Re: fs/btrfs/delayed-ref.o: warning: objtool: add_delayed_ref+0x1ac: unreachable instruction

[Philip Li]

On Wed, Jul 24, 2024 at 03:02:29AM +0800, kernel test robot wrote:
> tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
> head:   28bbe4ea686a023929d907cc168430b61094811c
> commit: f75464f7bbbdd3bd63b91a1f023e26ef85e348c3 btrfs: unify the btrfs_add_delayed_*_ref helpers into one helper
> date:   3 months ago
> config: loongarch-randconfig-001-20240722 (https://download.01.org/0day-ci/archive/20240724/202407240323.OFy29s1f-lkp@xxxxxxxxx/config)
> compiler: loongarch64-linux-gcc (GCC) 14.1.0
> reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240724/202407240323.OFy29s1f-lkp@xxxxxxxxx/reproduce)
> 
> If you fix the issue in a separate patch/commit (i.e. not just a new version of
> the same patch/commit), kindly add following tags
> | Reported-by: kernel test robot <lkp@xxxxxxxxx>
> | Closes: https://lore.kernel.org/oe-kbuild-all/202407240323.OFy29s1f-lkp@xxxxxxxxx/
> 
> All warnings (new ones prefixed by >>):

Sorry, kindly ignore this report which could be related to tool chain upgrade to
loongarch64-linux-gcc (GCC) 14.1.0.

We will further check whether the issue can be reproduced on gcc-13.

> 
>    fs/btrfs/delayed-ref.o: warning: objtool: insert_delayed_ref+0x1cc: unreachable instruction
> >> fs/btrfs/delayed-ref.o: warning: objtool: add_delayed_ref+0x1ac: unreachable instruction
> 
> 
> objdump-func vmlinux.o add_delayed_ref:
> 
> -- 
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> https://github.com/intel/lkp-tests/wiki
>