From: Martin Kepplinger Date: Wed, 29 Oct 2014 19:22:58 +0000 (+0100) Subject: char: misc: document behaviour of open() X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=965ab29ba09d75056a6c9b0f707cd1c2cc91188f;p=linux-beck.git char: misc: document behaviour of open() an open syscall now assignes file->private_data to a pointer to the miscdevice structure. This reminds driver developers not to duplicate code if they need this. Signed-off-by: Martin Kepplinger Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/char/misc.c b/drivers/char/misc.c index 205ad4c58470..69a08a6b43aa 100644 --- a/drivers/char/misc.c +++ b/drivers/char/misc.c @@ -169,7 +169,9 @@ static const struct file_operations misc_fops = { * the minor number requested is used. * * The structure passed is linked into the kernel and may not be - * destroyed until it has been unregistered. + * destroyed until it has been unregistered. By default, an open() + * syscall to the device sets file->private_data to point to the + * structure. * * A zero is returned on success and a negative errno code for * failure.