On Thu, Jan 18, 2018 at 02:59:50PM +0100, Greg Kroah-Hartman wrote: > On Wed, Jan 17, 2018 at 01:49:07PM -0800, Guenter Roeck wrote: > > Hi Greg, > > > > please add the following patches to v4.14.y. > > > > ce90aaf5cde4 objtool: Fix seg fault with clang-compiled objects > > e7e83dd3ff1d objtool: Fix Clang enum conversion warning > > 0f908ccbeca9 tools/objtool/Makefile: don't assume sync-check.sh is executable > > d89e426499cf objtool: Fix seg fault caused by missing parameter > > > > They are needed to avoid problems when building v4.14.y with clang. > > It might be useful to apply the same patches to older kernels > > if/when retpoline related changes are applied to those kernels. > > From what I can tell, these only are needed for 4.14, the 4.9 and 4.4 > backports of repoline didn't backport the huge objtool changes to ORC. > So hopefully it's all good there, otherwise I'm sure someone from the > Android team will complain I broke building with CLANG :) > Unfortunately, the problem is much worse: The Google toolchain with retpoline support causes a crash with the latest version of objtool. No idea if that is an objtool problem or a compiler problem; it was introduced with 'objtool: Allow alternatives to be ignored'. You might also want to add 2a0098d70640 objtool: Fix seg fault with gold linker but that has a Fixes: tag and might be in your queue already. Thanks, Guenter