linux-kernel - Re: stable-3.0: s390 build breakage [was: Linux 3.0.24]

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Date:	Thu, 15 Mar 2012 17:49:54 +0100
From:	Willy Tarreau <w@....eu>
To:	Greg KH <gregkh@...uxfoundation.org>
Cc:	Jiri Slaby <jslaby@...e.cz>, linux-kernel@...r.kernel.org,
	Andrew Morton <akpm@...ux-foundation.org>,
	torvalds@...ux-foundation.org, stable@...r.kernel.org, lwn@....net,
	Heiko Carstens <heiko.carstens@...ibm.com>,
	Jiri Slaby <jirislaby@...il.com>
Subject: Re: stable-3.0: s390 build breakage [was: Linux 3.0.24]

On Thu, Mar 15, 2012 at 09:46:24AM -0700, Greg KH wrote:
> On Thu, Mar 15, 2012 at 05:27:26PM +0100, Jiri Slaby wrote:
> > On 03/15/2012 11:48 AM, Jiri Slaby wrote:
> > > On 03/12/2012 09:34 PM, Greg KH wrote:
> > >> I'm announcing the release of the 3.0.24 kernel.
> > > ...
> > >> Heiko Carstens (1): compat: fix compile breakage on s390
> > > 
> > > It looks like we need the same fix as for 2.6.32.59:
> > > arch/s390/kernel/setup.c: In function 'setup_addressing_mode':
> > > arch/s390/kernel/setup.c:328: error: 'PSW32_ASC_PRIMARY' undeclared
> > > (first use in this function)
> > > arch/s390/kernel/setup.c:328: error: (Each undeclared identifier is
> > > reported only once
> > > arch/s390/kernel/setup.c:328: error: for each function it appears in.)
> > 
> > And when that one is fixed, there is another error:
> > drivers/s390/char/fs3270.c: In function 'fs3270_ioctl':
> > drivers/s390/char/fs3270.c:335: error: implicit declaration of function
> > 'compat_ptr'
> > drivers/s390/char/fs3270.c:335: warning: assignment makes pointer from
> > integer without a cast
> 
> Ick, have a patch for this?

This one is declared in arch/s390/include/asm/compat.h:

static inline void __user *compat_ptr(compat_uptr_t uptr)
{
        return (void __user *)(unsigned long)(uptr & 0x7fffffffUL);
}

In 2.6.32, fs3270.c include linux/compat.h. In 3.0 it includes asm/compat.h
instead. I would have thought the later would have been enough.

Hoping this helps,
Willy

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