diff options
| author | Mark Brown <broonie@linaro.org> | 2014-01-17 15:52:17 +0000 |
|---|---|---|
| committer | Mark Brown <broonie@linaro.org> | 2014-01-17 15:52:17 +0000 |
| commit | 81e53d0470878165a300d75ac06a5bc5eee543a2 (patch) | |
| tree | 5fdaacfb350c5a290109f98ab29e9858f1f11469 /arch/x86/include/asm/trace/irq_vectors.h | |
| parent | 15e0964dc2a097de3cf518badf2237b6b6adf7fe (diff) | |
| parent | fcb4ed749c776a2ae89ca40343cbccb6f8981e60 (diff) | |
Merge branches 'topic/sc18is602' and 'topic/rspi' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi into spi-bpw
Diffstat (limited to 'arch/x86/include/asm/trace/irq_vectors.h')
| -rw-r--r-- | arch/x86/include/asm/trace/irq_vectors.h | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/arch/x86/include/asm/trace/irq_vectors.h b/arch/x86/include/asm/trace/irq_vectors.h index 2874df24e7a..4cab890007a 100644 --- a/arch/x86/include/asm/trace/irq_vectors.h +++ b/arch/x86/include/asm/trace/irq_vectors.h @@ -72,6 +72,17 @@ DEFINE_IRQ_VECTOR_EVENT(x86_platform_ipi); DEFINE_IRQ_VECTOR_EVENT(irq_work); /* + * We must dis-allow sampling irq_work_exit() because perf event sampling + * itself can cause irq_work, which would lead to an infinite loop; + * + * 1) irq_work_exit happens + * 2) generates perf sample + * 3) generates irq_work + * 4) goto 1 + */ +TRACE_EVENT_PERF_PERM(irq_work_exit, is_sampling_event(p_event) ? -EPERM : 0); + +/* * call_function - called when entering/exiting a call function interrupt * vector handler */ |