On 12.10.21 05:01, davidcomponentone@gmail.com wrote:

From: David Yang davidcomponentone@gmail.com

The coccinelle check report: "./tools/testing/selftests/vm/split_huge_page_test.c:344:36-42: ERROR: application of sizeof to pointer" Using the "strlen" to fix it.

Reported-by: Zeal Robot zealci@zte.com.cn Signed-off-by: David Yang davidcomponentone@gmail.com

---

tools/testing/selftests/vm/split_huge_page_test.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/testing/selftests/vm/split_huge_page_test.c b/tools/testing/selftests/vm/split_huge_page_test.c index 1af16d2c2a0a..52497b7b9f1d 100644 --- a/tools/testing/selftests/vm/split_huge_page_test.c +++ b/tools/testing/selftests/vm/split_huge_page_test.c @@ -341,7 +341,7 @@ void split_file_backed_thp(void) } /* write something to the file, so a file-backed THP can be allocated */

• num_written = write(fd, tmpfs_loc, sizeof(tmpfs_loc));

• num_written = write(fd, tmpfs_loc, strlen(tmpfs_loc) + 1); close(fd);

if (num_written < 1) {

I think the code really just wants to write anything to the file that will be >= 1, which is also the case with this weird usage of sizeof.

As an alternative, I think we can just write anything else to the file

num_written = write(fd, (void *)&fd, sizeof(fd));

or

num_written = write(fd, "1", 1);

If I am not wrong/