[XFS] remove some dead code from pagebuf

SGI Modid: 2.5.x-xfs:slinx:134960a

fs/xfs/pagebuf/page_buf.c

@@ -786,28 +786,6 @@ pagebuf_get(				/* allocate a buffer		*/
 	return (pb);
 }
 
-/*
- * Create a pagebuf and populate it with pages from the address
- * space of the passed in inode.
- */
-page_buf_t *
-pagebuf_lookup(
-	struct pb_target	*target,
-	struct inode		*inode,
-	loff_t			ioff,
-	size_t			isize,
-	page_buf_flags_t	flags)
-{
-	page_buf_t		*pb = NULL;
-
-	flags |= _PBF_PRIVATE_BH;
-	pb = pagebuf_allocate(flags);
-	if (pb) {
-		_pagebuf_initialize(pb, target, ioff, isize, flags);
-	}
-	return pb;
-}
-
 /*
  * If we are not low on memory then do the readahead in a deadlock
  * safe manner.
@@ -905,7 +883,7 @@ pagebuf_associate_memory(
 	pb->pb_locked = 0;
 
 	pb->pb_count_desired = pb->pb_buffer_length = len;
-	pb->pb_flags |= PBF_MAPPED | _PBF_PRIVATE_BH;
+	pb->pb_flags |= PBF_MAPPED;
 
 	return 0;
 }

fs/xfs/pagebuf/page_buf.h

@@ -109,7 +109,6 @@ typedef enum page_buf_flags_e {		/* pb_flags values */
 
 	/* flags used only internally */
 	_PBF_LOCKABLE = (1 << 19), /* page_buf_t may be locked		   */
-	_PBF_PRIVATE_BH = (1 << 20), /* do not use public buffer heads	   */
 	_PBF_ALL_PAGES_MAPPED = (1 << 21),
 				/* all pages in rage are mapped		   */
 	_PBF_ADDR_ALLOCATED = (1 << 22),
@@ -251,14 +250,6 @@ extern page_buf_t *pagebuf_get(		/* allocate a buffer		*/
 		page_buf_flags_t);	/* PBF_LOCK, PBF_READ,		*/
 					/* PBF_ASYNC			*/	
 
-extern page_buf_t *pagebuf_lookup(
-		struct pb_target *,
-		struct inode *,
-		loff_t,			/* starting offset of range	*/
-		size_t,			/* length of range		*/
-		page_buf_flags_t);	/* PBF_READ, PBF_WRITE,		*/
-					/* PBF_FORCEIO, _PBF_LOCKABLE	*/
-
 extern page_buf_t *pagebuf_get_empty(	/* allocate pagebuf struct with */
 					/*  no memory or disk address	*/
 		struct pb_target *);	/* mount point "fake" inode	*/