linux-kernel - Re: [PATCH] uml: Convert to unlocked

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Date:	Mon, 17 May 2010 07:31:42 -0400 (EDT)
From:	John Kacur <jkacur@...hat.com>
To:	Frederic Weisbecker <fweisbec@...il.com>
Cc:	lkml <linux-kernel@...r.kernel.org>, Arnd Bergmann <arnd@...db.de>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...e.hu>, Jeff Dike <jdike@...toit.com>
Subject: Re: [PATCH] uml: Convert to unlocked_ioctls to remove implicit BKL


----- "Frederic Weisbecker" <fweisbec@...il.com> wrote:

> On Fri, May 07, 2010 at 05:34:28PM +0200, John Kacur wrote:
> > Convert to hostaudio_ioctl and hostmixer_ioctl_mixdev to
> unlocked_ioctl
> > 
> > Signed-off-by: John Kacur <jkacur@...hat.com>
> > ---
> 
> 
> 
> Hi John,
> 
> The patch looks good and I'm about to queue it, however it lacks
> a changelog that properly explains the safety of the conversion.
> 
> Are you fine with this?
> 
> "We don't do anything except relying the ioctl to the host which

s/relying/relaying

Other than that, fine with me, thanks!
John

> should then take care of the synchronization."
> 
> Thanks.
> 
> 
> 
> 
> >  arch/um/drivers/hostaudio_kern.c |    8 ++++----
> >  1 files changed, 4 insertions(+), 4 deletions(-)
> > 
> > diff --git a/arch/um/drivers/hostaudio_kern.c
> b/arch/um/drivers/hostaudio_kern.c
> > index 368219c..ae42695 100644
> > --- a/arch/um/drivers/hostaudio_kern.c
> > +++ b/arch/um/drivers/hostaudio_kern.c
> > @@ -136,7 +136,7 @@ static unsigned int hostaudio_poll(struct file
> *file,
> >  	return mask;
> >  }
> >  
> > -static int hostaudio_ioctl(struct inode *inode, struct file *file,
> > +static long hostaudio_ioctl(struct file *file,
> >  			   unsigned int cmd, unsigned long arg)
> >  {
> >  	struct hostaudio_state *state = file->private_data;
> > @@ -223,7 +223,7 @@ static int hostaudio_release(struct inode
> *inode, struct file *file)
> >  
> >  /* /dev/mixer file operations */
> >  
> > -static int hostmixer_ioctl_mixdev(struct inode *inode, struct file
> *file,
> > +static long hostmixer_ioctl_mixdev(struct file *file,
> >  				  unsigned int cmd, unsigned long arg)
> >  {
> >  	struct hostmixer_state *state = file->private_data;
> > @@ -289,7 +289,7 @@ static const struct file_operations
> hostaudio_fops = {
> >  	.read           = hostaudio_read,
> >  	.write          = hostaudio_write,
> >  	.poll           = hostaudio_poll,
> > -	.ioctl          = hostaudio_ioctl,
> > +	.unlocked_ioctl	= hostaudio_ioctl,
> >  	.mmap           = NULL,
> >  	.open           = hostaudio_open,
> >  	.release        = hostaudio_release,
> > @@ -298,7 +298,7 @@ static const struct file_operations
> hostaudio_fops = {
> >  static const struct file_operations hostmixer_fops = {
> >  	.owner          = THIS_MODULE,
> >  	.llseek         = no_llseek,
> > -	.ioctl          = hostmixer_ioctl_mixdev,
> > +	.unlocked_ioctl	= hostmixer_ioctl_mixdev,
> >  	.open           = hostmixer_open_mixdev,
> >  	.release        = hostmixer_release,
> >  };
> > -- 
> > 1.6.6.1
> >
--
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