From: Yang Shi <yang.shi@linux.alibaba.com>
To: akpm@linux-foundation.org
Cc: yang.shi@linux.alibaba.com, linux-mm@kvack.org,
linux-kernel@vger.kernel.org
Subject: [PATCH 1/2] mm: vmpressure: don't need call kfree if kstrndup fails
Date: Tue, 11 Feb 2020 13:24:08 +0800 [thread overview]
Message-ID: <1581398649-125989-1-git-send-email-yang.shi@linux.alibaba.com> (raw)
When kstrndup fails (returns NULL) there is no memory is allocated by
kmalloc, so no need to call kfree().
Signed-off-by: Yang Shi <yang.shi@linux.alibaba.com>
---
mm/vmpressure.c | 6 ++----
1 file changed, 2 insertions(+), 4 deletions(-)
diff --git a/mm/vmpressure.c b/mm/vmpressure.c
index 4bac22f..0590f00 100644
--- a/mm/vmpressure.c
+++ b/mm/vmpressure.c
@@ -371,10 +371,8 @@ int vmpressure_register_event(struct mem_cgroup *memcg,
int ret = 0;
spec_orig = spec = kstrndup(args, MAX_VMPRESSURE_ARGS_LEN, GFP_KERNEL);
- if (!spec) {
- ret = -ENOMEM;
- goto out;
- }
+ if (!spec)
+ return -ENOMEM;
/* Find required level */
token = strsep(&spec, ",");
--
1.8.3.1
next reply other threads:[~2020-02-11 5:24 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-02-11 5:24 Yang Shi [this message]
2020-02-11 5:24 ` [PATCH 2/2] mm: vmpressure: use mem_cgroup_is_root API Yang Shi
2020-02-12 2:08 ` David Rientjes
2020-02-12 8:23 ` Michal Hocko
2020-02-13 3:18 ` Yang Shi
2020-02-12 11:19 ` David Hildenbrand
2020-02-12 2:07 ` [PATCH 1/2] mm: vmpressure: don't need call kfree if kstrndup fails David Rientjes
2020-02-12 11:21 ` David Hildenbrand
2020-02-13 3:14 ` Yang Shi
2020-02-13 4:48 ` Andrew Morton
2020-02-13 4:51 ` Yang Shi
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