* [PATCH] mm: huge_memory: Replace obsolete memalign() with posix_memalign()
@ 2023-04-12 10:45 Deming Wang
2023-04-12 12:30 ` David Hildenbrand
0 siblings, 1 reply; 6+ messages in thread
From: Deming Wang @ 2023-04-12 10:45 UTC (permalink / raw)
To: akpm, shuah; +Cc: linux-mm, linux-kselftest, linux-kernel, Deming Wang
memalign() is obsolete according to its manpage.
Replace memalign() with posix_memalign()
As a pointer is passed into posix_memalign(), initialize *one_page
to NULL to silence a warning about the function's return value being
used as uninitialized (which is not valid anyway because the error
is properly checked before p is returned).
Signed-off-by: Deming Wang <wangdeming@inspur.com>
---
tools/testing/selftests/mm/split_huge_page_test.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/tools/testing/selftests/mm/split_huge_page_test.c b/tools/testing/selftests/mm/split_huge_page_test.c
index cbb5e6893cbf..94c7dffc4d7d 100644
--- a/tools/testing/selftests/mm/split_huge_page_test.c
+++ b/tools/testing/selftests/mm/split_huge_page_test.c
@@ -96,10 +96,10 @@ void split_pmd_thp(void)
char *one_page;
size_t len = 4 * pmd_pagesize;
size_t i;
+ int ret;
- one_page = memalign(pmd_pagesize, len);
-
- if (!one_page) {
+ ret = posix_memalign((void **)&one_page, pmd_pagesize, len);
+ if (ret < 0) {
printf("Fail to allocate memory\n");
exit(EXIT_FAILURE);
}
--
2.27.0
^ permalink raw reply related [flat|nested] 6+ messages in thread* Re: [PATCH] mm: huge_memory: Replace obsolete memalign() with posix_memalign()
2023-04-12 10:45 [PATCH] mm: huge_memory: Replace obsolete memalign() with posix_memalign() Deming Wang
@ 2023-04-12 12:30 ` David Hildenbrand
0 siblings, 0 replies; 6+ messages in thread
From: David Hildenbrand @ 2023-04-12 12:30 UTC (permalink / raw)
To: Deming Wang, akpm, shuah; +Cc: linux-mm, linux-kselftest, linux-kernel
On 12.04.23 12:45, Deming Wang wrote:
> memalign() is obsolete according to its manpage.
>
> Replace memalign() with posix_memalign()
>
> As a pointer is passed into posix_memalign(), initialize *one_page
> to NULL to silence a warning about the function's return value being
Where is the initialization to NULL done below?
> used as uninitialized (which is not valid anyway because the error
> is properly checked before p is returned).
"p" ?
>
> Signed-off-by: Deming Wang <wangdeming@inspur.com>
> ---
> tools/testing/selftests/mm/split_huge_page_test.c | 6 +++---
> 1 file changed, 3 insertions(+), 3 deletions(-)
>
> diff --git a/tools/testing/selftests/mm/split_huge_page_test.c b/tools/testing/selftests/mm/split_huge_page_test.c
> index cbb5e6893cbf..94c7dffc4d7d 100644
> --- a/tools/testing/selftests/mm/split_huge_page_test.c
> +++ b/tools/testing/selftests/mm/split_huge_page_test.c
> @@ -96,10 +96,10 @@ void split_pmd_thp(void)
> char *one_page;
> size_t len = 4 * pmd_pagesize;
> size_t i;
> + int ret;
>
> - one_page = memalign(pmd_pagesize, len);
> -
> - if (!one_page) {
> + ret = posix_memalign((void **)&one_page, pmd_pagesize, len);
> + if (ret < 0) {
> printf("Fail to allocate memory\n");
> exit(EXIT_FAILURE);
> }
--
Thanks,
David / dhildenb
^ permalink raw reply [flat|nested] 6+ messages in thread
* [PATCH] mm: huge_memory: Replace obsolete memalign() with posix_memalign()
@ 2023-04-13 1:17 Deming Wang
2023-04-13 11:57 ` David Hildenbrand
0 siblings, 1 reply; 6+ messages in thread
From: Deming Wang @ 2023-04-13 1:17 UTC (permalink / raw)
To: akpm, shuah; +Cc: linux-mm, linux-kselftest, linux-kernel, Deming Wang
memalign() is obsolete according to its manpage.
