[XFS] Cleanup lock goop.

Switch last couple lock_t's to spinlock_t's. Remove now-unused
spinlock-related macros & types.

SGI-PV: 970382
SGI-Modid: xfs-linux-melb:xfs-kern:29748a
Signed-off-by: Eric Sandeen <sandeen@sandeen.net>
Signed-off-by: Donald Douwsma <donaldd@sgi.com>
Signed-off-by: Tim Shimmin <tes@sgi.com>

fs/xfs/linux-2.6/spin.h

@@ -21,25 +21,7 @@
 #include <linux/sched.h>	/* preempt needs this */
 #include <linux/spinlock.h>
 
-/*
- * Map lock_t from IRIX to Linux spinlocks.
- *
- * We do not make use of lock_t from interrupt context, so we do not
- * have to worry about disabling interrupts at all (unlike IRIX).
- */
-
-typedef spinlock_t lock_t;
-
-#define SPLDECL(s)			unsigned long s
-#ifndef DEFINE_SPINLOCK
-#define DEFINE_SPINLOCK(s)		spinlock_t s = SPIN_LOCK_UNLOCKED
-#endif
-
 #define spinlock_init(lock, name)	spin_lock_init(lock)
 #define	spinlock_destroy(lock)
-#define mutex_spinlock(lock)		({ spin_lock(lock); 0; })
-#define mutex_spinunlock(lock, s)	do { spin_unlock(lock); (void)s; } while (0)
-#define nested_spinlock(lock)		spin_lock(lock)
-#define nested_spinunlock(lock)		spin_unlock(lock)
 
 #endif /* __XFS_SUPPORT_SPIN_H__ */

fs/xfs/xfs_inode.h

@@ -181,7 +181,7 @@ typedef struct xfs_icluster {
 	xfs_daddr_t		icl_blkno;	/* starting block number of
 						 * the cluster */
 	struct xfs_buf		*icl_buf;	/* the inode buffer */
-	lock_t			icl_lock;	/* inode list lock */
+	spinlock_t		icl_lock;	/* inode list lock */
 } xfs_icluster_t;
 
 /*

fs/xfs/xfs_mount.h

@@ -236,7 +236,7 @@ typedef struct xfs_mount {
 	int			m_bsize;	/* fs logical block size */
 	xfs_agnumber_t		m_agfrotor;	/* last ag where space found */
 	xfs_agnumber_t		m_agirotor;	/* last ag dir inode alloced */
-	lock_t			m_agirotor_lock;/* .. and lock protecting it */
+	spinlock_t		m_agirotor_lock;/* .. and lock protecting it */
 	xfs_agnumber_t		m_maxagi;	/* highest inode alloc group */
 	struct xfs_inode	*m_inodes;	/* active inode list */
 	struct list_head	m_del_inodes;	/* inodes to reclaim */