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: 4df29712 ("tracing: Remove most or all of stack tracer stack size from stack_max_size")
Reported-by: default avatarkbuild test robot <lkp@intel.com>
Signed-off-by: default avatarSteven Rostedt (VMware) <rostedt@goodmis.org>
parent d2ccbccb
...@@ -283,6 +283,11 @@ static void check_stack(unsigned long ip, unsigned long *stack) ...@@ -283,6 +283,11 @@ static void check_stack(unsigned long ip, unsigned long *stack)
local_irq_restore(flags); local_irq_restore(flags);
} }
/* Some archs may not define MCOUNT_INSN_SIZE */
#ifndef MCOUNT_INSN_SIZE
# define MCOUNT_INSN_SIZE 0
#endif
static void static void
stack_trace_call(unsigned long ip, unsigned long parent_ip, stack_trace_call(unsigned long ip, unsigned long parent_ip,
struct ftrace_ops *op, struct pt_regs *pt_regs) struct ftrace_ops *op, struct pt_regs *pt_regs)
......
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment