On 3/31/15 5:38 PM, David Miller wrote:
What is different in the PowerPC fault path vs. the Sparc one that causes the SIGBUS for sparc where the PowerPC does not see it? I don't understand where the SIGBUS comes from. In a pagefault disable section on sparc, in_atomic() should be true, thus we'll call do_kernel_fault(), fall through to the TSTATE_PRIV code path and simply run the exception handler.
That's what I was hoping someone could explain to me. I'll dig deeper on Monday.
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