dump_stack() is a useful tool to understand call procedure of a function. You can enable it in the kernel source.

Enable dump_stack

Make sure the following flag is y

• CONFIG_PREEMPT
• CONFIG_DEBUG_KERNEL
• CONFIG_KALLSYMS
• CONFIG_SPINLOCK_SLEEP
• CONFIG_MAGIC_SYSRQ

Use dump_stack in your code

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printk(KERN_ERR, "%x", parameter);
dump_stack()

After that

You can watch the stack result in dmesg