path: root/drivers/net/hamradio/Kconfig
diff options
authorRalf Baechle <ralf@linux-mips.org>2005-10-17 12:42:32 +0100
committerJeff Garzik <jgarzik@pobox.com>2005-10-18 17:01:27 -0400
commitbc0a7438605c5e0cafdb32a3caf46254e146b116 (patch)
tree7331f97459c13f1f4bb18d8d2db6abd724ad6f7f /drivers/net/hamradio/Kconfig
parent[PATCH] S2io: Offline diagnostics fixes (diff)
[PATCH] rcu in bpqether driver.
From Suzanne Wood <suzannew@cs.pdx.edu>: Clarify RCU implementation in bpqether.c. Because bpq_new_device() calls list_add_rcu() and bpq_free_device() calls list_del_rcu(), substitute list_for_each_entry_rcu() for list_for_each_entry() in bpq_get_ax25_dev() and in bpq_seq_start(). Add rcu dereference protection in bpq_seq_next(). The rcu_read_lock()/unlock() in bpq_device_event() are removed because netdev event handlers are called with RTNL locking in place. FYI: bpq_free_device() calls list_del_rcu() which, per list.h, requires synchronize_rcu() which can block or call_rcu() or call_rcu_bh() which cannot block. Herbert Xu notes that synchronization is done here by unregister_netdevice(). This calls synchronize_net() which in turn uses synchronize_rcu(). Signed-off-by: Ralf Baechle DL5RB <ralf@linux-mips.org> Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
Diffstat (limited to 'drivers/net/hamradio/Kconfig')
0 files changed, 0 insertions, 0 deletions