[XFS] remove unused pagebuf flags

SGI-PV: 908809
SGI-Modid: xfs-linux:xfs-kern:198656a

Signed-off-by: Christoph Hellwig <hch@sgi.com>
Signed-off-by: Nathan Scott <nathans@sgi.com>

fs/xfs/linux-2.6/xfs_buf.c

@@ -458,14 +458,7 @@ _pagebuf_lookup_pages(
 			unlock_page(bp->pb_pages[i]);
 	}
 
-	if (page_count) {
-		/* if we have any uptodate pages, mark that in the buffer */
-		bp->pb_flags &= ~PBF_NONE;
-
-		/* if some pages aren't uptodate, mark that in the buffer */
-		if (page_count != bp->pb_page_count)
-			bp->pb_flags |= PBF_PARTIAL;
-	}
+	bp->pb_flags &= ~PBF_NONE;
 
 	PB_TRACE(bp, "lookup_pages", (long)page_count);
 	return error;
@@ -676,7 +669,7 @@ xfs_buf_read_flags(
 
 	pb = xfs_buf_get_flags(target, ioff, isize, flags);
 	if (pb) {
-		if (PBF_NOT_DONE(pb)) {
+		if (!XFS_BUF_ISDONE(pb)) {
 			PB_TRACE(pb, "read", (unsigned long)flags);
 			XFS_STATS_INC(pb_get_read);
 			pagebuf_iostart(pb, flags);
@@ -813,7 +806,7 @@ pagebuf_get_no_daddr(
 	bp = pagebuf_allocate(0);
 	if (unlikely(bp == NULL))
 		goto fail;
-	_pagebuf_initialize(bp, target, 0, len, PBF_FORCEIO);
+	_pagebuf_initialize(bp, target, 0, len, 0);
 
  try_again:
 	data = kmem_alloc(malloc_len, KM_SLEEP | KM_MAYFAIL);
@@ -1121,21 +1114,18 @@ pagebuf_iodone_work(
 void
 pagebuf_iodone(
 	xfs_buf_t		*pb,
-	int			dataio,
 	int			schedule)
 {
 	pb->pb_flags &= ~(PBF_READ | PBF_WRITE);
-	if (pb->pb_error == 0) {
-		pb->pb_flags &= ~(PBF_PARTIAL | PBF_NONE);
-	}
+	if (pb->pb_error == 0)
+		pb->pb_flags &= ~PBF_NONE;
 
 	PB_TRACE(pb, "iodone", pb->pb_iodone);
 
 	if ((pb->pb_iodone) || (pb->pb_flags & PBF_ASYNC)) {
 		if (schedule) {
 			INIT_WORK(&pb->pb_iodone_work, pagebuf_iodone_work, pb);
-			queue_work(dataio ? xfsdatad_workqueue :
-				xfslogd_workqueue, &pb->pb_iodone_work);
+			queue_work(xfslogd_workqueue, &pb->pb_iodone_work);
 		} else {
 			pagebuf_iodone_work(pb);
 		}
@@ -1235,7 +1225,7 @@ _pagebuf_iodone(
 {
 	if (atomic_dec_and_test(&pb->pb_io_remaining) == 1) {
 		pb->pb_locked = 0;
-		pagebuf_iodone(pb, (pb->pb_flags & PBF_FS_DATAIOD), schedule);
+		pagebuf_iodone(pb, schedule);
 	}
 }
 

fs/xfs/linux-2.6/xfs_buf.h

@@ -69,14 +69,11 @@ typedef enum page_buf_flags_e {		/* pb_flags values */
 	PBF_READ = (1 << 0),	/* buffer intended for reading from device */
 	PBF_WRITE = (1 << 1),	/* buffer intended for writing to device   */
 	PBF_MAPPED = (1 << 2),  /* buffer mapped (pb_addr valid)           */
-	PBF_PARTIAL = (1 << 3), /* buffer partially read                   */
 	PBF_ASYNC = (1 << 4),   /* initiator will not wait for completion  */
 	PBF_NONE = (1 << 5),    /* buffer not read at all                  */
 	PBF_DELWRI = (1 << 6),  /* buffer has dirty pages                  */
 	PBF_STALE = (1 << 7),	/* buffer has been staled, do not find it  */
 	PBF_FS_MANAGED = (1 << 8),  /* filesystem controls freeing memory  */
-	PBF_FS_DATAIOD = (1 << 9),  /* schedule IO completion on fs datad  */
-	PBF_FORCEIO = (1 << 10),    /* ignore any cache state		   */
 	PBF_FLUSH = (1 << 11),	    /* flush disk write cache		   */
 	PBF_READ_AHEAD = (1 << 12), /* asynchronous read-ahead		   */
 
