Hello:
This patch was applied to bpf/bpf-next.git (master)
by Alexei Starovoitov <ast@xxxxxxxxxx>:
On Wed, 7 Dec 2022 11:35:40 +0100 you wrote:
> From: Björn Töpel <bjorn@xxxxxxxxxxxx>
>
> In BPF all global functions, and BPF helpers return a 64-bit
> value. For kfunc calls, this is not the case, and they can return
> e.g. 32-bit values.
>
> The return register R0 for kfuncs calls can therefore be marked as
> subreg_def != DEF_NOT_SUBREG. In general, if a register is marked with
> subreg_def != DEF_NOT_SUBREG, some archs (where bpf_jit_needs_zext()
> returns true) require the verifier to insert explicit zero-extension
> instructions.
>
> [...]
Here is the summary with links:
- [bpf,v2] bpf: Do not zero-extend kfunc return values
https://git.kernel.org/bpf/bpf-next/c/d35af0a7feb0
You are awesome, thank you!
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