Le 14/05/2025 à 04:06, Paul Mackerras a écrit : > On Sun, May 11, 2025 at 06:32:25PM +0530, Madhavan Srinivasan wrote: >> >> Can you try with this patch, I am testing this in my setup. >> >> Maddy >> >> >> diff --git a/arch/powerpc/kernel/irq.c b/arch/powerpc/kernel/irq.c >> index a0e8b998c9b5..2ce7a4f2b2fb 100644 >> --- a/arch/powerpc/kernel/irq.c >> +++ b/arch/powerpc/kernel/irq.c >> @@ -276,7 +276,11 @@ static __always_inline void call_do_irq(struct pt_regs >> *regs, void *sp) >> [callee] "i" (__do_irq) >> : // Clobbers >> "lr", "xer", "ctr", "memory", "cr0", "cr1", "cr5", "cr6", >> +#if __GNUC__ >= 15 >> + "cr7", "r0", "r2", "r4", "r5", "r6", "r7", "r8", "r9", >> "r10", >> +#else >> "cr7", "r0", "r4", "r5", "r6", "r7", "r8", "r9", "r10", >> +#endif >> "r11", "r12" >> ); >> } > > That works as long as I have CONFIG_PPC_KERNEL_PCREL enabled, but with > it disabled, it fails to compile. With PCREL disabled, the kernel > runs just fine without the r2 clobber. I guess it needs to be: > > #if __GNUC__ >= 15 && IS_ENABLED(CONFIG_PPC_KERNEL_PCREL) > > or something like that. >
I have now done some tests with both gcc 14 and gcc 15 and they behave the same, so at the end I think all we need is: #ifdef CONFIG_PPC_KERNEL_PCREL without any mention to GCC version.
