linux-kernel - Re: [PATCH] drivers/vmw_vmci: Show correct get_user_pages

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Message-ID: <20150217222045.GB27762@kroah.com>
Date:	Tue, 17 Feb 2015 14:20:45 -0800
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	Davidlohr Bueso <dave@...olabs.net>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] drivers/vmw_vmci: Show correct get_user_pages_fast upon
 err

On Tue, Feb 17, 2015 at 02:09:19PM -0800, Davidlohr Bueso wrote:
> On Tue, 2015-02-17 at 14:02 -0800, Greg Kroah-Hartman wrote:
> > On Tue, Feb 17, 2015 at 01:57:34PM -0800, Davidlohr Bueso wrote:
> > > As of 240ddd495a9 (vmw_vmci: Convert driver to use get_user_pages_fast())
> > > we no longer call get_user_pages(), thus update the warning.
> > > 
> > > Signed-off-by: Davidlohr Bueso <dbueso@...e.de>
> > > ---
> > >  drivers/misc/vmw_vmci/vmci_queue_pair.c | 6 ++++--
> > >  1 file changed, 4 insertions(+), 2 deletions(-)
> > > 
> > > diff --git a/drivers/misc/vmw_vmci/vmci_queue_pair.c b/drivers/misc/vmw_vmci/vmci_queue_pair.c
> > > index 35f19a6..1d80c56 100644
> > > --- a/drivers/misc/vmw_vmci/vmci_queue_pair.c
> > > +++ b/drivers/misc/vmw_vmci/vmci_queue_pair.c
> > > @@ -737,7 +737,8 @@ static int qp_host_get_user_memory(u64 produce_uva,
> > >  				     produce_q->kernel_if->num_pages, 1,
> > >  				     produce_q->kernel_if->u.h.header_page);
> > >  	if (retval < produce_q->kernel_if->num_pages) {
> > > -		pr_warn("get_user_pages(produce) failed (retval=%d)", retval);
> > > +		pr_warn("get_user_pages_fast(produce) failed (retval=%d)",
> > > +			retval);
> > 
> > What can a user do with this message?  Shouldn't it be a debug message?
> 
> I was trying to be as least invasive as possible, as I zero knowledge of
> this thingie. But yes, such a message does seem more appropriate as
> pr_debug(). Do you want me to respin?

Please do.

thanks,

greg k-h
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