Re: [PATCH] perf unwind-libdw: Fix stale object reference in arch/loongarch

[Ian Rogers]

On Sun, Apr 19, 2026 at 2:08 AM Icenowy Zheng <zhengxingda@xxxxxxxxxxx> wrote:
>
> The arch/loongarch/util/unwind-libdw.c file is already moved to util/,
> but the Build statement for it is forgot to be removed.
>
> Remove the stale Build statement.
>
> This fixes the build failure of perf tool in kernel v7.0 on LoongArch.
>
> Fixes: e62fae9d9e85 ("perf unwind-libdw: Fix a cross-arch unwinding bug")
> Signed-off-by: Icenowy Zheng <zhengxingda@xxxxxxxxxxx>
> Cc: stable@xxxxxxxxxxxxxxx

I think this is already fixed:
https://web.git.kernel.org/pub/scm/linux/kernel/git/perf/perf-tools-next.git/commit/?h=perf-tools-next
I also sent out a fix, fwiw:
https://lore.kernel.org/linux-perf-users/20260305221927.3237145-3-irogers@xxxxxxxxxx/

Thanks,
Ian

> ---
>  tools/perf/arch/loongarch/util/Build | 1 -
>  1 file changed, 1 deletion(-)
>
> diff --git a/tools/perf/arch/loongarch/util/Build b/tools/perf/arch/loongarch/util/Build
> index 3ad73d0289f3e..8d91e78d31c94 100644
> --- a/tools/perf/arch/loongarch/util/Build
> +++ b/tools/perf/arch/loongarch/util/Build
> @@ -1,4 +1,3 @@
>  perf-util-y += header.o
>
>  perf-util-$(CONFIG_LOCAL_LIBUNWIND) += unwind-libunwind.o
> -perf-util-$(CONFIG_LIBDW_DWARF_UNWIND) += unwind-libdw.o
> --
> 2.52.0
>