Messages in this thread | | | Date | Fri, 23 Aug 2019 11:24:27 -0300 | From | Jason Gunthorpe <> | Subject | Re: [PATCH] rdma/siw: Use proper enumerated type in map_cqe_status |
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On Thu, Jul 11, 2019 at 10:30:30AM -0700, Nathan Chancellor wrote: > On Thu, Jul 11, 2019 at 02:18:08PM -0300, Jason Gunthorpe wrote: > > On Thu, Jul 11, 2019 at 10:16:44AM -0700, Nick Desaulniers wrote: > > > On Thu, Jul 11, 2019 at 6:39 AM Jason Gunthorpe <jgg@ziepe.ca> wrote: > > > > > > > > On Thu, Jul 11, 2019 at 01:14:34AM -0700, Nathan Chancellor wrote: > > > > > Maybe time to start plumbing Clang into your test flow until it can get > > > > > intergrated with more CI setups? :) It can catch some pretty dodgy > > > > > behavior that GCC doesn't: > > > > > > > > I keep asking how to use clang to build the kernel and last I was told > > > > it still wasn't ready.. > > > > > > > > Is it ready now? Is there some flow that will compile with clang > > > > warning free, on any arch? (at least the portion of the kernel I check) > > > > > > $ make CC=clang ... > > > > > > Let us know if you find something we haven't already. > > > https://clangbuiltlinux.github.io/ > > > https://github.com/ClangBuiltLinux/linux/issues > > > > What clang version? > > > > Jason > > You'll need clang-9 for x86 because of the asm-goto requirement (or a > selective set of reverts for clang-8) but everything else should be > good with clang-8:
The latest clang-9 packages from apt.llvm.org do seem to build the kernel, I get one puzzling warning under RDMA:
drivers/infiniband/hw/hfi1/platform.o: warning: objtool: tune_serdes()+0x1f4: can't find jump dest instruction at .text+0x118a
And a BPF one:
kernel/bpf/core.o: warning: objtool: ___bpf_prog_run()+0xd: sibling call from callable instruction with modified stack frame
Jason
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