tree 0494df3b68a28ce0b23a1577758b583409621a7d
parent f20a9ead0d005fbeeae3fc21a96f9bf197ac1c1c
author Greg Kroah-Hartman <gregkh@suse.de> 1153245599 -0700
committer Greg Kroah-Hartman <gregkh@suse.de> 1159243720 -0700

Driver Core: add ability for drivers to do a threaded probe

This adds the infrastructure for drivers to do a threaded probe, and
waits at init time for all currently outstanding probes to complete.

A new kernel thread will be created when the probe() function for the
driver is called, if the multithread_probe bit is set in the driver
saying it can support this kind of operation.

I have tested this with USB and PCI, and it works, and shaves off a lot
of time in the boot process, but there are issues with finding root boot
disks, and some USB drivers assume that this can never happen, so it is
currently not enabled for any bus type.  Individual drivers can enable
this right now if they wish, and bus authors can selectivly turn it on
as well, once they determine that their subsystem will work properly
with it.

Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>