Replace memalign() with posix_memalign()
As a pointer is passed into posix_memalign(), initialize *one_page
to NULL to silence a warning about the function's return value being
used as uninitialized (which is not valid anyway because the error
is properly checked before one_page is returned).
Signed-off-by: Deming Wang <wangdeming@inspur.com>
---
tools/testing/selftests/mm/split_huge_page_test.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/tools/testing/selftests/mm/split_huge_page_test.c b/tools/testing/selftests/mm/split_huge_page_test.c
index cbb5e6893cbf..94c7dffc4d7d 100644
--- a/tools/testing/selftests/mm/split_huge_page_test.c
+++ b/tools/testing/selftests/mm/split_huge_page_test.c
@@ -96,10 +96,10 @@ void split_pmd_thp(void)
char *one_page;
size_t len = 4 * pmd_pagesize;
size_t i;
+ int ret;
- one_page = memalign(pmd_pagesize, len);
-
- if (!one_page) {
+ ret = posix_memalign((void **)&one_page, pmd_pagesize, len);
+ if (ret < 0) {
printf("Fail to allocate memory\n");
exit(EXIT_FAILURE);
}
--
2.27.0
^ permalink raw reply related [flat|nested] 6+ messages in thread* Re: [PATCH] mm: huge_memory: Replace obsolete memalign() with posix_memalign()
2023-04-13 1:17 Deming Wang
@ 2023-04-13 11:57 ` David Hildenbrand
0 siblings, 0 replies; 6+ messages in thread
From: David Hildenbrand @ 2023-04-13 11:57 UTC (permalink / raw)
To: Deming Wang, akpm, shuah; +Cc: linux-mm, linux-kselftest, linux-kernel
On 13.04.23 03:17, Deming Wang wrote:
> memalign() is obsolete according to its manpage.
>
> Replace memalign() with posix_memalign()
>
> As a pointer is passed into posix_memalign(), initialize *one_page
> to NULL to silence a warning about the function's return value being
> used as uninitialized (which is not valid anyway because the error
> is properly checked before one_page is returned).
^ I'm getting tired of pointing out the same thing.
Please collect similar patches and send them as a series; and stop
copy-pasting the same thing into all of the similar patches you send.
Last but not least, tag you patches accordingly: "selftests/mm:
split_huge_page_test: ..."
>
> Signed-off-by: Deming Wang <wangdeming@inspur.com>
> ---
> tools/testing/selftests/mm/split_huge_page_test.c | 6 +++---
> 1 file changed, 3 insertions(+), 3 deletions(-)
>
> diff --git a/tools/testing/selftests/mm/split_huge_page_test.c b/tools/testing/selftests/mm/split_huge_page_test.c
> index cbb5e6893cbf..94c7dffc4d7d 100644
> --- a/tools/testing/selftests/mm/split_huge_page_test.c
> +++ b/tools/testing/selftests/mm/split_huge_page_test.c
> @@ -96,10 +96,10 @@ void split_pmd_thp(void)
> char *one_page;
> size_t len = 4 * pmd_pagesize;
> size_t i;
> + int ret;
>
> - one_page = memalign(pmd_pagesize, len);
> -
> - if (!one_page) {
> + ret = posix_memalign((void **)&one_page, pmd_pagesize, len);
> + if (ret < 0) {
> printf("Fail to allocate memory\n");
> exit(EXIT_FAILURE);
> }
--
Thanks,
David / dhildenb
^ permalink raw reply [flat|nested] 6+ messages in thread
* [PATCH] mm: huge_memory: Replace obsolete memalign() with posix_memalign()
@ 2023-04-12 7:49 Deming Wang
2023-04-12 8:27 ` David Hildenbrand
0 siblings, 1 reply; 6+ messages in thread
From: Deming Wang @ 2023-04-12 7:49 UTC (permalink / raw)
To: akpm, shuah; +Cc: linux-mm, linux-kselftest, linux-kernel, Deming Wang
memalign() is obsolete according to its manpage.
