[tip:sched/core 44/47] kernel/exit.o: warning: objtool: do_exit() falls through to next function do_group_exit()

[kbuild test robot]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git sched/core
head:   a18a579e5f84daa74f64b1f1b652b4a6a8d6f8b4
commit: 9af6528ee9b682df7f29dbee86fbba0b67eab944 [44/47] sched/core: Optimize __schedule()
config: x86_64-randconfig-s1-09230134 (attached as .config)
compiler: gcc-4.4 (Debian 4.4.7-8) 4.4.7
reproduce:
        git checkout 9af6528ee9b682df7f29dbee86fbba0b67eab944
        # save the attached .config to linux build tree
        make ARCH=x86_64 

All warnings (new ones prefixed by >>):

>> kernel/exit.o: warning: objtool: do_exit() falls through to next function do_group_exit()

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