linux-kernel - Re: [PATCH] Remove Hayes ESP ioctls

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Date:	Thu, 17 Jun 2010 13:14:17 -0700
From:	Greg KH <greg@...ah.com>
To:	Jeff Dike <jdike@...toit.com>
Cc:	Alan Cox <alan@...ux.intel.com>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] Remove Hayes ESP ioctls

On Thu, Jun 17, 2010 at 01:09:38PM -0700, Greg KH wrote:
> On Thu, Jun 17, 2010 at 03:15:16PM -0400, Jeff Dike wrote:
> > On Thu, Jun 17, 2010 at 10:28:28AM -0700, Greg KH wrote:
> > > You forgot to put a "Signed-off-by:" line in here.
> > > 
> > > Care to add it, and resend it to me?
> > 
> > Oops...
> > 
> > commit e6b14f5bc9803589241bc2aae1565fa0c5bd0ce1
> > Author: Jeff Dike <jdike@...ux.intel.com>
> > Date:   Thu Jun 17 11:54:24 2010 -0400
> > 
> >     Remove Hayes ESP ioctls
> >     
> >     The Hayes ESP driver has been removed from the tree:
> >         commit f53a2ade0bb9f2a81f473e6469155172a96b7c38
> >         ("tty: esp: remove broken driver")
> >     so its ioctls aren't needed any more.
> > 
> >     Signed-off-by: Jeff Dike <jdike@...ux.intel.com>
> > 
> > diff --git a/include/asm-generic/ioctls.h b/include/asm-generic/ioctls.h
> > index a799e20..16218ac 100644
> > --- a/include/asm-generic/ioctls.h
> > +++ b/include/asm-generic/ioctls.h
> > @@ -86,16 +86,6 @@
> >  #define TIOCMIWAIT	0x545C	/* wait for a change on serial input line(s) */
> >  #define TIOCGICOUNT	0x545D	/* read serial port inline interrupt counts */
> >  
> > -/*
> > - * some architectures define FIOQSIZE as 0x545E, which is used for
> > - * TIOCGHAYESESP on others
> > - */
> > -#ifndef FIOQSIZE
> > -# define TIOCGHAYESESP	0x545E  /* Get Hayes ESP configuration */
> > -# define TIOCSHAYESESP	0x545F  /* Set Hayes ESP configuration */
> > -# define FIOQSIZE	0x5460
> > -#endif
> 
> Wait, don't we still need to define FIOQSIZE here if no one else has
> done it yet?  With this patch I get a build error on fs/ioctl.c:
> 	fs/ioctl.c: In function ‘do_vfs_ioctl’:
> 	fs/ioctl.c:573:7: error: ‘FIOQSIZE’ undeclared (first use in this function)
> 
> So shouldn't we just remove the TIOCGHAYESESP and TIOCSHAYESESP values,
> and only set FIOQSIZE if it's not set yet?

How about something like the following:


 include/asm-generic/ioctls.h |    6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

--- a/include/asm-generic/ioctls.h
+++ b/include/asm-generic/ioctls.h
@@ -87,12 +87,10 @@
 #define TIOCGICOUNT	0x545D	/* read serial port inline interrupt counts */
 
 /*
- * some architectures define FIOQSIZE as 0x545E, which is used for
- * TIOCGHAYESESP on others
+ * Some arches already define FIOQSIZE due to a historical
+ * conflict with a Hayes modem-specific ioctl value.
  */
 #ifndef FIOQSIZE
-# define TIOCGHAYESESP	0x545E  /* Get Hayes ESP configuration */
-# define TIOCSHAYESESP	0x545F  /* Set Hayes ESP configuration */
 # define FIOQSIZE	0x5460
 #endif
 
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