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由 Andrew Morton 提交于
Fix http://bugzilla.kernel.org/show_bug.cgi?id=6716 Doing a sysrq over a serial line into an SMP machine presently deadlocks. Signed-off-by: NAndrew Morton <akpm@osdl.org> Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
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