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Date: Fri, 31 Oct 2008 18:24:11 +0000
From: Al Viro <viro@ZenIV.linux.org.uk>
To: Alexey Dobriyan <adobriyan@gmail.com>
Cc: mingo@elte.hu, linux-kernel@vger.kernel.org
Subject: Re: alpha: undefined reference to `save_stack_trace'
Message-ID: <20081031182411.GR28946@ZenIV.linux.org.uk>
References: <20081031165751.GA13558@x200.localdomain>
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On Fri, Oct 31, 2008 at 07:57:51PM +0300, Alexey Dobriyan wrote:
> On alpha-smp-[ny]-debug-y:
> 
>   LD      .tmp_vmlinux1
> kernel/built-in.o: In function `ftrace_trace_stack':
> (.text+0x706fc): undefined reference to `save_stack_trace'
> 
> 
> Somehow STACKTRACE is set despite no STACKTRACE_SUPPORT.

select blows, film at 11.  TRACING blindly selects STACKTRACE, with a bunch
of stuff in kernel/tracing/Kconfig doing select of TRACING.  Not just an alpha
problem, BTW.

FWIW, we probably ought to make scripts/kconfig/conf check if dependencies
are satisfied before writing .config out and scream bloody murder if they
are not.