Re: [PATCH v4 14/23] powerpc/syscall: Save r3 in regs->orig_r3

[Christophe Leroy]

Le 26/01/2021 à 11:18, Nicholas Piggin a écrit :
> Excerpts from Christophe Leroy's message of January 26, 2021 12:48 am:
> > Save r3 in regs->orig_r3 in system_call_exception()
> >
> > Signed-off-by: Christophe Leroy <christophe.leroy@xxxxxxxxxx>
> > ---
> >   arch/powerpc/kernel/entry_64.S | 1 -
> >   arch/powerpc/kernel/syscall.c  | 2 ++
> >   2 files changed, 2 insertions(+), 1 deletion(-)
> >
> > diff --git a/arch/powerpc/kernel/entry_64.S b/arch/powerpc/kernel/entry_64.S
> > index aa1af139d947..a562a4240aa6 100644
> > --- a/arch/powerpc/kernel/entry_64.S
> > +++ b/arch/powerpc/kernel/entry_64.S
> > @@ -278,7 +278,6 @@ END_BTB_FLUSH_SECTION
> >   	std	r10,_LINK(r1)
> >   	std	r11,_TRAP(r1)
> >   	std	r12,_CCR(r1)
> > -	std	r3,ORIG_GPR3(r1)
> >   	addi	r10,r1,STACK_FRAME_OVERHEAD
> >   	ld	r11,exception_marker@toc(r2)
> >   	std	r11,-16(r10)		/* "regshere" marker */
>
> This misses system_call_vectored.

Oops yes, this patch was cooked before SCV where introduced. Fixes in v5.

Thanks
Christophe