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| author | Heiko Carstens <heiko.carstens@de.ibm.com> | 2012-09-17 04:38:22 (GMT) |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2012-09-26 13:45:24 (GMT) |
| commit | 28634a07d3f72f2c186ad465e58f72e728c5cd4e (patch) | |
| tree | bc3b2063834b72205470efea903d366f42ba255b /arch/s390/include/asm/topology.h | |
| parent | 0ed23b3e495807809873bb607d12c857ae9ab7c2 (diff) | |
| download | linux-fsl-qoriq-28634a07d3f72f2c186ad465e58f72e728c5cd4e.tar.xz | |
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>
Diffstat (limited to 'arch/s390/include/asm/topology.h')
0 files changed, 0 insertions, 0 deletions