linux-kernel - Re: [PATCH v2 2/2] selftests/vm: use top_srcdir instead of recomputing relative paths

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Date:   Fri, 19 Aug 2022 17:14:07 -0700
From:   John Hubbard <jhubbard@...dia.com>
To:     Axel Rasmussen <axelrasmussen@...gle.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Guillaume Tucker <guillaume.tucker@...labora.com>,
        Jérôme Glisse <jglisse@...hat.com>,
        Shuah Khan <shuah@...nel.org>
Cc:     linux-kselftest@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-mm@...ck.org
Subject: Re: [PATCH v2 2/2] selftests/vm: use top_srcdir instead of
 recomputing relative paths

On 8/19/22 12:19, Axel Rasmussen wrote:
> In various places both in t/t/s/v/Makefile as well as some of the test
> sources, we were referring to headers or directories using some fairly
> long relative paths.
> 
> Since we have a working top_srcdir variable though, which refers to the
> root of the kernel tree, we can clean up all of these "up and over"
> relative paths, just relying on the single variable instead.
> 
> Signed-off-by: Axel Rasmussen <axelrasmussen@...gle.com>
> ---
>   tools/testing/selftests/vm/Makefile    | 2 +-
>   tools/testing/selftests/vm/gup_test.c  | 2 +-
>   tools/testing/selftests/vm/hmm-tests.c | 4 ++--
>   tools/testing/selftests/vm/ksm_tests.c | 2 +-
>   4 files changed, 5 insertions(+), 5 deletions(-)


Very nice, thank you for the extra cleanup here.

Reviewed-by: John Hubbard <jhubbard@...dia.com>

thanks,
-- 
John Hubbard
NVIDIA

> 
> diff --git a/tools/testing/selftests/vm/Makefile b/tools/testing/selftests/vm/Makefile
> index d9fa6a9ea584..d516b8c38eed 100644
> --- a/tools/testing/selftests/vm/Makefile
> +++ b/tools/testing/selftests/vm/Makefile
> @@ -25,7 +25,7 @@ MACHINE ?= $(shell echo $(uname_M) | sed -e 's/aarch64.*/arm64/' -e 's/ppc64.*/p
>   # LDLIBS.
>   MAKEFLAGS += --no-builtin-rules
>   
> -CFLAGS = -Wall -I ../../../../usr/include $(EXTRA_CFLAGS) $(KHDR_INCLUDES)
> +CFLAGS = -Wall -I $(top_srcdir) -I $(top_srcdir)/usr/include $(EXTRA_CFLAGS) $(KHDR_INCLUDES)
>   LDLIBS = -lrt -lpthread
>   TEST_GEN_FILES = compaction_test
>   TEST_GEN_FILES += gup_test
> diff --git a/tools/testing/selftests/vm/gup_test.c b/tools/testing/selftests/vm/gup_test.c
> index a309876d832f..e43879291dac 100644
> --- a/tools/testing/selftests/vm/gup_test.c
> +++ b/tools/testing/selftests/vm/gup_test.c
> @@ -10,7 +10,7 @@
>   #include <sys/types.h>
>   #include <pthread.h>
>   #include <assert.h>
> -#include "../../../../mm/gup_test.h"
> +#include <mm/gup_test.h>
>   #include "../kselftest.h"
>   
>   #include "util.h"
> diff --git a/tools/testing/selftests/vm/hmm-tests.c b/tools/testing/selftests/vm/hmm-tests.c
> index 529f53b40296..98b949c279be 100644
> --- a/tools/testing/selftests/vm/hmm-tests.c
> +++ b/tools/testing/selftests/vm/hmm-tests.c
> @@ -35,8 +35,8 @@
>    * This is a private UAPI to the kernel test module so it isn't exported
>    * in the usual include/uapi/... directory.
>    */
> -#include "../../../../lib/test_hmm_uapi.h"
> -#include "../../../../mm/gup_test.h"
> +#include <lib/test_hmm_uapi.h>
> +#include <mm/gup_test.h>
>   
>   struct hmm_buffer {
>   	void		*ptr;
> diff --git a/tools/testing/selftests/vm/ksm_tests.c b/tools/testing/selftests/vm/ksm_tests.c
> index f5e4e0bbd081..0d85be2350fa 100644
> --- a/tools/testing/selftests/vm/ksm_tests.c
> +++ b/tools/testing/selftests/vm/ksm_tests.c
> @@ -11,7 +11,7 @@
>   #include <err.h>
>   
>   #include "../kselftest.h"
> -#include "../../../../include/vdso/time64.h"
> +#include <include/vdso/time64.h>
>   #include "util.h"
>   
>   #define KSM_SYSFS_PATH "/sys/kernel/mm/ksm/"