On Thu, Apr 15, 2021 at 7:02 AM Catalin Marinas <catalin.mari...@arm.com> wrote: > > On Thu, Apr 15, 2021 at 06:25:57AM -0700, Nathan Chancellor wrote: > > On Thu, Apr 15, 2021 at 10:17:43AM +0100, Catalin Marinas wrote: > > > On Tue, Apr 13, 2021 at 05:08:04PM -0700, Nathan Chancellor wrote: > > > > After commit 2decad92f473 ("arm64: mte: Ensure TIF_MTE_ASYNC_FAULT is > > > > set atomically"), LLVM's integrated assembler fails to build entry.S: > > > > > > > > <instantiation>:5:7: error: expected assembly-time absolute expression > > > > .org . - (664b-663b) + (662b-661b) > > > > ^ > > > > <instantiation>:6:7: error: expected assembly-time absolute expression > > > > .org . - (662b-661b) + (664b-663b) > > > > ^ > > > > > > I tried the latest Linus' tree and linux-next (defconfig) with this > > > commit in and I can't get your build error. I used both clang-10 from > > > Debian stable and clang-11 from Debian sid. So, which clang version did > > > you use or which kernel config options? > > > > Interesting, this reproduces for me with LLVM 12 or newer with just > > defconfig. > > It fails for me as well with clang-12. Do you happen to know why it > works fine with previous clang versions?
It looks like CONFIG_ARM64_AS_HAS_MTE is not set when we use the integrated assembler with LLVM 11, and the code that breaks later versions is gated behind CONFIG_ARM64_MTE. Sami