From: Benny Halevy <bhalevy@tonian.com>
Date: Fri, 24 Feb 2012 01:40:52 +0000 (-0800)
Subject: nfsd41: free_session/free_client must be called under the client_lock
X-Git-Tag: v3.4-rc1~40^2~21
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=508dc6e110c6dbdc0bbe84298ccfe22de7538486;p=pandora-kernel.git

nfsd41: free_session/free_client must be called under the client_lock

The session client is manipulated under the client_lock hence
both free_session and nfsd4_del_conns must be called under this lock.

This patch adds a BUG_ON that checks this condition in the
respective functions and implements the missing locks.

nfsd4_{get,put}_session helpers were moved to the C file that uses them
so to prevent use from external files and an unlocked version of
nfsd4_put_session is provided for external use from nfs4xdr.c

Signed-off-by: Benny Halevy <bhalevy@tonian.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
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