net/core/skbuff.o: warning: objtool: __skb_to_sgvec+0x1dc: unreachable instruction

[kernel test robot]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   933069701c1b507825b514317d4edd5d3fd9d417
commit: 0ca84aeaee150796d4b5577b1b0ae52a947e7813 LoongArch: Make {virt, phys, page, pfn} translation work with KFENCE
date:   3 months ago
config: loongarch-randconfig-001-20240722 (https://download.01.org/0day-ci/archive/20240722/202407222319.y5uEZ4K6-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/20240722/202407222319.y5uEZ4K6-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/202407222319.y5uEZ4K6-lkp@xxxxxxxxx/

All warnings (new ones prefixed by >>):

>> net/core/skbuff.o: warning: objtool: __skb_to_sgvec+0x1dc: unreachable instruction
   net/core/skbuff.o: warning: objtool: pskb_expand_head+0x68: unreachable instruction
   net/core/skbuff.o: warning: objtool: skb_segment+0x41c: unreachable instruction
   net/core/skbuff.o: warning: objtool: skb_shift+0x50: unreachable instruction


objdump-func vmlinux.o __skb_to_sgvec:

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