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| author | Heiko Carstens <heiko.carstens@de.ibm.com> | 2011-05-23 10:24:32 +0200 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2011-05-23 10:24:29 +0200 |
| commit | 4c2241fd42298007d7c3a92318806a4a9490a93c (patch) | |
| tree | 13e9af56e8f0badae7c8a238901e542163c115e2 /samples | |
| parent | add7490c273650c3aa8012f3e082aa64af86f17c (diff) | |
| download | blackbird-op-linux-4c2241fd42298007d7c3a92318806a4a9490a93c.tar.gz blackbird-op-linux-4c2241fd42298007d7c3a92318806a4a9490a93c.zip | |
[S390] percpu: implement arch specific irqsafe_cpu_ops
Implement arch specific irqsafe_cpu ops. The arch specific ops do not
disable/enable interrupts since that is an expensive operation. Instead
we disable preemption and perform a compare and swap loop.
Since on server distros (the ones we care about) preemption is disabled
the preempt_disable()/preempt_enable() pair is a nop.
In the end this code should be faster than the generic one.
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'samples')
0 files changed, 0 insertions, 0 deletions
