forked from Minki/linux
s390/stacktrace: fix address ranges for asynchronous and panic stack
git commitdc7ee00d47
("s390: lowcore stack pointer offsets") introduced a regression in regard to save_stack_trace(). The stack pointer for the asynchronous and the panic stack in the lowcore now have an additional offset applied to them. This offset needs to be taken into account in the calculation for the low and high address for the stacks. This bug was already partially fixed with9cc5c206d9
("s390/dumpstack: fix address ranges for asynchronous and panic stack"). This patch fixes it also for the stacktrace code. Fixes:dc7ee00d47
("s390: lowcore stack pointer offsets") Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Tested-by: Peter Oberparleiter <oberpar@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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@ -62,17 +62,18 @@ static unsigned long save_context_stack(struct stack_trace *trace,
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void save_stack_trace(struct stack_trace *trace)
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void save_stack_trace(struct stack_trace *trace)
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{
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{
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register unsigned long sp asm ("15");
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register unsigned long sp asm ("15");
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unsigned long orig_sp, new_sp;
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unsigned long orig_sp, new_sp, frame_size;
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frame_size = STACK_FRAME_OVERHEAD + sizeof(struct pt_regs);
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orig_sp = sp;
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orig_sp = sp;
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new_sp = save_context_stack(trace, orig_sp,
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new_sp = save_context_stack(trace, orig_sp,
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S390_lowcore.panic_stack - PAGE_SIZE,
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S390_lowcore.panic_stack + frame_size - PAGE_SIZE,
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S390_lowcore.panic_stack, 1);
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S390_lowcore.panic_stack + frame_size, 1);
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if (new_sp != orig_sp)
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if (new_sp != orig_sp)
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return;
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return;
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new_sp = save_context_stack(trace, new_sp,
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new_sp = save_context_stack(trace, new_sp,
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S390_lowcore.async_stack - ASYNC_SIZE,
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S390_lowcore.async_stack + frame_size - ASYNC_SIZE,
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S390_lowcore.async_stack, 1);
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S390_lowcore.async_stack + frame_size, 1);
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if (new_sp != orig_sp)
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if (new_sp != orig_sp)
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return;
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return;
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save_context_stack(trace, new_sp,
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save_context_stack(trace, new_sp,
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