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    Subject[PATCH 08/13] add fsync function
    Date
    From: Stefani Seibold <stefani@seibold.net>

    Signed-off-by: Stefani Seibold <stefani@seibold.net>
    ---
    drivers/usb/usb-skeleton.c | 8 +++++++-
    1 files changed, 7 insertions(+), 1 deletions(-)

    diff --git a/drivers/usb/usb-skeleton.c b/drivers/usb/usb-skeleton.c
    index dc95129..61f4ac8 100644
    --- a/drivers/usb/usb-skeleton.c
    +++ b/drivers/usb/usb-skeleton.c
    @@ -133,7 +133,7 @@ static void skel_draw_down(struct usb_skel *dev)
    usb_kill_urb(dev->bulk_in_urb);
    }

    -static int skel_flush(struct file *file, fl_owner_t id)
    +static int skel_fsync(struct file *file, loff_t start, loff_t end, int datasync)
    {
    struct usb_skel *dev = file->private_data;
    int retval;
    @@ -157,6 +157,11 @@ exit:
    return retval;
    }

    +static int skel_flush(struct file *file, fl_owner_t id)
    +{
    + return skel_fsync(file, 0, LLONG_MAX, 0);
    +}
    +
    static void skel_read_bulk_callback(struct urb *urb)
    {
    struct usb_skel *dev;
    @@ -470,6 +475,7 @@ static const struct file_operations skel_fops = {
    .write = skel_write,
    .open = skel_open,
    .release = skel_release,
    + .fsync = skel_fsync,
    .flush = skel_flush,
    .llseek = noop_llseek,
    };
    --
    1.7.8.6


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