Re: [PATCH v9 01/16] tracing: move function tracer options to Kconfig (causing parisc build failures)
From: Kees Cook
Date: Wed Feb 24 2021 - 15:40:06 EST
On Wed, Feb 24, 2021 at 12:17:23PM -0800, Guenter Roeck wrote:
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On Fri, Dec 11, 2020 at 10:46:18AM -0800, Sami Tolvanen wrote:
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> Move function tracer options to Kconfig to make it easier to add
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> new methods for generating __mcount_loc, and to make the options
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> available also when building kernel modules.
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>
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> Note that FTRACE_MCOUNT_USE_* options are updated on rebuild and
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> therefore, work even if the .config was generated in a different
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> environment.
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> Signed-off-by: Sami Tolvanen <samitolvanen@xxxxxxxxxx>
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> Acked-by: Steven Rostedt (VMware) <rostedt@xxxxxxxxxxx>
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With this patch in place, parisc:allmodconfig no longer builds.
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Error log:
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Arch parisc is not supported with CONFIG_FTRACE_MCOUNT_RECORD at scripts/recordmcount.pl line 405.
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make[2]: *** [scripts/mod/empty.o] Error 2
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Due to this problem, CONFIG_FTRACE_MCOUNT_RECORD can no longer be
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enabled in parisc builds. Since that is auto-selected by DYNAMIC_FTRACE,
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DYNAMIC_FTRACE can no longer be enabled, and with it everything that
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depends on it.
Ew. Any idea why this didn't show up while it was in linux-next?
--
Kees Cook