xfs: remove XFS_ILOCK_RT*

Now that we've centralized the realtime metadata locking routines, get
rid of the ILOCK subclasses since we now use explicit lockdep classes.

Signed-off-by: Darrick J. Wong <djwong@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>

Author: Darrick J. Wong

fs/xfs/xfs_inode.c

@@ -342,8 +342,7 @@ xfs_lock_inumorder(
 {
 	uint	class = 0;
 
-	ASSERT(!(lock_mode & (XFS_ILOCK_PARENT | XFS_ILOCK_RTBITMAP |
-			      XFS_ILOCK_RTSUM)));
+	ASSERT(!(lock_mode & XFS_ILOCK_PARENT));
 	ASSERT(xfs_lockdep_subclass_ok(subclass));
 
 	if (lock_mode & (XFS_IOLOCK_SHARED|XFS_IOLOCK_EXCL)) {

fs/xfs/xfs_inode.h

@@ -448,9 +448,8 @@ static inline bool xfs_inode_has_bigrtalloc(const struct xfs_inode *ip)
  * However, MAX_LOCKDEP_SUBCLASSES == 8, which means we are greatly
  * limited to the subclasses we can represent via nesting. We need at least
  * 5 inodes nest depth for the ILOCK through rename, and we also have to support
- * XFS_ILOCK_PARENT, which gives 6 subclasses. Then we have XFS_ILOCK_RTBITMAP
- * and XFS_ILOCK_RTSUM, which are another 2 unique subclasses, so that's all
- * 8 subclasses supported by lockdep.
+ * XFS_ILOCK_PARENT, which gives 6 subclasses.  That's 6 of the 8 subclasses
+ * supported by lockdep.
  *
  * This also means we have to number the sub-classes in the lowest bits of
  * the mask we keep, and we have to ensure we never exceed 3 bits of lockdep
@@ -476,8 +475,8 @@ static inline bool xfs_inode_has_bigrtalloc(const struct xfs_inode *ip)
  * ILOCK values
  * 0-4		subclass values
  * 5		PARENT subclass (not nestable)
- * 6		RTBITMAP subclass (not nestable)
- * 7		RTSUM subclass (not nestable)
+ * 6		unused
+ * 7		unused
  * 
  */
 #define XFS_IOLOCK_SHIFT		16
@@ -492,12 +491,8 @@ static inline bool xfs_inode_has_bigrtalloc(const struct xfs_inode *ip)
 #define XFS_ILOCK_SHIFT			24
 #define XFS_ILOCK_PARENT_VAL		5u
 #define XFS_ILOCK_MAX_SUBCLASS		(XFS_ILOCK_PARENT_VAL - 1)
-#define XFS_ILOCK_RTBITMAP_VAL		6u
-#define XFS_ILOCK_RTSUM_VAL		7u
 #define XFS_ILOCK_DEP_MASK		0xff000000u
 #define	XFS_ILOCK_PARENT		(XFS_ILOCK_PARENT_VAL << XFS_ILOCK_SHIFT)
-#define	XFS_ILOCK_RTBITMAP		(XFS_ILOCK_RTBITMAP_VAL << XFS_ILOCK_SHIFT)
-#define	XFS_ILOCK_RTSUM			(XFS_ILOCK_RTSUM_VAL << XFS_ILOCK_SHIFT)
 
 #define XFS_LOCK_SUBCLASS_MASK	(XFS_IOLOCK_DEP_MASK | \
 				 XFS_MMAPLOCK_DEP_MASK | \

fs/xfs/xfs_rtalloc.c

@@ -1189,12 +1189,11 @@ xfs_rtalloc_reinit_frextents(
 static inline int
 xfs_rtmount_iread_extents(
 	struct xfs_trans	*tp,
-	struct xfs_inode	*ip,
-	unsigned int		lock_class)
+	struct xfs_inode	*ip)
 {
 	int			error;
 
-	xfs_ilock(ip, XFS_ILOCK_EXCL | lock_class);
+	xfs_ilock(ip, XFS_ILOCK_EXCL);
 
 	error = xfs_iread_extents(tp, ip, XFS_DATA_FORK);
 	if (error)
@@ -1207,7 +1206,7 @@ xfs_rtmount_iread_extents(
 	}
 
 out_unlock:
-	xfs_iunlock(ip, XFS_ILOCK_EXCL | lock_class);
+	xfs_iunlock(ip, XFS_ILOCK_EXCL);
 	return error;
 }
 
@@ -1228,7 +1227,7 @@ xfs_rtmount_rtg(
 
 		if (rtg->rtg_inodes[i]) {
 			error = xfs_rtmount_iread_extents(tp,
-					rtg->rtg_inodes[i], 0);
+					rtg->rtg_inodes[i]);
 			if (error)
 				return error;
 		}