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Date: Mon, 2 Mar 2015 20:15:47 -0800 (PST)
From: David Rientjes <rientjes@google.com>
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To: Tapasweni Pathak <tapaswenipathak@gmail.com>
cc: viro@zeniv.linux.org.uk, akpm@linux-foundation.org, tglx@linutronix.de,
        ionut.m.alexa@gmail.com, paulmcquad@gmail.com,
        linux-kernel@vger.kernel.org
Subject: Re: [PATCH] kernel: Unlock after locking
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On Tue, 3 Mar 2015, Tapasweni Pathak wrote:

> diff --git a/kernel/acct.c b/kernel/acct.c
> index e6c10d1a..f592218 100644
> --- a/kernel/acct.c
> +++ b/kernel/acct.c
> @@ -161,6 +161,7 @@ again:
>  		acct_put(res);
>  		goto again;
>  	}
> +	mutex_unlock(&res->lock);
>  	return res;
>  }
> 

This function returns with the mutex held, the caller releases it.