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Wrap smp_processor_id in kpreempt_[dis|en]able

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After surveying the code, the few places where smp_processor_id is used
were deemed to be safe to use with a preempt enabled kernel. As such, no
core logic had to be changed. These smp_processor_id call sites are simply
are wrapped in kpreempt_disable and kpreempt_enabled to prevent the
Linux kernel from emitting scary warnings.

Signed-off-by: Prakash Surya <surya1@llnl.gov>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Richard Yao <ryao@cs.stonybrook.edu>
Issue #83
This commit is contained in:
Prakash Surya
2012-08-23 17:45:31 -07:00
committed by Brian Behlendorf
parent 52cd92022e
commit 15a9e03368
3 changed files with 22 additions and 2 deletions
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module/zfs/fm.c
+7 -1
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@@ -1413,7 +1413,13 @@ fm_ena_generate_cpu(uint64_t timestamp, processorid_t cpuid, uchar_t format)
uint64_t
fm_ena_generate(uint64_t timestamp, uchar_t format)
{
return (fm_ena_generate_cpu(timestamp, getcpuid(), format));
uint64_t ena;
kpreempt_disable();
ena = fm_ena_generate_cpu(timestamp, getcpuid(), format);
kpreempt_enable();
return (ena);
}
uint64_t