Re: [PATCH] tools/dma: fix building with O=

[Qinxin Xia <xiaqinxin@huawei.com>]

On 2026/10/12 06:33:31, Sasha Levin <sashal@kernel.org> wrote:
> With O= set, "all" depends on $(OUTPUT)dma_map_benchmark, but the only
> rule builds dma_map_benchmark in the source directory, and built-in
> rules are disabled:
> 
>    make: *** No rule to make target '<O>/dma_map_benchmark', needed by 'all'.  Stop.
> 
> Build $(OUTPUT)dma_map_benchmark.
> 
> Fixes: f74ee32963f1b ("tools/dma: move dma_map_benchmark from selftests to tools/dma")
> Cc: stable@vger.kernel.org
> Assisted-by: LLM
> Signed-off-by: Sasha Levin <sashal@kernel.org>
> ---
>   tools/dma/Makefile | 4 ++--
>   1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/tools/dma/Makefile b/tools/dma/Makefile
> index e4abf37bf020c..0c239a6b9eae5 100644
> --- a/tools/dma/Makefile
> +++ b/tools/dma/Makefile
> @@ -38,8 +38,8 @@ prepare: $(OUTPUT)include/linux/map_benchmark.h
>   FORCE:
>   
>   DMA_MAP_BENCHMARK = dma_map_benchmark
> -$(DMA_MAP_BENCHMARK): prepare FORCE
> -	$(CC) $(CFLAGS) $(DMA_MAP_BENCHMARK).c -o $(DMA_MAP_BENCHMARK)
> +$(OUTPUT)$(DMA_MAP_BENCHMARK): prepare FORCE
> +	$(CC) $(CFLAGS) $(DMA_MAP_BENCHMARK).c -o $@
>   
>   clean:
>   	rm -f $(ALL_PROGRAMS)

Acked-by: Qinxin Xia <xiaqinxin@huawei.com>
-- 
Thanks,
Qinxin