Re: [PATCH linux-next] bpf: fix warning for crash_kexec

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On 02/09/24 at 06:05pm, Hari Bathini wrote:
> With [1], CONFIG_KEXEC & !CONFIG_CRASH_DUMP is supported but that led
> to the below warning:
> 
>   "WARN: resolve_btfids: unresolved symbol crash_kexec"
> 
> Fix it by using the appropriate #ifdef.
> 
> [1] https://lore.kernel.org/all/20240124051254.67105-1-bhe@xxxxxxxxxx/
> 
> Signed-off-by: Hari Bathini <hbathini@xxxxxxxxxxxxx>
> ---

Good catch, thanks for fixing it.

Acked-by: Baoquan He <bhe@xxxxxxxxxx>

>  kernel/bpf/helpers.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/kernel/bpf/helpers.c b/kernel/bpf/helpers.c
> index 4db1c658254c..e408d1115e26 100644
> --- a/kernel/bpf/helpers.c
> +++ b/kernel/bpf/helpers.c
> @@ -2545,7 +2545,7 @@ __bpf_kfunc void bpf_throw(u64 cookie)
>  __bpf_kfunc_end_defs();
>  
>  BTF_KFUNCS_START(generic_btf_ids)
> -#ifdef CONFIG_KEXEC_CORE
> +#ifdef CONFIG_CRASH_DUMP
>  BTF_ID_FLAGS(func, crash_kexec, KF_DESTRUCTIVE)
>  #endif
>  BTF_ID_FLAGS(func, bpf_obj_new_impl, KF_ACQUIRE | KF_RET_NULL)
> -- 
> 2.43.0
> 


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