Re: [PATCH] kbuild: lto: add _mcount to list of used symbols
From: Kees Cook
Date: Thu Feb 25 2021 - 15:15:44 EST
On Thu, Feb 25, 2021 at 03:34:49PM +0100, Arnd Bergmann wrote:
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From: Arnd Bergmann <arnd@xxxxxxxx>
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Some randconfig builds fail with undefined references to _mcount
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when CONFIG_TRIM_UNUSED_KSYMS is set:
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ERROR: modpost: "_mcount" [drivers/tee/optee/optee.ko] undefined!
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ERROR: modpost: "_mcount" [drivers/fsi/fsi-occ.ko] undefined!
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ERROR: modpost: "_mcount" [drivers/fpga/dfl-pci.ko] undefined!
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Since there is already a list of symbols that get generated at link
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time, add this one as well.
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Fixes: fbe078d397b4 ("kbuild: lto: add a default list of used symbols")
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Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx>
Thanks!
Reviewed-by: Kees Cook <keescook@xxxxxxxxxxxx>
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Kees Cook