path: root/Documentation/cdrom
diff options
authorChristoph Hellwig <>2020-07-08 14:25:42 +0200
committerJens Axboe <>2020-07-08 16:20:01 -0600
commit8c22eb3a77373c616f141b56f44ef225ee15c96b (patch)
tree3c1bdb026a0d7be28cba4175dd93e3a96bba16d4 /Documentation/cdrom
parenta564e23f0f99759f453dbefcb9160dec6d99df96 (diff)
cdrom: remove the unused cdrom_media_changed function
As well as the ->media_changed method. All these are left over from before the drivers were switched over to the check_events scheme. Signed-off-by: Christoph Hellwig <> Signed-off-by: Jens Axboe <>
Diffstat (limited to 'Documentation/cdrom')
1 files changed, 1 insertions, 17 deletions
diff --git a/Documentation/cdrom/cdrom-standard.rst b/Documentation/cdrom/cdrom-standard.rst
index dde4f7f7fdbf..2de905810590 100644
--- a/Documentation/cdrom/cdrom-standard.rst
+++ b/Documentation/cdrom/cdrom-standard.rst
@@ -157,7 +157,6 @@ with the kernel as a block device by registering the following general
cdrom_release, /∗ release ∗/
NULL, /∗ fsync ∗/
NULL, /∗ fasync ∗/
- cdrom_media_changed, /∗ media change ∗/
NULL /∗ revalidate ∗/
@@ -368,19 +367,6 @@ which may or may not be in the drive). If the drive is not a changer,
- int media_changed(struct cdrom_device_info *cdi, int disc_nr)
-This function is very similar to the original function in $struct
-file_operations*. It returns 1 if the medium of the device *cdi->dev*
-has changed since the last call, and 0 otherwise. The parameter
-*disc_nr* identifies a specific slot in a juke-box, it should be
-ignored for single-disc drives. Note that by `re-routing` this
-function through *cdrom_media_changed()*, we can implement separate
-queues for the VFS and a new *ioctl()* function that can report device
-changes to software (e. g., an auto-mounting daemon).
int tray_move(struct cdrom_device_info *cdi, int position)
This function, if implemented, should control the tray movement. (No
@@ -917,9 +903,7 @@ commands can be identified by the underscores in their names.
maximum number of discs in the juke-box found in the *cdrom_dops*.
Returns 1 if a disc has been changed since the last call.
- Note that calls to *cdrom_media_changed* by the VFS are treated
- by an independent queue, so both mechanisms will detect a
- media change once. For juke-boxes, an extra argument *arg*
+ For juke-boxes, an extra argument *arg*
specifies the slot for which the information is given. The special
value *CDSL_CURRENT* requests that information about the currently
selected slot be returned.