (lhp == NULL || kmem_logging == 0 || panicstr)
                  return (NULL);
  
          mutex_enter(&clhp->clh_lock);
          clhp->clh_hits++;
          if (size > clhp->clh_avail) {
                  mutex_enter(&lhp->lh_lock);
                  lhp->lh_hits++;
--- 1423,1439 ----
  
  static void *
  kmem_log_enter(kmem_log_header_t *lhp, void *data, size_t size)
  {
          void *logspace;
!         kmem_cpu_log_header_t *clhp;
  
          if (lhp == NULL || kmem_logging == 0 || panicstr)
                  return (NULL);
  
+         clhp = &lhp->lh_cpu[CPU->cpu_seqid];
+ 
          mutex_enter(&clhp->clh_lock);
          clhp->clh_hits++;
          if (size > clhp->clh_avail) {
                  mutex_enter(&lhp->lh_lock);
                  lhp->lh_hits++;