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

*** 1029,1039 **** * atomic decrement the reference count to prevent * the race condition with the interrupt thread that * is processing a loaned up buffer block. */ free_state = rx_msg_p->free; ! ref_cnt = atomic_add_32_nv(&rx_msg_p->ref_cnt, -1); if (!ref_cnt) { atomic_dec_32(&hxge_mblks_pending); buffer = rx_msg_p->buffer; size = rx_msg_p->block_size; --- 1029,1039 ---- * atomic decrement the reference count to prevent * the race condition with the interrupt thread that * is processing a loaned up buffer block. */ free_state = rx_msg_p->free; ! ref_cnt = atomic_dec_32_nv(&rx_msg_p->ref_cnt); if (!ref_cnt) { atomic_dec_32(&hxge_mblks_pending); buffer = rx_msg_p->buffer; size = rx_msg_p->block_size;