ARC: stack unwinder to bail if PC is not kernel mode
Currently, it doesn't invoke the callback but continues to unwind Also while at it - simplify the code a bit Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
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@ -122,19 +122,17 @@ arc_unwind_core(struct task_struct *tsk, struct pt_regs *regs,
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while (1) {
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address = UNW_PC(&frame_info);
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if (address && __kernel_text_address(address)) {
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if (consumer_fn(address, arg) == -1)
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break;
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}
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if (!address || !__kernel_text_address(address))
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break;
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if (consumer_fn(address, arg) == -1)
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break;
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ret = arc_unwind(&frame_info);
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if (ret == 0) {
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frame_info.regs.r63 = frame_info.regs.r31;
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continue;
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} else {
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if (ret)
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break;
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}
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frame_info.regs.r63 = frame_info.regs.r31;
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}
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return address; /* return the last address it saw */
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