6.1-stable review patch. If anyone has any objections, please let me know.
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From: Tiezhu Yang yangtiezhu@loongson.cn
commit da64a2359092ceec4f9dea5b329d0aef20104217 upstream.
When compiling on LoongArch, there exists the following objtool warning in arch/loongarch/kernel/machine_kexec.o:
kexec_reboot() falls through to next function crash_shutdown_secondary()
Avoid using unreachable() as it can (and will in the absence of UBSAN) generate fall-through code. Use BUG() so we get a "break BRK_BUG" trap (with unreachable annotation).
Cc: stable@vger.kernel.org # 6.12+ Acked-by: Josh Poimboeuf jpoimboe@kernel.org Signed-off-by: Tiezhu Yang yangtiezhu@loongson.cn Signed-off-by: Huacai Chen chenhuacai@loongson.cn Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- arch/loongarch/kernel/machine_kexec.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
--- a/arch/loongarch/kernel/machine_kexec.c +++ b/arch/loongarch/kernel/machine_kexec.c @@ -126,14 +126,14 @@ void kexec_reboot(void) /* All secondary cpus go to kexec_smp_wait */ if (smp_processor_id() > 0) { relocated_kexec_smp_wait(NULL); - unreachable(); + BUG(); } #endif
do_kexec = (void *)reboot_code_buffer; do_kexec(efi_boot, cmdline_ptr, systable_ptr, start_addr, first_ind_entry);
- unreachable(); + BUG(); }