xfs: use ->invalidatepage() length argument

->invalidatepage() aop now accepts range to invalidate so we can make
use of it in xfs_vm_invalidatepage()

Signed-off-by: Lukas Czerner <lczerner@redhat.com>
Acked-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Ben Myers <bpm@sgi.com>
Cc: xfs@oss.sgi.com

fs/xfs/xfs_aops.c

@@ -827,8 +827,9 @@ xfs_vm_invalidatepage(
 	unsigned int		offset,
 	unsigned int		length)
 {
-	trace_xfs_invalidatepage(page->mapping->host, page, offset);
-	block_invalidatepage(page, offset, PAGE_CACHE_SIZE - offset);
+	trace_xfs_invalidatepage(page->mapping->host, page, offset,
+				 length);
+	block_invalidatepage(page, offset, length);
 }
 
 /*
@@ -922,7 +923,7 @@ xfs_vm_writepage(
 	int			count = 0;
 	int			nonblocking = 0;
 
-	trace_xfs_writepage(inode, page, 0);
+	trace_xfs_writepage(inode, page, 0, 0);
 
 	ASSERT(page_has_buffers(page));
 
@@ -1153,7 +1154,7 @@ xfs_vm_releasepage(
 {
 	int			delalloc, unwritten;
 
-	trace_xfs_releasepage(page->mapping->host, page, 0);
+	trace_xfs_releasepage(page->mapping->host, page, 0, 0);
 
 	xfs_count_page_state(page, &delalloc, &unwritten);
 

fs/xfs/xfs_trace.h

@@ -974,14 +974,16 @@ DEFINE_RW_EVENT(xfs_file_splice_read);
 DEFINE_RW_EVENT(xfs_file_splice_write);
 
 DECLARE_EVENT_CLASS(xfs_page_class,
-	TP_PROTO(struct inode *inode, struct page *page, unsigned long off),
-	TP_ARGS(inode, page, off),
+	TP_PROTO(struct inode *inode, struct page *page, unsigned long off,
+		 unsigned int len),
+	TP_ARGS(inode, page, off, len),
 	TP_STRUCT__entry(
 		__field(dev_t, dev)
 		__field(xfs_ino_t, ino)
 		__field(pgoff_t, pgoff)
 		__field(loff_t, size)
 		__field(unsigned long, offset)
+		__field(unsigned int, length)
 		__field(int, delalloc)
 		__field(int, unwritten)
 	),
@@ -995,24 +997,27 @@ DECLARE_EVENT_CLASS(xfs_page_class,
 		__entry->pgoff = page_offset(page);
 		__entry->size = i_size_read(inode);
 		__entry->offset = off;
+		__entry->length = len;
 		__entry->delalloc = delalloc;
 		__entry->unwritten = unwritten;
 	),
 	TP_printk("dev %d:%d ino 0x%llx pgoff 0x%lx size 0x%llx offset %lx "
-		  "delalloc %d unwritten %d",
+		  "length %x delalloc %d unwritten %d",
 		  MAJOR(__entry->dev), MINOR(__entry->dev),
 		  __entry->ino,
 		  __entry->pgoff,
 		  __entry->size,
 		  __entry->offset,
+		  __entry->length,
 		  __entry->delalloc,
 		  __entry->unwritten)
 )
 
 #define DEFINE_PAGE_EVENT(name)		\
 DEFINE_EVENT(xfs_page_class, name,	\
-	TP_PROTO(struct inode *inode, struct page *page, unsigned long off),	\
-	TP_ARGS(inode, page, off))
+	TP_PROTO(struct inode *inode, struct page *page, unsigned long off, \
+		 unsigned int len),	\
+	TP_ARGS(inode, page, off, len))
 DEFINE_PAGE_EVENT(xfs_writepage);
 DEFINE_PAGE_EVENT(xfs_releasepage);
 DEFINE_PAGE_EVENT(xfs_invalidatepage);