selftests/mm: khugepaged: remove str_dup() usage

We don't check str_dup() return value and never free it.  While both
things are irrelevant in practice, let's just clean it up by working on
argv[0] directly and avoiding the str_dup().

Nobody after us needs these parts of the argv[0] string anyway.

This patch is inspired by previous work from Anshuman Tewari [1].

Link: https://lore.kernel.org/r/20260821114416.12255-1-anshumantewari123@gmail.com [1]
Link: https://lore.kernel.org/20260825-remove_str_dup-v1-1-0ba2121a820c@kernel.org
Signed-off-by: David Hildenbrand (Arm) <david@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: Lorenzo Stoakes (ARM) <ljs@kernel.org>
Reviewed-by: Anshuman Tewari <anshumantewari123@gmail.com>
Reviewed-by: Zi Yan <ziy@nvidia.com>
Reviewed-by: Lance Yang <lance.yang@linux.dev>
Reviewed-by: Dev Jain <dev.jain@arm.com>
Acked-by: Usama Arif <usama.arif@linux.dev>
Reviewed-by: Baolin Wang <baolin.wang@linux.alibaba.com>
Reviewed-by: Barry Song <baohua@kernel.org>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>

1 files changed, 1 insertions, 1 deletions

diff --git a/tools/testing/selftests/mm/khugepaged.c b/tools/testing/selftests/mm/khugepaged.c
index 1d2d6bd72fd2..83d27d069c41 100644
--- a/tools/testing/selftests/mm/khugepaged.c
+++ b/tools/testing/selftests/mm/khugepaged.c
@@ -1227,7 +1227,7 @@ static void parse_test_type(int argc, char **argv)
 		return;
 	}
 
-	buf = strdup(argv[0]);
+	buf = argv[0];
 	token = strsep(&buf, ":");
 
 	if (!strcmp(token, "all")) {