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Diffstat (limited to 'fs/nfs/direct.c')
-rw-r--r--fs/nfs/direct.c20
1 files changed, 19 insertions, 1 deletions
diff --git a/fs/nfs/direct.c b/fs/nfs/direct.c
index aaffaaa336cc..47d892a1d363 100644
--- a/fs/nfs/direct.c
+++ b/fs/nfs/direct.c
@@ -472,13 +472,31 @@ out:
return result;
}
+static void nfs_direct_add_page_head(struct list_head *list,
+ struct nfs_page *req)
+{
+ struct nfs_page *head = req->wb_head;
+
+ if (!list_empty(&head->wb_list) || !nfs_lock_request(head))
+ return;
+ if (!list_empty(&head->wb_list)) {
+ nfs_unlock_request(head);
+ return;
+ }
+ list_add(&head->wb_list, list);
+ kref_get(&head->wb_kref);
+ kref_get(&head->wb_kref);
+}
+
static void nfs_direct_join_group(struct list_head *list, struct inode *inode)
{
struct nfs_page *req, *subreq;
list_for_each_entry(req, list, wb_list) {
- if (req->wb_head != req)
+ if (req->wb_head != req) {
+ nfs_direct_add_page_head(&req->wb_list, req);
continue;
+ }
subreq = req->wb_this_page;
if (subreq == req)
continue;