[PATCH] lockdep: annotate qeth driver

Annotate the qeth driver which uses a private skb-queue-head that is safely
used in hardirq context too.

Has no effect on non-lockdep kernels.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Acked-by: Ingo Molnar <mingo@elte.hu>
Cc: Jeff Garzik <jeff@garzik.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

diff --git a/drivers/s390/net/qeth_main.c b/drivers/s390/net/qeth_main.c
index 36733b9823c620d93ed456181cb7ea817ab66f23..8e8963f1573173a41fb8995dd3d9866605fdc714 100644 (file)
--- a/drivers/s390/net/qeth_main.c
+++ b/drivers/s390/net/qeth_main.c
@@ -84,6 +84,8 @@ static debug_info_t *qeth_dbf_qerr = NULL;
 
 DEFINE_PER_CPU(char[256], qeth_dbf_txt_buf);
 
+static struct lock_class_key qdio_out_skb_queue_key;
+
 /**
  * some more definitions and declarations
  */
@@ -3229,6 +3231,9 @@ qeth_alloc_qdio_buffers(struct qeth_card *card)
                                &card->qdio.out_qs[i]->qdio_bufs[j];
                        skb_queue_head_init(&card->qdio.out_qs[i]->bufs[j].
                                            skb_list);
+                       lockdep_set_class(
+                               &card->qdio.out_qs[i]->bufs[j].skb_list.lock,
+                               &qdio_out_skb_queue_key);
                        INIT_LIST_HEAD(&card->qdio.out_qs[i]->bufs[j].ctx_list);
                }
        }
@@ -5272,6 +5277,7 @@ qeth_free_vlan_buffer(struct qeth_card *card, struct qeth_qdio_out_buffer *buf,
        struct sk_buff_head tmp_list;
 
        skb_queue_head_init(&tmp_list);
+       lockdep_set_class(&tmp_list.lock, &qdio_out_skb_queue_key);
        for(i = 0; i < QETH_MAX_BUFFER_ELEMENTS(card); ++i){
                while ((skb = skb_dequeue(&buf->skb_list))){
                        if (vlan_tx_tag_present(skb) &&