From c47e9b918844ab7bb139eada7b085c576ddf0afb Mon Sep 17 00:00:00 2001 From: Allan Stephens Date: Mon, 24 Oct 2011 10:29:26 -0400 Subject: tipc: Eliminate dynamic allocation of broadcast link data structures Creates global variables to hold the broadcast link's pseudo-bearer and pseudo-link structures, rather than allocating them dynamically. There is only a single instance of each structure, and changing over to static allocation allows elimination of code to handle the cases where dynamic allocation was unsuccessful. The memset in the teardown code may look like they aren't used, but the same teardown code is run when there is a non-fatal error at init-time, so that stale data isn't present when the user fixes the cause of the soft error. Signed-off-by: Allan Stephens Signed-off-by: Paul Gortmaker --- net/tipc/bcast.c | 37 +++++++++++-------------------------- net/tipc/bcast.h | 2 +- net/tipc/net.c | 5 +---- 3 files changed, 13 insertions(+), 31 deletions(-) (limited to 'net/tipc') diff --git a/net/tipc/bcast.c b/net/tipc/bcast.c index 28908f54459..738cb642d31 100644 --- a/net/tipc/bcast.c +++ b/net/tipc/bcast.c @@ -98,10 +98,13 @@ struct bclink { struct tipc_node *retransmit_to; }; +static struct bcbearer bcast_bearer; +static struct bclink bcast_link; + +static struct bcbearer *bcbearer = &bcast_bearer; +static struct bclink *bclink = &bcast_link; +static struct link *bcl = &bcast_link.link; -static struct bcbearer *bcbearer; -static struct bclink *bclink; -static struct link *bcl; static DEFINE_SPINLOCK(bc_lock); /* broadcast-capable node map */ @@ -752,25 +755,13 @@ int tipc_bclink_set_queue_limits(u32 limit) return 0; } -int tipc_bclink_init(void) +void tipc_bclink_init(void) { - bcbearer = kzalloc(sizeof(*bcbearer), GFP_ATOMIC); - bclink = kzalloc(sizeof(*bclink), GFP_ATOMIC); - if (!bcbearer || !bclink) { - warn("Broadcast link creation failed, no memory\n"); - kfree(bcbearer); - bcbearer = NULL; - kfree(bclink); - bclink = NULL; - return -ENOMEM; - } - INIT_LIST_HEAD(&bcbearer->bearer.cong_links); bcbearer->bearer.media = &bcbearer->media; bcbearer->media.send_msg = tipc_bcbearer_send; sprintf(bcbearer->media.name, "tipc-broadcast"); - bcl = &bclink->link; INIT_LIST_HEAD(&bcl->waiting_ports); bcl->next_out_no = 1; spin_lock_init(&bclink->node.lock); @@ -780,22 +771,16 @@ int tipc_bclink_init(void) bcl->b_ptr = &bcbearer->bearer; bcl->state = WORKING_WORKING; strlcpy(bcl->name, tipc_bclink_name, TIPC_MAX_LINK_NAME); - - return 0; } void tipc_bclink_stop(void) { spin_lock_bh(&bc_lock); - if (bcbearer) { - tipc_link_stop(bcl); - bcl = NULL; - kfree(bclink); - bclink = NULL; - kfree(bcbearer); - bcbearer = NULL; - } + tipc_link_stop(bcl); spin_unlock_bh(&bc_lock); + + memset(bclink, 0, sizeof(*bclink)); + memset(bcbearer, 0, sizeof(*bcbearer)); } diff --git a/net/tipc/bcast.h b/net/tipc/bcast.h index 06740da5ae6..0b0444363b4 100644 --- a/net/tipc/bcast.h +++ b/net/tipc/bcast.h @@ -88,7 +88,7 @@ static inline int tipc_nmap_equal(struct tipc_node_map *nm_a, struct tipc_node_m void tipc_port_list_add(struct port_list *pl_ptr, u32 port); void tipc_port_list_free(struct port_list *pl_ptr); -int tipc_bclink_init(void); +void tipc_bclink_init(void); void tipc_bclink_stop(void); struct tipc_node *tipc_bclink_retransmit_to(void); void tipc_bclink_acknowledge(struct tipc_node *n_ptr, u32 acked); diff --git a/net/tipc/net.c b/net/tipc/net.c index e13162fc61c..61afee7e829 100644 --- a/net/tipc/net.c +++ b/net/tipc/net.c @@ -174,7 +174,6 @@ void tipc_net_route_msg(struct sk_buff *buf) int tipc_net_start(u32 addr) { char addr_string[16]; - int res; if (tipc_mode != TIPC_NODE_MODE) return -ENOPROTOOPT; @@ -187,9 +186,7 @@ int tipc_net_start(u32 addr) tipc_named_reinit(); tipc_port_reinit(); - res = tipc_bclink_init(); - if (res) - return res; + tipc_bclink_init(); tipc_k_signal((Handler)tipc_subscr_start, 0); tipc_k_signal((Handler)tipc_cfg_init, 0); -- cgit v1.2.3-70-g09d2