drivers/staging/lustre/lnet/libcfs/tracefile.o: warning: objtool: cfs_tracefile_dump_all_pages()+0x27a: unreachable instruction

[kbuild test robot]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   e365806ac289457263a133bd32df8df49897f612
commit: 39358a033b2e4432052265c1fa0f36f572d8cfb5 objtool, x86: Add facility for asm code to provide unwind hints
date:   2 months ago
config: x86_64-randconfig-a0-09261057 (attached as .config)
compiler: gcc-4.4 (Debian 4.4.7-8) 4.4.7
reproduce:
        git checkout 39358a033b2e4432052265c1fa0f36f572d8cfb5
        # save the attached .config to linux build tree
        make ARCH=x86_64 

All warnings (new ones prefixed by >>):

>> drivers/staging/lustre/lnet/libcfs/tracefile.o: warning: objtool: cfs_tracefile_dump_all_pages()+0x27a: unreachable instruction

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