tracing: Have stack tracer compile when MCOUNT_INSN_SIZE is not defined
On some archs with some configurations, MCOUNT_INSN_SIZE is not defined, and
this makes the stack tracer fail to compile. Just define it to zero in this
case.
Link: https://lore.kernel.org/r/202001020219.zvE3vsty%lkp@intel.com
Cc: stable@vger.kernel.org
Fixes: 4df297129f
("tracing: Remove most or all of stack tracer stack size from stack_max_size")
Reported-by: kbuild test robot <lkp@intel.com>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
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@ -283,6 +283,11 @@ static void check_stack(unsigned long ip, unsigned long *stack)
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local_irq_restore(flags);
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}
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/* Some archs may not define MCOUNT_INSN_SIZE */
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#ifndef MCOUNT_INSN_SIZE
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# define MCOUNT_INSN_SIZE 0
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#endif
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static void
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stack_trace_call(unsigned long ip, unsigned long parent_ip,
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struct ftrace_ops *op, struct pt_regs *pt_regs)
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