NFS: Convert struct nfs_page to use krefs
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
diff --git a/include/linux/nfs_page.h b/include/linux/nfs_page.h
index bd193af..c780e7e 100644
--- a/include/linux/nfs_page.h
+++ b/include/linux/nfs_page.h
@@ -16,7 +16,7 @@
#include <linux/sunrpc/auth.h>
#include <linux/nfs_xdr.h>
-#include <asm/atomic.h>
+#include <linux/kref.h>
/*
* Valid flags for the radix tree
@@ -42,7 +42,7 @@
unsigned int wb_offset, /* Offset & ~PAGE_CACHE_MASK */
wb_pgbase, /* Start of page data */
wb_bytes; /* Length of request */
- atomic_t wb_count; /* reference count */
+ struct kref wb_kref; /* reference count */
unsigned long wb_flags;
struct nfs_writeverf wb_verf; /* Commit cookie */
};
@@ -89,7 +89,7 @@
/*
- * Lock the page of an asynchronous request without incrementing the wb_count
+ * Lock the page of an asynchronous request without getting a new reference
*/
static inline int
nfs_lock_request_dontget(struct nfs_page *req)
@@ -98,14 +98,14 @@
}
/*
- * Lock the page of an asynchronous request
+ * Lock the page of an asynchronous request and take a reference
*/
static inline int
nfs_lock_request(struct nfs_page *req)
{
if (test_and_set_bit(PG_BUSY, &req->wb_flags))
return 0;
- atomic_inc(&req->wb_count);
+ kref_get(&req->wb_kref);
return 1;
}