On Fri, 19 Mar 2021 16:53:23 +0000, Andre Przywara wrote:

When trying to run the arm64 MTE (Memory Tagging Extension) selftests
on a model with the new FEAT_MTE3 capability, the MTE feature detection
failed, because it was overzealously checking for one exact feature
version only (0b0010). Trying to fix that (patch 06/11) led me into the
rabbit hole of userland tool compilation, which triggered patches
01-05/11, to let me actually compile the selftests on an arm64
machine running Ubuntu 20.04. Before I actually fixed that, I tried some
other compiler and distro; patches 07 and 08 are my witnesses.
Then I got brave and tried clang: entering patches 09/11 and 10/11.
Eventually I tried to run the whole thing on that model again, and,
you guessed it, patch 11/11 concludes this apparent "2 minute job".

[...]

Applied to arm64 (for-next/kselftest), thanks!

[01/11] kselftest/arm64: mte: Fix compilation with native compiler
        https://git.kernel.org/arm64/c/4a423645bc26
[02/11] kselftest/arm64: mte: Fix pthread linking
        https://git.kernel.org/arm64/c/e5decefd884d
[03/11] kselftest/arm64: mte: ksm_options: Fix fscanf warning
        https://git.kernel.org/arm64/c/31c88729a7ad
[04/11] kselftest/arm64: mte: user_mem: Fix write() warning
        https://git.kernel.org/arm64/c/40de85226fec
[05/11] kselftest/arm64: mte: common: Fix write() warnings
        https://git.kernel.org/arm64/c/4dfc9d30a8ab
[06/11] kselftest/arm64: mte: Fix MTE feature detection
        https://git.kernel.org/arm64/c/b17f265bb4cc
[07/11] kselftest/arm64: mte: Use cross-compiler if specified
        https://git.kernel.org/arm64/c/28cc9b3d8996
[08/11] kselftest/arm64: mte: Output warning about failing compiler
        https://git.kernel.org/arm64/c/6b9bbb7f934d
[09/11] kselftest/arm64: mte: Makefile: Fix clang compilation
        https://git.kernel.org/arm64/c/adb73140eec7
[10/11] kselftest/arm64: mte: Fix clang warning
        https://git.kernel.org/arm64/c/005a62f6d269
[11/11] kselftest/arm64: mte: Report filename on failing temp file creation
        https://git.kernel.org/arm64/c/b4985bb88afb

-- 
Catalin


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