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Message-ID: <6934efce0808210806r701f2e3bo677d2bd2da78faec@mail.gmail.com>
Date: Thu, 21 Aug 2008 08:06:50 -0700
From: "Jared Hulbert" <jaredeh@gmail.com>
To: "Arnd Bergmann" <arnd@arndb.de>
Subject: Re: [PATCH 04/10] AXFS: axfs_inode.c
Cc: Linux-kernel@vger.kernel.org, linux-embedded@vger.kernel.org,
       linux-mtd <linux-mtd@lists.infradead.org>,
       "=?UTF-8?Q?J=C3=B6rn_Engel?=" <joern@logfs.org>, tim.bird@am.sony.com,
       cotte@de.ibm.com, nickpiggin@yahoo.com.au
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> Have you seen any benefit of the rwsem over a simple mutex? I would guess
> that you can never even get into the situation where you get concurrent
> readers since I haven't found a single down_read() in your code, only
> downgrade_write()

We implemented a rwsem here because you can get concurrent readers.
My understanding is that downgrade_write() puts the rewem into the
same state as down_read().  Am I mistaken?
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