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
