[XFS] Enable XFS_VNODE_TRACE

SGI Modid: xfs-linux:xfs-kern:190725a
Signed-off-by: NEric Sandeen <sandeen@sgi.com>
Signed-off-by: NChristoph Hellwig <hch@sgi.com>
.

fs/xfs/Makefile

@@ -49,7 +49,7 @@ ifeq ($(CONFIG_XFS_TRACE),y)
 	EXTRA_CFLAGS += -DXFS_LOG_TRACE
 	EXTRA_CFLAGS += -DXFS_RW_TRACE
 	EXTRA_CFLAGS += -DPAGEBUF_TRACE
-	# EXTRA_CFLAGS += -DXFS_VNODE_TRACE
+	EXTRA_CFLAGS += -DXFS_VNODE_TRACE
 endif
 
 obj-$(CONFIG_XFS_FS)		+= xfs.o

fs/xfs/linux-2.6/xfs_vnode.h

@@ -86,10 +86,11 @@ typedef struct vnode {
 	vnumber_t	v_number;		/* in-core vnode number */
 	vn_bhv_head_t	v_bh;			/* behavior head */
 	spinlock_t	v_lock;			/* VN_LOCK/VN_UNLOCK */
-	struct inode	v_inode;		/* Linux inode */
 #ifdef XFS_VNODE_TRACE
 	struct ktrace	*v_trace;		/* trace header structure    */
 #endif
+	struct inode	v_inode;		/* Linux inode */
+	/* inode MUST be last */
 } vnode_t;
 
 #define v_fbhv			v_bh.bh_first	       /* first behavior */