[PATCH v1] mm, vmpressure: use kstrndup instead of kmalloc+strncpy

From: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
To: David Rientjes <rientjes@google.com>,
	linux-mm@kvack.org, Andrew Morton <akpm@linux-foundation.org>
Cc: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Subject: [PATCH v1] mm, vmpressure: use kstrndup instead of kmalloc+strncpy
Date: Thu,  3 May 2018 23:18:07 +0300	[thread overview]
Message-ID: <20180503201807.24941-1-andriy.shevchenko@linux.intel.com> (raw)

Using kstrndup() simplifies the code.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
---
 mm/vmpressure.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/mm/vmpressure.c b/mm/vmpressure.c
index 85350ce2d25d..7142207224d3 100644
--- a/mm/vmpressure.c
+++ b/mm/vmpressure.c
@@ -390,12 +390,11 @@ int vmpressure_register_event(struct mem_cgroup *memcg,
 	char *token;
 	int ret = 0;
 
-	spec_orig = spec = kzalloc(MAX_VMPRESSURE_ARGS_LEN + 1, GFP_KERNEL);
+	spec_orig = spec = kstrndup(args, MAX_VMPRESSURE_ARGS_LEN, GFP_KERNEL);
 	if (!spec) {
 		ret = -ENOMEM;
 		goto out;
 	}
-	strncpy(spec, args, MAX_VMPRESSURE_ARGS_LEN);
 
 	/* Find required level */
 	token = strsep(&spec, ",");
-- 
2.17.0
