Commit 965ab29b authored by Martin Kepplinger's avatar Martin Kepplinger Committed by Greg Kroah-Hartman

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: default avatarMartin Kepplinger <martink@posteo.de>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 2bfeeca1
...@@ -169,7 +169,9 @@ static const struct file_operations misc_fops = { ...@@ -169,7 +169,9 @@ static const struct file_operations misc_fops = {
* the minor number requested is used. * the minor number requested is used.
* *
* The structure passed is linked into the kernel and may not be * 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 * A zero is returned on success and a negative errno code for
* failure. * failure.
......
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