I would suggest the following for this hunk: + ldil L%intr_restore, %r2 + BL preempt_schedule_irq + ldo R%intr_restore(%r2), %r2 ldil L%intr_restore, %r1 b,l preempt_schedule_irq,%r2 ldo R%intr_restore(%r1), %r2 On PA 2.0 hardware that gives a 22-bit call. Dave On 2021-01-25 3:59 p.m., Helge Deller wrote: > 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 */ >> >> /* >> >> -- John David Anglin dave.anglin@xxxxxxxx
