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kbuild: lto: add _mcount to list of used symbols

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Some randconfig builds fail with undefined references to _mcount
when CONFIG_TRIM_UNUSED_KSYMS is set:

ERROR: modpost: "_mcount" [drivers/tee/optee/optee.ko] undefined!
ERROR: modpost: "_mcount" [drivers/fsi/fsi-occ.ko] undefined!
ERROR: modpost: "_mcount" [drivers/fpga/dfl-pci.ko] undefined!

Since there is already a list of symbols that get generated at link
time, add this one as well.

Fixes: fbe078d397 ("kbuild: lto: add a default list of used symbols")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
This commit is contained in:
Arnd Bergmann 2021-02-25 15:34:49 +01:00 committed by Masahiro Yamada
parent 3fb6d0e00e
commit da83616bcd
1 changed files with 1 additions and 0 deletions
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1
scripts/lto-used-symbollist.txt
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@ -1,5 +1,6 @@
memcpy
memmove
memset
_mcount
__stack_chk_fail
__stack_chk_guard