One cannot ftrace functions used to setup ftrace. Doing so leads to a racy kernel panic as observed by users on SiFive HiFive Unmatched boards with Ubuntu kernels. This has been debugged and fixed in v5.12 kernels by ensuring that all sbi functions are excluded from ftrace. Link: https://forums.sifive.com/t/u-boot-says-unhandled-exception-illegal-instruction/4898/12 BugLink: https://bugs.launchpad.net/bugs/1934548 Guo Ren (2): riscv: Fixup wrong ftrace remove cflag riscv: Fixup patch_text panic in ftrace arch/riscv/kernel/Makefile | 5 +++-- arch/riscv/mm/Makefile | 3 ++- 2 files changed, 5 insertions(+), 3 deletions(-) -- 2.30.2
