No functional change, new helper is added so that we can unifying buffered
IO on backing file.
Signed-off-by: Ming Lei <ming.lei@xxxxxxxxxx>
---
drivers/block/loop.c | 13 +++++++++----
1 file changed, 9 insertions(+), 4 deletions(-)
diff --git a/drivers/block/loop.c b/drivers/block/loop.c
index 8c3f5d2affc7..769cf84c6899 100644
--- a/drivers/block/loop.c
+++ b/drivers/block/loop.c
@@ -571,6 +571,14 @@ static void lo_rw_aio_complete(struct kiocb *iocb, long ret, long ret2)
lo_rw_aio_do_completion(cmd);
}
+static inline int lo_call_backing_rw_iter(struct file *file,
+ struct kiocb *iocb, struct iov_iter *iter, bool rw)
+{
+ if (rw == WRITE)
+ return call_write_iter(file, iocb, iter);
+ return call_read_iter(file, iocb, iter);
+}
+
static int lo_rw_aio(struct loop_device *lo, struct loop_cmd *cmd,
loff_t pos, bool rw)
{
@@ -628,10 +636,7 @@ static int lo_rw_aio(struct loop_device *lo, struct loop_cmd *cmd,
cmd->iocb.ki_flags = IOCB_DIRECT;
cmd->iocb.ki_ioprio = IOPRIO_PRIO_VALUE(IOPRIO_CLASS_NONE, 0);
- if (rw == WRITE)
- ret = call_write_iter(file, &cmd->iocb, &iter);
- else
- ret = call_read_iter(file, &cmd->iocb, &iter);
+ ret = lo_call_backing_rw_iter(file, &cmd->iocb, &iter, rw);
lo_rw_aio_do_completion(cmd);
--
2.31.1
