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It's possible for a context switch, and CPU migration, to occur between fetching the PCPU context and extracting the pc_curpcb. This can cause the fault handler to be installed for the wrong thread, leading to a panic in copyin()/copyout(). Since curthread is already in %r13, just use that directly, as GPRs are migrated, so there is no migration race risk. |
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| .. | ||
| aim | ||
| amigaone | ||
| booke | ||
| conf | ||
| cpufreq | ||
| fpu | ||
| include | ||
| mambo | ||
| mikrotik | ||
| mpc85xx | ||
| ofw | ||
| powermac | ||
| powernv | ||
| powerpc | ||
| ps3 | ||
| pseries | ||
| psim | ||