From: Allan Stephens Date: Tue, 18 Oct 2011 18:47:02 +0000 (-0400) Subject: tipc: Revise comment justifying release of configuration spinlock X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=bfec73d7e45cdf570d649a547050295789e1e6fb;p=linux-beck.git tipc: Revise comment justifying release of configuration spinlock Comment-only change to better explain why TIPC's configuration lock is temporarily released while activating support for network interfaces, and why the existing activation code doesn't require rework. Signed-off-by: Allan Stephens Signed-off-by: Paul Gortmaker --- diff --git a/net/tipc/config.c b/net/tipc/config.c index b25a396b7e1e..4785bf26cdf4 100644 --- a/net/tipc/config.c +++ b/net/tipc/config.c @@ -184,13 +184,12 @@ static struct sk_buff *cfg_set_own_addr(void) " (cannot change node address once assigned)"); /* - * Must release all spinlocks before calling start_net() because - * Linux version of TIPC calls eth_media_start() which calls - * register_netdevice_notifier() which may block! - * - * Temporarily releasing the lock should be harmless for non-Linux TIPC, - * but Linux version of eth_media_start() should really be reworked - * so that it can be called with spinlocks held. + * Must temporarily release configuration spinlock while switching into + * networking mode as it calls tipc_eth_media_start(), which may sleep. + * Releasing the lock is harmless as other locally-issued configuration + * commands won't occur until this one completes, and remotely-issued + * configuration commands can't be received until a local configuration + * command to enable the first bearer is received and processed. */ spin_unlock_bh(&config_lock);