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由 Lai Jiangshan 提交于
This commit replaces disabling of preemption and decrement of a per-CPU variable with this_cpu_dec(), which avoids preemption disabling on x86 and shortens the code on all platforms. Signed-off-by: NLai Jiangshan <laijs@cn.fujitsu.com> Signed-off-by: NPaul E. McKenney <paulmck@linux.vnet.ibm.com>
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