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block: add a cdrom_device_info pointer to struct gendisk

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Add a pointer to the CDROM information structure to struct gendisk.
This will allow various removable media file systems to call directly
into the CDROM layer instead of abusing ioctls with kernel pointers.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Damien Le Moal <damien.lemoal@wdc.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Christoph Hellwig 2020-04-25 09:57:00 +02:00 • committed by Jens Axboe
parent 21f3cfeab3
commit a711d91cd9
7 changed files with 18 additions and 8 deletions
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2
include/linux/cdrom.h
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@ -104,7 +104,7 @@ extern unsigned int cdrom_check_events(struct cdrom_device_info *cdi,
unsigned int clearing);
extern int cdrom_media_changed(struct cdrom_device_info *);
extern int register_cdrom(struct cdrom_device_info *cdi);
extern int register_cdrom(struct gendisk *disk, struct cdrom_device_info *cdi);
extern void unregister_cdrom(struct cdrom_device_info *cdi);
typedef struct {