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commit 11034ae9 upstream

Initialization of variable irq_flags and pc was missed when backport
11034ae9

 to linux-3.0.y and linux-3.4.y, my fault.
Signed-off-by: zhangwei(Jovi) <jovi.zhangwei@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>