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UPSTREAM: 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: fbe078d397b4 ("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>
(cherry picked from commit da83616bcd3fa84233f6e37e2cf8cbfa979c6927)
Bug: 187129171
Signed-off-by: Connor O'Brien <connoro@google.com>
Change-Id: I9e19b85b5ea81b1a0af3e835ed5f92c8a9c55765
This commit is contained in:
Arnd Bergmann
2021-02-25 15:34:49 +01:00
committed by Connor O'Brien
parent 9bf26f0ace
commit f107d073ce
1 changed files with 1 additions and 0 deletions
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1
scripts/lto-used-symbols.txt
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@@ -1,5 +1,6 @@
memcpy
memmove
memset
_mcount
__stack_chk_fail
__stack_chk_guard