linux-kernel - Re: hexagon: Use raw_copy_to

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Message-ID: <20170602224548.GA20386@roeck-us.net>
Date:   Fri, 2 Jun 2017 15:45:48 -0700
From:   Guenter Roeck <linux@...ck-us.net>
To:     Richard Kuo <rkuo@...eaurora.org>
Cc:     linux-hexagon@...r.kernel.org, linux-kernel@...r.kernel.org,
        Al Viro <viro@...iv.linux.org.uk>
Subject: Re: hexagon: Use raw_copy_to_user

Hi Richard,

On Fri, Jun 02, 2017 at 04:33:04PM -0500, Richard Kuo wrote:
> On Fri, Jun 02, 2017 at 06:03:53AM -0700, Guenter Roeck wrote:
> > ping ....
> > 
> > On Tue, May 02, 2017 at 08:52:48PM -0700, Guenter Roeck wrote:
> > > Commit ac4691fac8ad ("hexagon: switch to RAW_COPY_USER") replaced
> > > __copy_to_user_hexagon() with raw_copy_to_user(), but did not catch
> > > all callers, resulting in the following build error.
> > > 
> > > arch/hexagon/mm/uaccess.c: In function '__clear_user_hexagon':
> > > arch/hexagon/mm/uaccess.c:40:3: error:
> > > 	implicit declaration of function '__copy_to_user_hexagon'
> > > 
> > > Fixes: ac4691fac8ad ("hexagon: switch to RAW_COPY_USER")
> > > Cc: Al Viro <viro@...iv.linux.org.uk>
> > > Signed-off-by: Guenter Roeck <linux@...ck-us.net>
> > > Acked-by: Al Viro <viro@...iv.linux.org.uk>
> > > ---
> > >  arch/hexagon/mm/uaccess.c | 5 ++---
> > >  1 file changed, 2 insertions(+), 3 deletions(-)
> > > 
> > > diff --git a/arch/hexagon/mm/uaccess.c b/arch/hexagon/mm/uaccess.c
> > > index ec90afdb3ad0..c599eb126c9e 100644
> > > --- a/arch/hexagon/mm/uaccess.c
> > > +++ b/arch/hexagon/mm/uaccess.c
> > > @@ -37,15 +37,14 @@ __kernel_size_t __clear_user_hexagon(void __user *dest, unsigned long count)
> > >  	long uncleared;
> > >  
> > >  	while (count > PAGE_SIZE) {
> > > -		uncleared = __copy_to_user_hexagon(dest, &empty_zero_page,
> > > -						PAGE_SIZE);
> > > +		uncleared = raw_copy_to_user(dest, &empty_zero_page, PAGE_SIZE);
> > >  		if (uncleared)
> > >  			return count - (PAGE_SIZE - uncleared);
> > >  		count -= PAGE_SIZE;
> > >  		dest += PAGE_SIZE;
> > >  	}
> > >  	if (count)
> > > -		count = __copy_to_user_hexagon(dest, &empty_zero_page, count);
> > > +		count = raw_copy_to_user(dest, &empty_zero_page, count);
> > >  
> > >  	return count;
> > >  }
> > --
> > To unsubscribe from this list: send the line "unsubscribe linux-hexagon" in
> > the body of a message to majordomo@...r.kernel.org
> > More majordomo info at  http://vger.kernel.org/majordomo-info.html
> 
> Acked-by: Richard Kuo <rkuo@...eaurora.org>
> 
Do you want me to send it to Linus ?

Thanks,
Guenter