Re: [PATCH v1] LoongArch: BPF: Make arch_protect_bpf_trampoline() return 0

[patchwork-bot+netdevbpf]

Hello:

This patch was applied to netdev/net.git (main)
by Huacai Chen <chenhuacai@xxxxxxxxxxx>:

On Tue, 10 Mar 2026 14:47:06 +0800 you wrote:
> Occasionally, there exists "text_copy_cb: operation failed" when executing
> bpf selftests, the reason is copy_to_kernel_nofault() failed and the ecode
> of estat register is 0x4 (PME: Page Modification Exception) due to the pte
> is not writeable, the root cause is that there is another place to set pte
> readonly which is in the generic weak arch_protect_bpf_trampoline().
> 
> There are two ways to fix this race condition issue, the direct way is to
> modify the generic weak arch_protect_bpf_trampoline() to add a mutex lock
> for set_memory_rox(), but the other simple and proper way is to just make
> arch_protect_bpf_trampoline() return 0 in the arch-specific code because
> LoongArch already uses BPF prog pack allocator for trampoline.
> 
> [...]

Here is the summary with links:
  - [v1] LoongArch: BPF: Make arch_protect_bpf_trampoline() return 0
    https://git.kernel.org/netdev/net/c/b254c629a963

You are awesome, thank you!
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