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    Subject[PATCH v3 5/6] block: increment sequence number
    Date
    From: Matteo Croce <mcroce@microsoft.com>

    Increment the disk sequence number when the media has changed,
    i.e. on DISK_EVENT_MEDIA_CHANGE event.

    $ cat /sys/class/block/sr0/diskseq
    12
    $ eject
    $ cat /sys/class/block/sr0/diskseq
    22

    Signed-off-by: Matteo Croce <mcroce@microsoft.com>
    ---
    block/genhd.c | 3 +++
    1 file changed, 3 insertions(+)

    diff --git a/block/genhd.c b/block/genhd.c
    index 768d8d5d1eca..9d58e0ea18ae 100644
    --- a/block/genhd.c
    +++ b/block/genhd.c
    @@ -1657,6 +1657,9 @@ static void disk_check_events(struct disk_events *ev,

    spin_unlock_irq(&ev->lock);

    + if (events & DISK_EVENT_MEDIA_CHANGE)
    + inc_diskseq(disk);
    +
    /*
    * Tell userland about new events. Only the events listed in
    * @disk->events are reported, and only if DISK_EVENT_FLAG_UEVENT
    --
    2.31.1
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