Hi, I recently booted my Wii again, and I noticed a regression at boot time. Output stops after the "Finalizing device tree... flat tree at 0xXXXXXX" message. I bisected it to this commit in the 5.8 development cycle:
commit 7c95d8893fb55869882c9f68f4c94840dc43f18f Author: Jordan Niethe <[email protected]> Date: Wed May 6 13:40:25 2020 +1000 powerpc: Change calling convention for create_branch() et. al. create_branch(), create_cond_branch() and translate_branch() return the instruction that they create, or return 0 to signal an error. Separate these concerns in preparation for an instruction type that is not just an unsigned int. Fill the created instruction to a pointer passed as the first parameter to the function and use a non-zero return value to signify an error. Signed-off-by: Jordan Niethe <[email protected]> Signed-off-by: Michael Ellerman <[email protected]> Reviewed-by: Alistair Popple <[email protected]> Link: https://lore.kernel.org/r/[email protected] arch/powerpc/include/asm/code-patching.h | 12 +-- arch/powerpc/kernel/optprobes.c | 24 +++--- arch/powerpc/kernel/setup_32.c | 4 +- arch/powerpc/kernel/trace/ftrace.c | 24 +++--- arch/powerpc/lib/code-patching.c | 134 ++++++++++++++++++------------- arch/powerpc/lib/feature-fixups.c | 5 +- 6 files changed, 119 insertions(+), 84 deletions(-) Do you have any hints on how to debug and/or fix this issue? Best regards, Jonathan Neuschäfer
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