5045 use atomic_{inc,dec}_* instead of atomic_add_*

*** 98,115 ****
   * Release a reference on ip_xmit_attr.
   * The reference is acquired by conn_get_ixa()
   */
  #define IXA_REFRELE(ixa)                                        \
  {                                                               \
!         if (atomic_add_32_nv(&(ixa)->ixa_refcnt, -1) == 0)      \
                  ixa_inactive(ixa);                              \
  }
  
  #define IXA_REFHOLD(ixa)                                        \
  {                                                               \
          ASSERT((ixa)->ixa_refcnt != 0);                         \
!         atomic_add_32(&(ixa)->ixa_refcnt, 1);                   \
  }
  
  /*
   * When we need to handle a transmit side asynchronous operation, then we need
   * to save sufficient information so that we can call the fragment and postfrag
--- 98,115 ----
   * Release a reference on ip_xmit_attr.
   * The reference is acquired by conn_get_ixa()
   */
  #define IXA_REFRELE(ixa)                                        \
  {                                                               \
!         if (atomic_dec_32_nv(&(ixa)->ixa_refcnt) == 0)  \
                  ixa_inactive(ixa);                              \
  }
  
  #define IXA_REFHOLD(ixa)                                        \
  {                                                               \
          ASSERT((ixa)->ixa_refcnt != 0);                         \
!         atomic_inc_32(&(ixa)->ixa_refcnt);                      \
  }
  
  /*
   * When we need to handle a transmit side asynchronous operation, then we need
   * to save sufficient information so that we can call the fragment and postfrag
*** 752,762 ****
          mutex_enter(&connp->conn_lock);
          ixa = connp->conn_ixa;
  
          /* At least one references for the conn_t */
          ASSERT(ixa->ixa_refcnt >= 1);
!         if (atomic_add_32_nv(&ixa->ixa_refcnt, 1) == 2) {
                  /* No other thread using conn_ixa */
                  mutex_exit(&connp->conn_lock);
                  return (ixa);
          }
          ixa = kmem_alloc(sizeof (*ixa), kmflag);
--- 752,762 ----
          mutex_enter(&connp->conn_lock);
          ixa = connp->conn_ixa;
  
          /* At least one references for the conn_t */
          ASSERT(ixa->ixa_refcnt >= 1);
!         if (atomic_inc_32_nv(&ixa->ixa_refcnt) == 2) {
                  /* No other thread using conn_ixa */
                  mutex_exit(&connp->conn_lock);
                  return (ixa);
          }
          ixa = kmem_alloc(sizeof (*ixa), kmflag);
*** 854,864 ****
  
          /* At least one references for the conn_t */
          ASSERT(ixa->ixa_refcnt >= 1);
  
          /* Make sure conn_ixa doesn't disappear while we copy it */
!         atomic_add_32(&ixa->ixa_refcnt, 1);
  
          ixa = kmem_alloc(sizeof (*ixa), KM_NOSLEEP);
          if (ixa == NULL) {
                  mutex_exit(&connp->conn_lock);
                  ixa_refrele(connp->conn_ixa);
--- 854,864 ----
  
          /* At least one references for the conn_t */
          ASSERT(ixa->ixa_refcnt >= 1);
  
          /* Make sure conn_ixa doesn't disappear while we copy it */
!         atomic_inc_32(&ixa->ixa_refcnt);
  
          ixa = kmem_alloc(sizeof (*ixa), KM_NOSLEEP);
          if (ixa == NULL) {
                  mutex_exit(&connp->conn_lock);
                  ixa_refrele(connp->conn_ixa);