The first patch fixes a bug with locking as reported by Li Lingfeng: some write_foo functions aren't locked properly. The other two improve the locking code, particulary so that we don't need a global mutex to change per-netns data. A final patch revises the locking to use guard(mutex) for all places that the ->config_mutex is used. I think this is an improvement but would like to know what others think. I've put the gobal cleanup code in the module exit function so that the locking is already managed. NeilBrown [PATCH 1/4] nfsd: provide proper locking for all write_ function [PATCH 2/4] nfsd: use mutex for global config management and clean up [PATCH 3/4] nfsd: split nfsd_mutex into one mutex per net-namespace. [PATCH 4/4] nfsd: use guard(mutex) for all ->config_mutex locking.
