On 7/30/2021 3:01 AM, Shiyang Ruan wrote:
--- a/drivers/dax/super.c
+++ b/drivers/dax/super.c
@@ -214,6 +214,8 @@ enum dax_device_flags {
* @cdev: optional character interface for "device dax"
* @host: optional name for lookups where the device path is not available
* @private: dax driver private data
+ * @holder_rwsem: prevent unregistration while holder_ops is in progress
+ * @holder_data: holder of a dax_device: could be filesystem or mapped device
* @flags: state and boolean properties
Perhaps add two documentary lines for @ops and @holder_ops?
*/
struct dax_device {
@@ -222,8 +224,11 @@ struct dax_device {
struct cdev cdev;
const char *host;
void *private;
+ struct rw_semaphore holder_rwsem;
+ void *holder_data;
unsigned long flags;
const struct dax_operations *ops;
+ const struct dax_holder_operations *holder_ops;
};
thanks,
-jane
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