From: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
To: Mark Brown <broonie@opensource.wolfsonmicro.com>
Cc: x86@kernel.org,
Jerome Oufella <jerome.oufella@savoirfairelinux.com>,
Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>, "H. Peter Anvin" <hpa@zytor.com>,
linux-kernel@vger.kernel.org
Subject: Re: [v2 2/4] platform: (TS-5500) add GPIO support
Date: Tue, 30 Aug 2011 17:12:03 -0400 [thread overview]
Message-ID: <20110830171203.3fc81588@v0nbox> (raw)
In-Reply-To: <20110829221132.GB26846@sirena.org.uk>
On Mon, 29 Aug 2011 23:11:33 +0100,
Mark Brown <broonie@opensource.wolfsonmicro.com> wrote:
> On Fri, Aug 26, 2011 at 07:40:25PM -0400, Vivien Didelot wrote:
> > + bitno = line_to_bit_map[offset];
> > +
> > + mutex_lock(&drvdata->gpio_lock);
> > + byte = inb(ioaddr);
> > + mutex_unlock(&drvdata->gpio_lock);
>
> Do you really need the lock to do a read?
Thanks for the explanation. I removed the mutex lock here as there's no
critical section except for the inb() call in this function.
Vivien.
next prev parent reply other threads:[~2011-08-30 21:12 UTC|newest]
Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-08-26 23:40 [v2 0/4] Support for the TS-5500 platform Vivien Didelot
2011-08-26 23:40 ` [v2 1/4] platform: (TS-5500) add base support Vivien Didelot
2011-08-26 23:40 ` [v2 2/4] platform: (TS-5500) add GPIO support Vivien Didelot
2011-08-29 22:11 ` Mark Brown
2011-08-30 5:36 ` H. Peter Anvin
2011-08-30 11:00 ` Mark Brown
2011-08-30 14:49 ` Vivien Didelot
2011-08-30 15:12 ` Mark Brown
2011-10-12 16:41 ` Linus Walleij
2011-10-13 3:31 ` Grant Likely
2011-08-30 18:39 ` Vivien Didelot
2011-08-30 18:41 ` Mark Brown
2011-08-30 18:43 ` H. Peter Anvin
2011-08-30 21:12 ` Vivien Didelot [this message]
2011-10-12 15:35 ` Ingo Molnar
2011-10-14 6:14 ` Ingo Molnar
2011-10-15 14:29 ` Vivien Didelot
2011-08-26 23:40 ` [v2 3/4] platform: (TS-5500) add LED support Vivien Didelot
2011-08-29 22:16 ` Mark Brown
2011-08-30 5:37 ` H. Peter Anvin
2011-08-30 21:14 ` Vivien Didelot
2011-08-30 21:15 ` Mark Brown
2011-08-30 21:17 ` H. Peter Anvin
2011-08-30 21:56 ` Vivien Didelot
2011-08-30 22:04 ` H. Peter Anvin
2011-08-31 20:01 ` Vivien Didelot
2011-10-12 15:34 ` Ingo Molnar
2011-10-15 14:42 ` Vivien Didelot
2011-10-15 14:56 ` Ingo Molnar
2011-11-16 5:41 ` Ingo Molnar
2011-11-16 12:50 ` Mark Brown
2011-10-26 15:41 ` Ingo Molnar
2011-11-17 15:27 ` Vivien Didelot
2011-08-26 23:40 ` [v2 4/4] platform: (TS-5500) add ADC support Vivien Didelot
2011-08-29 22:13 ` Mark Brown
2011-09-12 7:28 ` [v2 0/4] Support for the TS-5500 platform Pavel Machek
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20110830171203.3fc81588@v0nbox \
--to=vivien.didelot@savoirfairelinux.com \
--cc=broonie@opensource.wolfsonmicro.com \
--cc=hpa@zytor.com \
--cc=jerome.oufella@savoirfairelinux.com \
--cc=linux-kernel@vger.kernel.org \
--cc=mingo@redhat.com \
--cc=tglx@linutronix.de \
--cc=x86@kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox