Re: [kbuild-all] [f2fs:dev-test 63/64] fs/ext4/readpage.o: warning: objtool: mpage_end_io()+0x53: function has unreachable instruction

Re: [kbuild-all] [f2fs:dev-test 63/64] fs/ext4/readpage.o: warning: objtool: mpage_end_io()+0x53: function has unreachable instruction

[Fengguang Wu]

Hi Jaegeuk,

Sorry please ignore this one -- it looks like false warning from old
gcc 4.4 and 4.6 -- we just enabled old compiler tests triggered
thousands of these warnings..

Thanks,
Fengguang

On Tue, Jul 19, 2016 at 10:52:50PM +0800, kbuild test robot wrote:
>tree:   https://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs.git dev-test
>head:   c316708435b53448aee2ecec63fcfe495c2a49a9
>commit: 99c6af120d9f452ace3d8712b5ec54fac9b3a3ea [63/64] ext4 crypto: migrate into vfs's crypto engine
>config: x86_64-randconfig-a0-07191719 (attached as .config)
>compiler: gcc-4.4 (Debian 4.4.7-8) 4.4.7
>reproduce:
>        git checkout 99c6af120d9f452ace3d8712b5ec54fac9b3a3ea
>        # save the attached .config to linux build tree
>        make ARCH=x86_64
>
>All warnings (new ones prefixed by >>):
>
>>> fs/ext4/readpage.o: warning: objtool: mpage_end_io()+0x53: function has unreachable instruction
>
>---
>0-DAY kernel test infrastructure                Open Source Technology Center
>https://lists.01.org/pipermail/kbuild-all                   Intel Corporation


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