AuxXxilium/linux_dsm_epyc7002
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28634a07d3
linux_dsm_epyc7002/arch/s390/include
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Heiko Carstens 28634a07d3 s390/percpu: implement this_cpu_xchg() 
The generic variant has a local_irq_save/restore pair which is quite
expensive. It is sufficient to disable preemption, which is a no-op
with !CONFIG_PREEMPT and then use the regular xchg macro.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2012-09-26 15:45:24 +02:00
..
asm s390/percpu: implement this_cpu_xchg() 2012-09-26 15:45:24 +02:00