Al Viro wrote: > On Mon, May 04, 2009 at 01:57:45PM -0400, Gregory Haskins wrote: > >> @@ -56,6 +57,7 @@ int eventfd_signal(struct file *file, int n) >> >> return n; >> } >> +EXPORT_SYMBOL_GPL(eventfd_signal); >> > > perhaps, but... > > >> @@ -197,6 +199,7 @@ struct file *eventfd_fget(int fd) >> >> return file; >> } >> +EXPORT_SYMBOL_GPL(eventfd_fget); >> > > this one looks very odd. Could you show legitimate users? > Hi Al,
I plan on using this in a similar way as the AIO io_submit function does today for the next version of the virtual-bus patches. That is, userspace allocates an eventfd (in this case, via kvm_irqfd() and the kernel side code you have been reviewing) and subsequently submits the fd to a unique virtual-bus instance in the kernel via an ioctl(). This will ultimately associate the vbus instance dynamically with the kvm instance in a loosely coupled relationship. Vbus may be compiled as a module, thus the export. -Greg
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