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Nick Piggin wrote: >> >> This should work because the result gets used before reading again: >> >> read_cr3(a); >> write_cr3(a | 1); >> read_cr3(a); >> >> But this might be reordered so that b gets read before the write: >> >> read_cr3(a); >> write_cr3(a | 1); >> read_cr3(b); >> >> ? > > I don't see how, as write_cr3 clobbers memory. Because read_cr3() doesn't depend on memory, and b could be stored in a register. -hpa - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/ | ||||||||||
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