[PATCH v4] bpf, riscv: fix extable handling for arena load_acquire

[patchwork-bot+netdevbpf at kernel.org]

Hello:

This patch was applied to bpf/bpf-next.git (master)
by Kumar Kartikeya Dwivedi <memxor at gmail.com>:

On Mon, 20 Jul 2026 06:42:57 +0000 you wrote:
> emit_atomic_ld_st() returns 1 to have build_body() skip the zext after
> a sub-word load_acquire. The caller does "ret = ret ?:
> add_exception_handler(...)", which skips add_exception_handler() on any
> non-zero ret, so the extable entry is missing and a faulting
> PROBE_ATOMIC load_acquire oopses.
> 
> REG_DONT_CLEAR_MARKER leaves rd stale on fault, and the verifier still
> thinks the load overwrote it, so a program can leak it through a map.
> 
> [...]

Here is the summary with links:
  - [v4] bpf, riscv: fix extable handling for arena load_acquire
    https://git.kernel.org/bpf/bpf-next/c/5eb8921371c6

You are awesome, thank you!
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