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authorNeilBrown <neilb@suse.de>2014-08-04 10:24:00 +0400
committerTrond Myklebust <trond.myklebust@primarydata.com>2014-08-04 17:22:08 +0400
commit122a8cda6a9a3594c4737570f5cd81636bcd20cf (patch)
tree75d8f337b22e59e70d31670a7ebdbd47a8c00412 /net/sunrpc
parent50d77739fa1972030daf1c8902404551e49bf232 (diff)
downloadlinux-122a8cda6a9a3594c4737570f5cd81636bcd20cf.tar.xz
SUNRPC: remove all refcounting of groupinfo from rpcauth_lookupcred
current_cred() can only be changed by 'current', and cred->group_info is never changed. If a new group_info is needed, a new 'cred' is created. Consequently it is always safe to access current_cred()->group_info without taking any further references. So drop the refcounting and the incorrect rcu_dereference(). Signed-off-by: NeilBrown <neilb@suse.de> Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Diffstat (limited to 'net/sunrpc')
-rw-r--r--net/sunrpc/auth.c8
1 files changed, 1 insertions, 7 deletions
diff --git a/net/sunrpc/auth.c b/net/sunrpc/auth.c
index 24fcbd23ae6c..383eb919ac0b 100644
--- a/net/sunrpc/auth.c
+++ b/net/sunrpc/auth.c
@@ -630,14 +630,8 @@ rpcauth_lookupcred(struct rpc_auth *auth, int flags)
memset(&acred, 0, sizeof(acred));
acred.uid = cred->fsuid;
acred.gid = cred->fsgid;
- if (flags & RPCAUTH_LOOKUP_RCU)
- acred.group_info = rcu_dereference(cred->group_info);
- else
- acred.group_info = get_group_info(((struct cred *)cred)->group_info);
-
+ acred.group_info = cred->group_info;
ret = auth->au_ops->lookup_cred(auth, &acred, flags);
- if (!(flags & RPCAUTH_LOOKUP_RCU))
- put_group_info(acred.group_info);
return ret;
}
EXPORT_SYMBOL_GPL(rpcauth_lookupcred);