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Date: Mon, 27 Feb 2012 10:09:51 +0100
From: Heiko Carstens <heiko.carstens@...ibm.com>
To: Christian Borntraeger <borntraeger@...ibm.com>
Cc: Linus Torvalds <torvalds@...ux-foundation.org>,
Andreas Schwab <schwab@...ux-m68k.org>,
Ian Kent <raven@...maw.net>,
David Miller <davem@...emloft.net>,
linux-kernel@...r.kernel.org, "H. Peter Anvin" <hpa@...or.com>,
autofs@...r.kernel.org, Thomas Meyer <thomas@...3r.de>,
Al Viro <viro@...iv.linux.org.uk>,
Martin Schwidefsky <schwidefsky@...ibm.com>
Subject: Re: [PATCH] autofs4: fix compilation without CONFIG_COMPAT
On Mon, Feb 27, 2012 at 08:29:25AM +0100, Christian Borntraeger wrote:
> On 26/02/12 02:31, Linus Torvalds wrote:
> >
> > +#else
> > +
> > +#define is_compat_task() (0)
> > +
>
> Linus,
>
> this breaks 32bit builds of s390 (and maybe others), since several platforms already
> define a is_compat_task.
It breaks only !COMPAT builds on s390, since only we have the is_compat_task()
function defined for !COMPAT. The reason for that was simply to get rid of a
couple of ugly #ifdefs.
Note, that we still need to include asm/compat.h in some file since we need the
compat_ptr typedef.
That might be ugly, but I preferred including that header file so we could get
rid of the #ifdefs.
Anyway... the patch below fixes the build issues:
>From 5f96c00c9ace3935eb52ce6bdf25a4171f867f4a Mon Sep 17 00:00:00 2001
From: Heiko Carstens <heiko.carstens@...ibm.com>
Date: Mon, 27 Feb 2012 10:01:52 +0100
Subject: [PATCH] compat: fix compile breakage on s390
The new is_compat_task() define for the !COMPAT case in include/linux/compat.h
conflicts with a similar define in arch/s390/include/asm/compat.h.
This is the minimal patch which fixes the build issues.
Signed-off-by: Heiko Carstens <heiko.carstens@...ibm.com>
---
arch/s390/include/asm/compat.h | 7 -------
arch/s390/kernel/process.c | 1 -
arch/s390/kernel/ptrace.c | 2 +-
arch/s390/kernel/setup.c | 2 +-
arch/s390/kernel/signal.c | 1 -
arch/s390/mm/fault.c | 1 -
arch/s390/mm/mmap.c | 2 +-
drivers/s390/block/dasd_eckd.c | 2 +-
drivers/s390/block/dasd_ioctl.c | 1 +
drivers/s390/char/fs3270.c | 1 +
drivers/s390/char/vmcp.c | 1 +
drivers/s390/cio/chsc_sch.c | 1 +
drivers/s390/scsi/zfcp_cfdc.c | 1 +
13 files changed, 9 insertions(+), 14 deletions(-)
diff --git a/arch/s390/include/asm/compat.h b/arch/s390/include/asm/compat.h
index 2e49748..234f1d8 100644
--- a/arch/s390/include/asm/compat.h
+++ b/arch/s390/include/asm/compat.h
@@ -172,13 +172,6 @@ static inline int is_compat_task(void)
return is_32bit_task();
}
-#else
-
-static inline int is_compat_task(void)
-{
- return 0;
-}
-
#endif
static inline void __user *arch_compat_alloc_user_space(long len)
diff --git a/arch/s390/kernel/process.c b/arch/s390/kernel/process.c
index 4261aa7..e795933 100644
--- a/arch/s390/kernel/process.c
+++ b/arch/s390/kernel/process.c
@@ -29,7 +29,6 @@
#include <asm/irq.h>
#include <asm/timer.h>
#include <asm/nmi.h>
-#include <asm/compat.h>
#include <asm/smp.h>
#include "entry.h"
diff --git a/arch/s390/kernel/ptrace.c b/arch/s390/kernel/ptrace.c
index 9d82ed4..61f9548 100644
--- a/arch/s390/kernel/ptrace.c
+++ b/arch/s390/kernel/ptrace.c
@@ -20,8 +20,8 @@
#include <linux/regset.h>
#include <linux/tracehook.h>
#include <linux/seccomp.h>
+#include <linux/compat.h>
#include <trace/syscall.h>
-#include <asm/compat.h>
#include <asm/segment.h>
#include <asm/page.h>
#include <asm/pgtable.h>
diff --git a/arch/s390/kernel/setup.c b/arch/s390/kernel/setup.c
index 354de07..3b2efc8 100644
--- a/arch/s390/kernel/setup.c
+++ b/arch/s390/kernel/setup.c
@@ -46,6 +46,7 @@
#include <linux/kexec.h>
