Nicholas Piggin writes:
> If the boot CPU tries to access per-cpu data of other CPUs before
> per cpu areas are set up, it will unexpectedly use offset 0.
>
> Try to catch such accesses by poisoning the __per_cpu_offset array.
I wasn't sure about this.
On bare metal it's just an instant checksto
If the boot CPU tries to access per-cpu data of other CPUs before
per cpu areas are set up, it will unexpectedly use offset 0.
Try to catch such accesses by poisoning the __per_cpu_offset array.
Signed-off-by: Nicholas Piggin
---
arch/powerpc/include/asm/percpu.h | 1 +
arch/powerpc/kernel/paca
