linux-kernel - [PATCH v2] NFSd: simplify locking in nfsd_recall

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Message-ID: <20120703130215.4035.8190.stgit@localhost.localdomain>
Date:	Tue, 03 Jul 2012 17:02:24 +0400
From:	Stanislav Kinsbursky <skinsbursky@...allels.com>
To:	bfields@...ldses.org
Cc:	linux-nfs@...r.kernel.org, linux-kernel@...r.kernel.org,
	devel@...nvz.org
Subject: [PATCH v2] NFSd: simplify locking in nfsd_recall_delegations()

v2: rebased on 3.5-rc3 kernel

Holding of client_mutex looks redundant here - recall_lock looks enough.

Signed-off-by: Stanislav Kinsbursky <skinsbursky@...allels.com>
---
 fs/nfsd/nfs4state.c |    2 --
 1 files changed, 0 insertions(+), 2 deletions(-)

diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c
index 33eccee..480ecc9 100644
--- a/fs/nfsd/nfs4state.c
+++ b/fs/nfsd/nfs4state.c
@@ -4622,7 +4622,6 @@ void nfsd_recall_delegations(u64 num)
 	LIST_HEAD(victims);
 	struct nfs4_delegation *dp, *dnext;
 
-	nfs4_lock_state();
 	spin_lock(&recall_lock);
 	count = nfsd_process_n_delegations(num, &victims);
 	list_for_each_entry_safe(dp, dnext, &victims, dl_recall_lru) {
@@ -4630,7 +4629,6 @@ void nfsd_recall_delegations(u64 num)
 		nfsd_break_one_deleg(dp);
 	}
 	spin_unlock(&recall_lock);
-	nfs4_unlock_state();
 
 	printk(KERN_INFO "NFSD: Recalled %d delegations", count);
 }

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