Hi Petr,

On Fri, 2 Mar 2018 16:54:54 +0100 Petr Mladek <pmla...@suse.com> wrote:
>
> It is a mistery to me. The error appears when I move any of
> dump_stack_print_info() or show_regs_print_info() function
> definitions from kernel/printk/printk.c to lib/dump_stack.c.
> All the other changes seems unrelated.

Presumably because the Blackfin dumpstack() calls
dump_stack_print_info() so if you move that into lib/dumpstack.o, then
that file is dragged in and it contains another copy of dumpstack().

-- 
Cheers,
Stephen Rothwell

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