In system_call_exception(), MSR_RI needs to also be checked on 8xx. Only book3e doesn't have MSR_RI.
On PPC32, MSR_PR is checked in real mode to avoid clobbering the stack, so no need to check and panic in system_call_exception(). Signed-off-by: Christophe Leroy <christophe.le...@c-s.fr> --- arch/powerpc/kernel/syscall.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/arch/powerpc/kernel/syscall.c b/arch/powerpc/kernel/syscall.c index dfd7b28239b8..f9fca9985b0f 100644 --- a/arch/powerpc/kernel/syscall.c +++ b/arch/powerpc/kernel/syscall.c @@ -34,9 +34,9 @@ notrace long system_call_exception(long r3, long r4, long r5, trace_hardirqs_off(); /* finish reconciling */ - if (IS_ENABLED(CONFIG_PPC_BOOK3S)) + if (!IS_ENABLED(CONFIG_PPC_BOOK3E)) BUG_ON(!(regs->msr & MSR_RI)); - BUG_ON(!(regs->msr & MSR_PR)); + BUG_ON(IS_ENABLED(CONFIG_PPC64) && !(regs->msr & MSR_PR)); BUG_ON(!FULL_REGS(regs)); BUG_ON(IS_ENABLED(CONFIG_PPC64) && get_softe(regs) != IRQS_ENABLED); -- 2.25.0