Replace memalign() with posix_memalign() and remove malloc.h include
that was there for memalign().
As a pointer is passed into posix_memalign(), initialize *p to NULL
to silence a warning about the function's return value being used as
uninitialized (which is not valid anyway because the error is properly
checked before p is returned).
Signed-off-by: Deming Wang <wangdeming@inspur.com>
---
tools/testing/selftests/mm/split_huge_page_test.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/tools/testing/selftests/mm/split_huge_page_test.c b/tools/testing/selftests/mm/split_huge_page_test.c
index cbb5e6893cbf..8f48f07bc821 100644
--- a/tools/testing/selftests/mm/split_huge_page_test.c
+++ b/tools/testing/selftests/mm/split_huge_page_test.c
@@ -96,10 +96,10 @@ void split_pmd_thp(void)
char *one_page;
size_t len = 4 * pmd_pagesize;
size_t i;
+ int ret;
- one_page = memalign(pmd_pagesize, len);
-
- if (!one_page) {
+ ret = posix_memalign((void **)(&one_page), pmd_pagesize, len);
+ if (ret < 0) {
printf("Fail to allocate memory\n");
exit(EXIT_FAILURE);
}
--
2.27.0
^ permalink raw reply related [flat|nested] 6+ messages in thread* Re: [PATCH] mm: huge_memory: Replace obsolete memalign() with posix_memalign()
2023-04-12 7:49 Deming Wang
@ 2023-04-12 8:27 ` David Hildenbrand
0 siblings, 0 replies; 6+ messages in thread
From: David Hildenbrand @ 2023-04-12 8:27 UTC (permalink / raw)
To: Deming Wang, akpm, shuah; +Cc: linux-mm, linux-kselftest, linux-kernel
On 12.04.23 09:49, Deming Wang wrote:
> memalign() is obsolete according to its manpage.
>
> Replace memalign() with posix_memalign() and remove malloc.h include
> that was there for memalign().
Comment does not apply.
>
> As a pointer is passed into posix_memalign(), initialize *p to NULL
> to silence a warning about the function's return value being used as
> uninitialized (which is not valid anyway because the error is properly
> checked before p is returned).
Comment does not apply.
>
> Signed-off-by: Deming Wang <wangdeming@inspur.com>
> ---
> tools/testing/selftests/mm/split_huge_page_test.c | 6 +++---
> 1 file changed, 3 insertions(+), 3 deletions(-)
>
> diff --git a/tools/testing/selftests/mm/split_huge_page_test.c b/tools/testing/selftests/mm/split_huge_page_test.c
> index cbb5e6893cbf..8f48f07bc821 100644
> --- a/tools/testing/selftests/mm/split_huge_page_test.c
> +++ b/tools/testing/selftests/mm/split_huge_page_test.c
> @@ -96,10 +96,10 @@ void split_pmd_thp(void)
> char *one_page;
> size_t len = 4 * pmd_pagesize;
> size_t i;
> + int ret;
>
> - one_page = memalign(pmd_pagesize, len);
> -
> - if (!one_page) {
> + ret = posix_memalign((void **)(&one_page), pmd_pagesize, len);
ret = posix_memalign((void **)&one_page, pmd_pagesize, len);
Should do.
> + if (ret < 0) {
> printf("Fail to allocate memory\n");
> exit(EXIT_FAILURE);
> }
--
Thanks,
David / dhildenb
^ permalink raw reply [flat|nested] 6+ messages in thread
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2023-04-12 10:45 [PATCH] mm: huge_memory: Replace obsolete memalign() with posix_memalign() Deming Wang
2023-04-12 12:30 ` David Hildenbrand
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2023-04-13 1:17 Deming Wang
2023-04-13 11:57 ` David Hildenbrand
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