rcutorture: Permit test to be started via sysfs

The intent of rcutorture.torture_runnable is to allow rcutorture to be
built into the kernel (as opposed to being a module), but to be started
manually via sysfs.  For this to work, the module_param() permissions
need to allow writing.  This commit therefore changes these permission to
0644, so that root can start and stop the rcutorture tests.

Reported-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
1 file changed