On Wed, Dec 23, 2020 at 12:06:07PM -0800, Randy Dunlap wrote:
> On 12/21/20 9:03 PM, Paul E. McKenney wrote:
> > On Tue, Dec 22, 2020 at 11:24:22AM +0800, kernel test robot wrote:
> > > tree:
> > > https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
> > > head: 8653b778e454a7708847aeafe689bce07aeeb94e
> > > commit: b38f57c1fe64276773b124dffb0a139cc32ab3cb rcu-tasks: Allow
> > > rcu_read_unlock_trace() under scheduler locks
> > > date: 8 months ago
> > > config: h8300-randconfig-s032-20201220 (attached as .config)
> > > compiler: h8300-linux-gcc (GCC) 9.3.0
> > > reproduce:
> > > wget
> > > https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross
> > > -O ~/bin/make.cross
> > > chmod +x ~/bin/make.cross
> > > # apt-get install sparse
> > > # sparse version: v0.6.3-184-g1b896707-dirty
> > > #
> > > https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=b38f57c1fe64276773b124dffb0a139cc32ab3cb
> > > git remote add linus
> > > https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
> > > git fetch --no-tags linus master
> > > git checkout b38f57c1fe64276773b124dffb0a139cc32ab3cb
> > > # save the attached .config to linux build tree
> > > COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross
> > > C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=h8300
> > >
> > > If you fix the issue, kindly add following tag as appropriate
> > > Reported-by: kernel test robot <[email protected]>
> > >
> > > All errors (new ones prefixed by >>):
> > >
> > > h8300-linux-ld: section .init.text LMA
> > > [000000000043a160,0000000000452569] overlaps section .rodata LMA
> > > [00000000003ff420,000000000047df2f]
> > > h8300-linux-ld: section .data VMA [0000000000400000,000000000043a15f]
> > > overlaps section .rodata VMA [00000000003ff420,000000000047df2f]
> > > h8300-linux-ld: section __ksymtab VMA
> > > [000000000047df30,000000000048611f] overlaps section .bss VMA
> > > [000000000045ebd0,000000000056a053]
> > > h8300-linux-ld: kernel/rcu/update.o: in function
> > > `rcu_read_unlock_trace_special':
> > > > > update.c:(.text+0x8f9): undefined reference to `irq_work_queue'
> >
> > Does the patch below help?
> >
> > Thanx, Paul
> >
> > ------------------------------------------------------------------------
> >
> > commit cb7220ed05190c9a92df95b52a21525a7e08a449
> > Author: Paul E. McKenney <[email protected]>
> > Date: Mon Dec 21 21:00:18 2020 -0800
> >
> > rcu: Make TASKS_TRACE_RCU select IRQ_WORK
> > Tasks Trace RCU uses irq_work_queue() to safely awaken its grace-period
> > kthread, so this commit therefore causes the TASKS_TRACE_RCU Kconfig
> > option select the IRQ_WORK Kconfig option.
> > Reported-by: kernel test robot <[email protected]>
> > Signed-off-by: Paul E. McKenney <[email protected]>
> >
> > diff --git a/kernel/rcu/Kconfig b/kernel/rcu/Kconfig
> > index aa8cc8c9..3128b7c 100644
> > --- a/kernel/rcu/Kconfig
> > +++ b/kernel/rcu/Kconfig
> > @@ -95,6 +95,7 @@ config TASKS_RUDE_RCU
> > config TASKS_TRACE_RCU
> > def_bool 0
> > + select IRQ_WORK
> > help
> > This option enables a task-based RCU implementation that uses
> > explicit rcu_read_lock_trace() read-side markers, and allows
> >
>
> WorksForMe. Thanks.
>
> Acked-by: Randy Dunlap <[email protected]> # build-tested
Thank you, I will apply on my next rebase.
Thanx, Paul
