On Fri, Jan 08, 2021 at 09:52:23PM +0800, zhenwei pi wrote: > Suggested by Paolo, add a module parameter that can be used to limit > which capabilities the driver uses. > > Finally, the pvpanic guest driver works by the limitation of both > device capability and user setting. > > Signed-off-by: zhenwei pi <pizhen...@bytedance.com> > --- > drivers/misc/pvpanic.c | 6 +++++- > 1 file changed, 5 insertions(+), 1 deletion(-) > > diff --git a/drivers/misc/pvpanic.c b/drivers/misc/pvpanic.c > index e1023c7b8fb0..417f1086e764 100644 > --- a/drivers/misc/pvpanic.c > +++ b/drivers/misc/pvpanic.c > @@ -19,6 +19,10 @@ > #include <uapi/misc/pvpanic.h> > > static void __iomem *base; > +static unsigned int events = PVPANIC_PANICKED | PVPANIC_CRASH_LOADED; > +module_param(events, uint, 0644); > +MODULE_PARM_DESC(events, "set event limitation of pvpanic device");
I do not understand you wanting a module parameter as well as a sysfs file. Why is this needed? Why are you spreading this information out across different apis and locations? Again, adding module parameters is almost never a good idea anymore, they are a pain to manage and use. thanks, greg k-h
