X-Git-Url: https://git.karo-electronics.de/?a=blobdiff_plain;f=kernel%2Frelay.c;h=d080b9d161a75eee95bbf6d7aed235354bda9e9c;hb=9f10d9ee0ac6d79d7bc8b9a158bf4a29322d84d3;hp=510fbbd7b5004e6ccbfd0fa55465621861c5cc8c;hpb=8269cc4e2b0ddcdcb9e7f2034c464ef8613737a1;p=mv-sheeva.git

diff --git a/kernel/relay.c b/kernel/relay.c
index 510fbbd7b50..d080b9d161a 100644
--- a/kernel/relay.c
+++ b/kernel/relay.c
@@ -1,7 +1,7 @@
 /*
  * Public API and common code for kernel->userspace relay file support.
  *
- * See Documentation/filesystems/relayfs.txt for an overview of relayfs.
+ * See Documentation/filesystems/relay.txt for an overview.
  *
  * Copyright (C) 2002-2005 - Tom Zanussi (zanussi@us.ibm.com), IBM Corp
  * Copyright (C) 1999-2005 - Karim Yaghmour (karim@opersys.com)
@@ -37,37 +37,31 @@ static void relay_file_mmap_close(struct vm_area_struct *vma)
 }
 
 /*
- * nopage() vm_op implementation for relay file mapping.
+ * fault() vm_op implementation for relay file mapping.
  */
-static struct page *relay_buf_nopage(struct vm_area_struct *vma,
-				     unsigned long address,
-				     int *type)
+static int relay_buf_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
 {
 	struct page *page;
 	struct rchan_buf *buf = vma->vm_private_data;
-	unsigned long offset = address - vma->vm_start;
+	pgoff_t pgoff = vmf->pgoff;
 
-	if (address > vma->vm_end)
-		return NOPAGE_SIGBUS; /* Disallow mremap */
 	if (!buf)
-		return NOPAGE_OOM;
+		return VM_FAULT_OOM;
 
-	page = vmalloc_to_page(buf->start + offset);
+	page = vmalloc_to_page(buf->start + (pgoff << PAGE_SHIFT));
 	if (!page)
-		return NOPAGE_OOM;
+		return VM_FAULT_SIGBUS;
 	get_page(page);
+	vmf->page = page;
 
-	if (type)
-		*type = VM_FAULT_MINOR;
-
-	return page;
+	return 0;
 }
 
 /*
  * vm_ops for relay file mappings.
  */
 static struct vm_operations_struct relay_file_mmap_ops = {
-	.nopage = relay_buf_nopage,
+	.fault = relay_buf_fault,
 	.close = relay_file_mmap_close,
 };
 
@@ -92,6 +86,7 @@ static int relay_mmap_buf(struct rchan_buf *buf, struct vm_area_struct *vma)
 		return -EINVAL;
 
 	vma->vm_ops = &relay_file_mmap_ops;
+	vma->vm_flags |= VM_DONTEXPAND;
 	vma->vm_private_data = buf;
 	buf->chan->cb->buf_mapped(buf, filp);
 
@@ -370,7 +365,7 @@ void relay_reset(struct rchan *chan)
 	if (!chan)
 		return;
 
- 	if (chan->is_global && chan->buf[0]) {
+	if (chan->is_global && chan->buf[0]) {
 		__relay_reset(chan->buf[0], 0);
 		return;
 	}
@@ -426,6 +421,7 @@ static struct rchan_buf *relay_open_buf(struct rchan *chan, unsigned int cpu)
 
 free_buf:
  	relay_destroy_buf(buf);
+ 	buf = NULL;
 free_name:
  	kfree(tmpname);
 end:
@@ -849,13 +845,13 @@ static int relay_file_read_avail(struct rchan_buf *buf, size_t read_pos)
 		buf->subbufs_consumed = consumed;
 		buf->bytes_consumed = 0;
 	}
-	
+
 	produced = (produced % n_subbufs) * subbuf_size + buf->offset;
 	consumed = (consumed % n_subbufs) * subbuf_size + buf->bytes_consumed;
 
 	if (consumed > produced)
 		produced += n_subbufs * subbuf_size;
-	
+
 	if (consumed == produced)
 		return 0;