cdev: Add discard_range hook

To pass though discard_range() to the underlying drivers add a
discard_range hook to struct cdev_operations.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

1 files changed, 1 insertions, 0 deletions

diff --git a/include/driver.h b/include/driver.h
index 74be1b3e8e..c9ad95fd40 100644
--- a/include/driver.h
+++ b/include/driver.h
@@ -441,6 +441,7 @@ struct cdev_operations {
 	int (*flush)(struct cdev*);
 	int (*erase)(struct cdev*, loff_t count, loff_t offset);
 	int (*protect)(struct cdev*, size_t count, loff_t offset, int prot);
+	int (*discard_range)(struct cdev*, loff_t count, loff_t offset);
 	int (*memmap)(struct cdev*, void **map, int flags);
 	int (*truncate)(struct cdev*, size_t size);
 };