I picked this up from Costa's slub memcg series. For fixing added warning
by patch 4.
==
From: Glauber Costa <redacted>
Subject: [PATCH 6/6] remove __must_check for res_counter_charge_nofail()

Since we will succeed with the allocation no matter what, there
isn't the need to use __must_check with it. It can very well
be optional.

Signed-off-by: Glauber Costa <redacted>
Signed-off-by: KAMEZAWA Hiroyuki <redacted>
---
 include/linux/res_counter.h |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/include/linux/res_counter.h b/include/linux/res_counter.h
index d11c1cd..c6b0368 100644
--- a/include/linux/res_counter.h
+++ b/include/linux/res_counter.h

@@ -119,7 +119,7 @@ int __must_check res_counter_charge_locked(struct res_counter *counter,
 		unsigned long val);
 int __must_check res_counter_charge(struct res_counter *counter,
 		unsigned long val, struct res_counter **limit_fail_at);
-int __must_check res_counter_charge_nofail(struct res_counter *counter,
+int res_counter_charge_nofail(struct res_counter *counter,
 		unsigned long val, struct res_counter **limit_fail_at);
 
 /*

-- 
1.7.4.1


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