On Fri, 2008-04-25 at 00:57 -0700, David Miller wrote:
FWIW I do think this is a valid 'bug' fix in that the called user func()
can now see its from interrupt context. in_interrupt() would have
reported false due to the missing irq_enter()/irq_exit() - not sure if
any smp_call_function() relies on it though.