On 1/25/21 9:47 PM, Helge Deller wrote: >>>> On Sat, Jan 16, 2021 at 6:37 AM kernel test robot <lkp@xxxxxxxxx> wrote: >>>>> tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master >>>>> head: 1d94330a437a573cfdf848f6743b1ed169242c8a >>>>> commit: eff8728fe69880d3f7983bec3fb6cea4c306261f vmlinux.lds.h: Add PGO and AutoFDO input sections >>>>> date: 5 months ago >>>>> config: parisc-randconfig-r032-20210116 (attached as .config) >>>>> compiler: hppa64-linux-gcc (GCC) 9.3.0 >>>>> reproduce (this is a W=1 build): >>>>> wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross >>>>> chmod +x ~/bin/make.cross >>>>> # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=eff8728fe69880d3f7983bec3fb6cea4c306261f >>>>> git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git >>>>> git fetch --no-tags linus master >>>>> git checkout eff8728fe69880d3f7983bec3fb6cea4c306261f >>>>> # save the attached .config to linux build tree >>>>> COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=parisc >>>>> >>>>> If you fix the issue, kindly add following tag as appropriate >>>>> Reported-by: kernel test robot <lkp@xxxxxxxxx> >>>>> >>>>> All errors (new ones prefixed by >>): >>>>> >>>>> hppa64-linux-ld: mm/page_alloc.o(.ref.text+0x110): cannot reach unknown >>>>> hppa64-linux-ld: mm/memblock.o(.text+0x27c): cannot reach __warn_printk >>>>> hppa64-linux-ld: mm/memblock.o(.meminit.text+0xc4): cannot reach printk > .... > > The problem with this .config is, that both CONFIG_MODULES and > CONFIG_MLONGCALLS are set to "n". > The Kconfig autodetection needs fixing to enable CONFIG_MLONGCALLS in > this case. > > > This patch fixes it for me: > > [PATCH] Require -mlong-calls gcc option for !CONFIG_MODULES > > When building a kernel without module support, the CONFIG_MLONGCALL > option needs to be enabled. This patch fixes the autodetection in the > Kconfig script and uses a far call to preempt_schedule_irq() in > intr_do_preempt(). > > Signed-off-by: Helge Deller <deller@xxxxxx> > Reported-by: kernel test robot <lkp@xxxxxxxxx> There's a small bug in the code below: BL preempt_schedule_irq needs to be BL preempt_schedule_irq, %r0 I'll do some more testing and will push the final version through the parisc tree. Helge > --- > > diff --git a/arch/parisc/Kconfig b/arch/parisc/Kconfig > index 78b17621ee4a..278462186ac4 100644 > --- a/arch/parisc/Kconfig > +++ b/arch/parisc/Kconfig > @@ -202,9 +202,8 @@ config PREFETCH > depends on PA8X00 || PA7200 > > config MLONGCALLS > - bool "Enable the -mlong-calls compiler option for big kernels" > - default y if !MODULES || UBSAN || FTRACE > - default n > + def_bool y if !MODULES || UBSAN || FTRACE > + bool "Enable the -mlong-calls compiler option for big kernels" if MODULES && !UBSAN && !FTRACE > depends on PA8X00 > help > If you configure the kernel to include many drivers built-in instead > diff --git a/arch/parisc/kernel/entry.S b/arch/parisc/kernel/entry.S > index beba9816cc6c..6320f6a8397c 100644 > --- a/arch/parisc/kernel/entry.S > +++ b/arch/parisc/kernel/entry.S > @@ -997,10 +997,19 @@ intr_do_preempt: > bb,<,n %r20, 31 - PSW_SM_I, intr_restore > nop > > - BL preempt_schedule_irq, %r2 > - nop > + /* ssm PSW_SM_I done later in intr_restore */ > +#ifdef CONFIG_MLONGCALLS > + ldil L%intr_restore, %r2 > + load32 preempt_schedule_irq, %r1 > + bv %r0(%r1) > + ldo R%intr_restore(%r2), %r2 > +#else > + ldil L%intr_restore, %r2 > + BL preempt_schedule_irq > + ldo R%intr_restore(%r2), %r2 > +#endif > + > > - b,n intr_restore /* ssm PSW_SM_I done by intr_restore */ > #endif /* CONFIG_PREEMPTION */ > > /* > >