#include <linux/crash_dump.h>
#include <linux/memory.h>
+#include <linux/compat.h>
#include <asm/ipl.h>
#include <asm/uaccess.h>
@@ -59,7 +60,6 @@
#include <asm/ptrace.h>
#include <asm/sections.h>
#include <asm/ebcdic.h>
-#include <asm/compat.h>
#include <asm/kvm_virtio.h>
#include <asm/diag.h>
diff --git a/arch/s390/kernel/signal.c b/arch/s390/kernel/signal.c
index a8ba840..2d421d9 100644
--- a/arch/s390/kernel/signal.c
+++ b/arch/s390/kernel/signal.c
@@ -30,7 +30,6 @@
#include <asm/ucontext.h>
#include <asm/uaccess.h>
#include <asm/lowcore.h>
-#include <asm/compat.h>
#include "entry.h"
#define _BLOCKABLE (~(sigmask(SIGKILL) | sigmask(SIGSTOP)))
diff --git a/arch/s390/mm/fault.c b/arch/s390/mm/fault.c
index 354dd39..e8fcd92 100644
--- a/arch/s390/mm/fault.c
+++ b/arch/s390/mm/fault.c
@@ -36,7 +36,6 @@
#include <asm/pgtable.h>
#include <asm/irq.h>
#include <asm/mmu_context.h>
-#include <asm/compat.h>
#include "../kernel/entry.h"
#ifndef CONFIG_64BIT
diff --git a/arch/s390/mm/mmap.c b/arch/s390/mm/mmap.c
index f09c748..a0155c0 100644
--- a/arch/s390/mm/mmap.c
+++ b/arch/s390/mm/mmap.c
@@ -29,8 +29,8 @@
#include <linux/mman.h>
#include <linux/module.h>
#include <linux/random.h>
+#include <linux/compat.h>
#include <asm/pgalloc.h>
-#include <asm/compat.h>
static unsigned long stack_maxrandom_size(void)
{
diff --git a/drivers/s390/block/dasd_eckd.c b/drivers/s390/block/dasd_eckd.c
index 70880be..2617b1e 100644
--- a/drivers/s390/block/dasd_eckd.c
+++ b/drivers/s390/block/dasd_eckd.c
@@ -18,12 +18,12 @@
#include <linux/hdreg.h> /* HDIO_GETGEO */
#include <linux/bio.h>
#include <linux/module.h>
+#include <linux/compat.h>
#include <linux/init.h>
#include <asm/debug.h>
#include <asm/idals.h>
#include <asm/ebcdic.h>
-#include <asm/compat.h>
#include <asm/io.h>
#include <asm/uaccess.h>
#include <asm/cio.h>
diff --git a/drivers/s390/block/dasd_ioctl.c b/drivers/s390/block/dasd_ioctl.c
index f1a2016..792c69e 100644
--- a/drivers/s390/block/dasd_ioctl.c
+++ b/drivers/s390/block/dasd_ioctl.c
@@ -13,6 +13,7 @@
#define KMSG_COMPONENT "dasd"
#include <linux/interrupt.h>
+#include <linux/compat.h>
#include <linux/major.h>
#include <linux/fs.h>
#include <linux/blkpg.h>
diff --git a/drivers/s390/char/fs3270.c b/drivers/s390/char/fs3270.c
index e712981..9117045 100644
--- a/drivers/s390/char/fs3270.c
+++ b/drivers/s390/char/fs3270.c
@@ -11,6 +11,7 @@
#include <linux/console.h>
#include <linux/init.h>
#include <linux/interrupt.h>
+#include <linux/compat.h>
#include <linux/module.h>
#include <linux/list.h>
#include <linux/slab.h>
diff --git a/drivers/s390/char/vmcp.c b/drivers/s390/char/vmcp.c
index 75bde6a..89c03e6 100644
--- a/drivers/s390/char/vmcp.c
+++ b/drivers/s390/char/vmcp.c
@@ -13,6 +13,7 @@
#include <linux/fs.h>
#include <linux/init.h>
+#include <linux/compat.h>
#include <linux/kernel.h>
#include <linux/miscdevice.h>
#include <linux/slab.h>
diff --git a/drivers/s390/cio/chsc_sch.c b/drivers/s390/cio/chsc_sch.c
index 0c87b0f..8f9a1a3 100644
--- a/drivers/s390/cio/chsc_sch.c
+++ b/drivers/s390/cio/chsc_sch.c
@@ -8,6 +8,7 @@
*/
#include <linux/slab.h>
+#include <linux/compat.h>
#include <linux/device.h>
#include <linux/module.h>
#include <linux/uaccess.h>
diff --git a/drivers/s390/scsi/zfcp_cfdc.c b/drivers/s390/scsi/zfcp_cfdc.c
index 303dde0..fab2c25 100644
--- a/drivers/s390/scsi/zfcp_cfdc.c
+++ b/drivers/s390/scsi/zfcp_cfdc.c
@@ -11,6 +11,7 @@
#define KMSG_COMPONENT "zfcp"
#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
+#include <linux/compat.h>
#include <linux/slab.h>
#include <linux/types.h>
#include <linux/miscdevice.h>
--
1.7.9.1
--
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