ACK: [SRU][Q][PATCH 0/2] UBUNTU: [Config] Enable ARCH_HAVE_NMI_SAFE_CMPXCHG for riscv64

[Edoardo Canepa]

Acked-by: Edoardo Canepa <edoardo.canepa at canonical.com>

On 1/14/26 14:19, Sarah Emery wrote:
> BugLink: https://bugs.launchpad.net/bugs/2124276
>
> SRU Justification:
>
> [Impact]
>
> ftrace/kprobes tests are failing on riscv64, because of an upstream issue
> that was fixed in 6.18. A configuration key was missing, that allows
> the ftrace/kprobes subsystem to work correctly on riscv64.
>
> [Fix]
>
> Cherry picked commit 205cbc714842478df4239b5be205b9b459fd9fbc from upstream,
> and added relevant config annotations bringing back feature
> parity between riscv64 and other architectures around tracing subsystem.
>
> [Test Plan]
>
> Tested on local Q/N:linux-riscv VMs.
> linux-riscv is based on Questing linux for Questing and Noble.
>
> Executed ftrace/kprobes full test suite.
>
> [Where problems could occur]
>
> The now re-enabled ftrace/kprobes subsystem could have wrong behaviour. This would be low
> impact as it was previously completely disabled, and now the tests are passing.
>
> The configuration key could also affect other subsystems.
>
> [Other Info]
>
> This work was part of the shutdown squad effort to fix hinted tests.
>
> Pu Lehui (1):
>    riscv: Enable ARCH_HAVE_NMI_SAFE_CMPXCHG
>
> Sarah Emery (1):
>    UBUNTU: [Config] Enable ARCH_HAVE_NMI_SAFE_CMPXCHG for riscv64
>
>   arch/riscv/Kconfig               | 1 +
>   debian.master/config/annotations | 8 ++++----
>   2 files changed, 5 insertions(+), 4 deletions(-)
>
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