The following commit has been merged in the master branch: commit 7d256a1ff01e698d544c98847affd604128024fb Author: Antonio Quartulli ordex@autistici.org Date: Sat Apr 14 13:15:26 2012 +0200
batman-adv: convert bat_priv->tt_crc from atomic_t to uint16_t
In the code we neever need to atomically check and set the bat_priv->tt_crc field value. It is simply set and read once in different pieces of the code. Therefore this field can be safely be converted from atomic_t to uint16_t.
Reported-by: Al Viro viro@ZenIV.linux.org.uk Signed-off-by: Antonio Quartulli ordex@autistici.org
diff --git a/bat_iv_ogm.c b/bat_iv_ogm.c index 994369d..ed743a4 100644 --- a/bat_iv_ogm.c +++ b/bat_iv_ogm.c @@ -576,8 +576,7 @@ static void bat_iv_ogm_schedule(struct hard_iface *hard_iface, htonl((uint32_t)atomic_read(&hard_iface->seqno));
batman_ogm_packet->ttvn = atomic_read(&bat_priv->ttvn); - batman_ogm_packet->tt_crc = htons((uint16_t) - atomic_read(&bat_priv->tt_crc)); + batman_ogm_packet->tt_crc = htons(bat_priv->tt_crc); if (tt_num_changes >= 0) batman_ogm_packet->tt_num_changes = tt_num_changes;
diff --git a/send.c b/send.c index 815cc9c..cebc14a 100644 --- a/send.c +++ b/send.c @@ -112,7 +112,7 @@ static int prepare_packet_buffer(struct bat_priv *bat_priv,
realloc_packet_buffer(hard_iface, new_len);
- atomic_set(&bat_priv->tt_crc, tt_local_crc(bat_priv)); + bat_priv->tt_crc = tt_local_crc(bat_priv);
/* reset the sending counter */ atomic_set(&bat_priv->tt_ogm_append_cnt, TT_OGM_APPEND_MAX); diff --git a/types.h b/types.h index 15f538a..995e910 100644 --- a/types.h +++ b/types.h @@ -224,7 +224,7 @@ struct bat_priv { spinlock_t vis_list_lock; /* protects vis_info::recv_list */ atomic_t num_local_tt; /* Checksum of the local table, recomputed before sending a new OGM */ - atomic_t tt_crc; + uint16_t tt_crc; unsigned char *tt_buff; int16_t tt_buff_len; spinlock_t tt_buff_lock; /* protects tt_buff */