NFS: Debugging code for nfs_direct_(read|write)_schedule()
Make sure that we're doing our list accounting correctly.
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
diff --git a/fs/nfs/direct.c b/fs/nfs/direct.c
index e6585b9..1e3725e 100644
--- a/fs/nfs/direct.c
+++ b/fs/nfs/direct.c
@@ -339,6 +339,7 @@
if (count < rsize)
bytes = count;
+ BUG_ON(list_empty(list));
data = list_entry(list->next, struct nfs_read_data, pages);
list_del_init(&data->pages);
@@ -378,6 +379,7 @@
count -= bytes;
} while (count != 0);
+ BUG_ON(!list_empty(list));
}
static ssize_t nfs_direct_read(struct kiocb *iocb, unsigned long user_addr, size_t count, loff_t pos, struct page **pages, unsigned int nr_pages)
@@ -657,6 +659,7 @@
if (count < wsize)
bytes = count;
+ BUG_ON(list_empty(list));
data = list_entry(list->next, struct nfs_write_data, pages);
list_move_tail(&data->pages, &dreq->rewrite_list);
@@ -697,6 +700,7 @@
count -= bytes;
} while (count != 0);
+ BUG_ON(!list_empty(list));
}
static ssize_t nfs_direct_write(struct kiocb *iocb, unsigned long user_addr, size_t count, loff_t pos, struct page **pages, int nr_pages)