linux-kernel - [PATCH 52/58] [GFS2] Remove unneeded i

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Date:	Mon, 21 Jan 2008 09:22:10 +0000
From:	swhiteho@...hat.com
To:	linux-kernel@...r.kernel.org, cluster-devel@...hat.com
Cc:	Bob Peterson <rpeterso@...hat.com>,
	Steven Whitehouse <swhiteho@...hat.com>
Subject: [PATCH 52/58] [GFS2] Remove unneeded i_spin

From: Bob Peterson <rpeterso@...hat.com>

This patch removes a vestigial variable "i_spin" from the gfs2_inode
structure.  This not only saves us memory (>300000 of these in memory
for the oom test) it also saves us time because we don't have to
spend time initializing it (i.e. slightly better performance).

Signed-off-by: Bob Peterson <rpeterso@...hat.com>
Signed-off-by: Steven Whitehouse <swhiteho@...hat.com>

diff --git a/fs/gfs2/incore.h b/fs/gfs2/incore.h
index bd92a6d..1339996 100644
--- a/fs/gfs2/incore.h
+++ b/fs/gfs2/incore.h
@@ -267,7 +267,6 @@ struct gfs2_inode {
 	struct gfs2_alloc *i_alloc;
 	u64 i_last_rg_alloc;
 
-	spinlock_t i_spin;
 	struct rw_semaphore i_rw_mutex;
 };
 
diff --git a/fs/gfs2/main.c b/fs/gfs2/main.c
index 88686fc..9c7765c 100644
--- a/fs/gfs2/main.c
+++ b/fs/gfs2/main.c
@@ -29,7 +29,6 @@ static void gfs2_init_inode_once(struct kmem_cache *cachep, void *foo)
 	struct gfs2_inode *ip = foo;
 
 	inode_init_once(&ip->i_inode);
-	spin_lock_init(&ip->i_spin);
 	init_rwsem(&ip->i_rw_mutex);
 	ip->i_alloc = NULL;
 }
-- 
1.5.1.2

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