USB: Allow usbmon as a module even if usbcore is builtin

usbmon can only be built as a module if usbcore is a module too. Trivial
changes to the relevant Kconfig and Makefile (and a few trivial changes
elsewhere) allow usbmon to be built as a module even if usbcore is
builtin.

This is verified to work in all 9 permutations (3 correctly prohibited
by Kconfig, 6 build a suitable result).

Signed-off-by: Paul Bolle <pebolle@tiscali.nl>
Signed-off-by: Pete Zaitcev <zaitcev@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

2 files changed, 7 insertions, 9 deletions

diff --git a/drivers/usb/mon/Kconfig b/drivers/usb/mon/Kconfig
index deb9ddffa402..f28f350cd96a 100644
--- a/drivers/usb/mon/Kconfig
+++ b/drivers/usb/mon/Kconfig
@@ -3,14 +3,13 @@
 #
 
 config USB_MON
-        bool "USB Monitor"
-        depends on USB!=n
-        default y
+        tristate "USB Monitor"
+        depends on USB
+        default y if USB=y
+        default m if USB=m
         help
-          If you say Y here, a component which captures the USB traffic
+          If you select this option, a component which captures the USB traffic
           between peripheral-specific drivers and HC drivers will be built.
           For more information, see <file:Documentation/usb/usbmon.txt>.
 
-          This is somewhat experimental at this time, but it should be safe.
-
-          If unsure, say Y.
+          If unsure, say Y (if allowed), otherwise M.
diff --git a/drivers/usb/mon/Makefile b/drivers/usb/mon/Makefile
index 0f76ed5e1617..c6516b566731 100644
--- a/drivers/usb/mon/Makefile
+++ b/drivers/usb/mon/Makefile
@@ -4,5 +4,4 @@
 
 usbmon-objs     := mon_main.o mon_stat.o mon_text.o mon_bin.o mon_dma.o
 
-# This does not use CONFIG_USB_MON because we want this to use a tristate.
-obj-$(CONFIG_USB)       += usbmon.o
+obj-$(CONFIG_USB_MON)   += usbmon.o