83b22b05e6
amd64. It is implemented as __pure2 inline with non-volatile asm read from pcpu, which allows a compiler to cache its results. Convert most PCPU_GET(pcb) and curthread->td_pcb accesses into curpcb. Note that __curthread() uses magic value 0 as an offsetof(struct pcpu, pc_curthread). It seems to be done this way due to machine/pcpu.h needs to be processed before sys/pcpu.h, because machine/pcpu.h contributes machine-depended fields to the struct pcpu definition. As result, machine/pcpu.h cannot use struct pcpu yet. The __curpcb() also uses a magic constant instead of offsetof(struct pcpu, pc_curpcb) for the same reason. The constants are now defined as symbols and CTASSERTs are added to ensure that future KBI changes do not break the code. Requested and reviewed by: bde MFC after: 3 weeks |
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| include | ||
| linux32 | ||
| pci | ||
| Makefile | ||