WorkStruct: make allyesconfig

Fix up for make allyesconfig.

Signed-Off-By: David Howells <dhowells@redhat.com>
diff --git a/drivers/infiniband/hw/ipath/ipath_user_pages.c b/drivers/infiniband/hw/ipath/ipath_user_pages.c
index 413754b..8536aeb 100644
--- a/drivers/infiniband/hw/ipath/ipath_user_pages.c
+++ b/drivers/infiniband/hw/ipath/ipath_user_pages.c
@@ -214,9 +214,10 @@
 	unsigned long num_pages;
 };
 
-static void user_pages_account(void *ptr)
+static void user_pages_account(struct work_struct *_work)
 {
-	struct ipath_user_pages_work *work = ptr;
+	struct ipath_user_pages_work *work =
+		container_of(_work, struct ipath_user_pages_work, work);
 
 	down_write(&work->mm->mmap_sem);
 	work->mm->locked_vm -= work->num_pages;
@@ -242,7 +243,7 @@
 
 	goto bail;
 
-	INIT_WORK(&work->work, user_pages_account, work);
+	INIT_WORK(&work->work, user_pages_account);
 	work->mm = mm;
 	work->num_pages = num_pages;