[XFS] Unwrap XFS_DQ_PINUNLOCK.

Un-obfuscate DQ_PINLOCK, remove DQ_PINLOCK->mutex_lock->spin_lock macros,
call spin_lock directly, remove extraneous cookie holdover from old xfs
code, and change lock type to spinlock_t.

SGI-PV: 970382
SGI-Modid: xfs-linux-melb:xfs-kern:29742a

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/quota/xfs_dquot.h

@@ -123,11 +123,6 @@ XFS_DQ_IS_LOCKED(xfs_dquot_t *dqp)
 				   vsema(&((dqp)->q_flock)); \
 				   (dqp)->dq_flags &= ~(XFS_DQ_FLOCKED); }
 
-#define XFS_DQ_PINLOCK(dqp)	   mutex_spinlock( \
-				     &(XFS_DQ_TO_QINF(dqp)->qi_pinlock))
-#define XFS_DQ_PINUNLOCK(dqp, s)   mutex_spinunlock( \
-				     &(XFS_DQ_TO_QINF(dqp)->qi_pinlock), s)
-
 #define XFS_DQ_IS_FLUSH_LOCKED(dqp) (issemalocked(&((dqp)->q_flock)))
 #define XFS_DQ_IS_ON_FREELIST(dqp)  ((dqp)->dq_flnext != (dqp))
 #define XFS_DQ_IS_DIRTY(dqp)	((dqp)->dq_flags & XFS_DQ_DIRTY)

fs/xfs/quota/xfs_dquot_item.c

@@ -94,14 +94,13 @@ STATIC void
 xfs_qm_dquot_logitem_pin(
 	xfs_dq_logitem_t *logitem)
 {
-	unsigned long	s;
 	xfs_dquot_t *dqp;
 
 	dqp = logitem->qli_dquot;
 	ASSERT(XFS_DQ_IS_LOCKED(dqp));
-	s = XFS_DQ_PINLOCK(dqp);
+	spin_lock(&(XFS_DQ_TO_QINF(dqp)->qi_pinlock));
 	dqp->q_pincount++;
-	XFS_DQ_PINUNLOCK(dqp, s);
+	spin_unlock(&(XFS_DQ_TO_QINF(dqp)->qi_pinlock));
 }
 
 /*
@@ -115,17 +114,16 @@ xfs_qm_dquot_logitem_unpin(
 	xfs_dq_logitem_t *logitem,
 	int		  stale)
 {
-	unsigned long	s;
 	xfs_dquot_t *dqp;
 
 	dqp = logitem->qli_dquot;
 	ASSERT(dqp->q_pincount > 0);
-	s = XFS_DQ_PINLOCK(dqp);
+	spin_lock(&(XFS_DQ_TO_QINF(dqp)->qi_pinlock));
 	dqp->q_pincount--;
 	if (dqp->q_pincount == 0) {
 		sv_broadcast(&dqp->q_pinwait);
 	}
-	XFS_DQ_PINUNLOCK(dqp, s);
+	spin_unlock(&(XFS_DQ_TO_QINF(dqp)->qi_pinlock));
 }
 
 /* ARGSUSED */
@@ -189,8 +187,6 @@ void
 xfs_qm_dqunpin_wait(
 	xfs_dquot_t	*dqp)
 {
-	SPLDECL(s);
-
 	ASSERT(XFS_DQ_IS_LOCKED(dqp));
 	if (dqp->q_pincount == 0) {
 		return;
@@ -200,9 +196,9 @@ xfs_qm_dqunpin_wait(
 	 * Give the log a push so we don't wait here too long.
 	 */
 	xfs_log_force(dqp->q_mount, (xfs_lsn_t)0, XFS_LOG_FORCE);
-	s = XFS_DQ_PINLOCK(dqp);
+	spin_lock(&(XFS_DQ_TO_QINF(dqp)->qi_pinlock));
 	if (dqp->q_pincount == 0) {
-		XFS_DQ_PINUNLOCK(dqp, s);
+		spin_unlock(&(XFS_DQ_TO_QINF(dqp)->qi_pinlock));
 		return;
 	}
 	sv_wait(&(dqp->q_pinwait), PINOD,

fs/xfs/quota/xfs_qm.h

@@ -106,7 +106,7 @@ typedef struct xfs_qm {
 typedef struct xfs_quotainfo {
 	xfs_inode_t	*qi_uquotaip;	 /* user quota inode */
 	xfs_inode_t	*qi_gquotaip;	 /* group quota inode */
-	lock_t		 qi_pinlock;	 /* dquot pinning mutex */
+	spinlock_t	 qi_pinlock;	 /* dquot pinning lock */
 	xfs_dqlist_t	 qi_dqlist;	 /* all dquots in filesys */
 	int		 qi_dqreclaims;	 /* a change here indicates
 					    a removal in the dqlist */