@@ -92,9 +89,6 @@ typedef enum page_buf_flags_e {		/* pb_flags values */
 	_PBF_DELWRI_Q = (1 << 21),   /* buffer on delwri queue		   */
 } page_buf_flags_t;
 
-#define PBF_UPDATE (PBF_READ | PBF_WRITE)
-#define PBF_NOT_DONE(pb) (((pb)->pb_flags & (PBF_PARTIAL|PBF_NONE)) != 0)
-#define PBF_DONE(pb) (((pb)->pb_flags & (PBF_PARTIAL|PBF_NONE)) == 0)
 
 typedef struct xfs_bufhash {
 	struct list_head	bh_list;
@@ -258,7 +252,6 @@ extern void pagebuf_unlock(		/* unlock buffer		*/
 
 extern void pagebuf_iodone(		/* mark buffer I/O complete	*/
 		xfs_buf_t *,		/* buffer to mark		*/
-		int,			/* use data/log helper thread.	*/
 		int);			/* run completion locally, or in
 					 * a helper thread.		*/
 
@@ -378,12 +371,12 @@ extern void pagebuf_trace(
 #define XFS_BUF_GETERROR(x)	 pagebuf_geterror(x)
 #define XFS_BUF_ISERROR(x)	 (pagebuf_geterror(x)?1:0)
 
-#define XFS_BUF_DONE(x)		 ((x)->pb_flags &= ~(PBF_PARTIAL|PBF_NONE))
-#define XFS_BUF_UNDONE(x)	 ((x)->pb_flags |= PBF_PARTIAL|PBF_NONE)
-#define XFS_BUF_ISDONE(x)	 (!(PBF_NOT_DONE(x)))
+#define XFS_BUF_DONE(x)		 ((x)->pb_flags &= ~PBF_NONE)
+#define XFS_BUF_UNDONE(x)	 ((x)->pb_flags |= PBF_NONE)
+#define XFS_BUF_ISDONE(x)	 (((x)->pb_flags & PBF_NONE) == 0)
 
-#define XFS_BUF_BUSY(x)		 ((x)->pb_flags |= PBF_FORCEIO)
-#define XFS_BUF_UNBUSY(x)	 ((x)->pb_flags &= ~PBF_FORCEIO)
+#define XFS_BUF_BUSY(x)		 do { } while (0)
+#define XFS_BUF_UNBUSY(x)	 do { } while (0)
 #define XFS_BUF_ISBUSY(x)	 (1)
 
 #define XFS_BUF_ASYNC(x)	 ((x)->pb_flags |= PBF_ASYNC)
@@ -412,9 +405,6 @@ extern void pagebuf_trace(
 
 #define XFS_BUF_BP_ISMAPPED(bp)	 1
 
-#define XFS_BUF_DATAIO(x)	((x)->pb_flags |= PBF_FS_DATAIOD)
-#define XFS_BUF_UNDATAIO(x)	((x)->pb_flags &= ~PBF_FS_DATAIOD)
-
 #define XFS_BUF_IODONE_FUNC(buf)	(buf)->pb_iodone
 #define XFS_BUF_SET_IODONE_FUNC(buf, func)	\
 			(buf)->pb_iodone = (func)
@@ -510,7 +500,7 @@ static inline void	xfs_buf_relse(xfs_buf_t *bp)
 	    pagebuf_trace(bp, id, NULL, (void *)__builtin_return_address(0))
 
 #define xfs_biodone(pb)		    \
-	    pagebuf_iodone(pb, (pb->pb_flags & PBF_FS_DATAIOD), 0)
+	    pagebuf_iodone(pb, 0)
 
 #define xfs_biomove(pb, off, len, data, rw) \
 	    pagebuf_iomove((pb), (off), (len), (data), \