From 58ea91c05346f7c6336e6248b743aa9a8e1c19a9 Mon Sep 17 00:00:00 2001
From: Martin Schwidefsky <schwidefsky@de.ibm.com>
Date: Mon, 17 May 2010 10:00:07 +0200
Subject: [PATCH] [S390] avoid default_llseek in s390 drivers

Use nonseekable_open for a couple of s390 device drivers. This avoids
the use of default_llseek function which has a dependency on the BKL.

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
---
 arch/s390/hypfs/inode.c          | 2 +-
 arch/s390/kernel/debug.c         | 1 +
 drivers/s390/char/fs3270.c       | 1 +
 drivers/s390/char/zcore.c        | 4 ++--
 drivers/s390/cio/chsc_sch.c      | 1 +
 drivers/s390/cio/css.c           | 1 +
 drivers/s390/crypto/zcrypt_api.c | 2 +-
 drivers/s390/scsi/zfcp_cfdc.c    | 1 +
 8 files changed, 9 insertions(+), 4 deletions(-)

diff --git a/arch/s390/hypfs/inode.c b/arch/s390/hypfs/inode.c
index c53f8ac825ca..95c1aaac06cd 100644
--- a/arch/s390/hypfs/inode.c
+++ b/arch/s390/hypfs/inode.c
@@ -145,7 +145,7 @@ static int hypfs_open(struct inode *inode, struct file *filp)
 		}
 		mutex_unlock(&fs_info->lock);
 	}
-	return 0;
+	return nonseekable_open(inode, filp);
 }
 
 static ssize_t hypfs_aio_read(struct kiocb *iocb, const struct iovec *iov,
diff --git a/arch/s390/kernel/debug.c b/arch/s390/kernel/debug.c
index 0168472b2fdf..98192261491d 100644
--- a/arch/s390/kernel/debug.c
+++ b/arch/s390/kernel/debug.c
@@ -655,6 +655,7 @@ found:
 	p_info->act_entry_offset = 0;
 	file->private_data = p_info;
 	debug_info_get(debug_info);
+	nonseekable_open(inode, file);
 out:
 	mutex_unlock(&debug_mutex);
 	return rc;
diff --git a/drivers/s390/char/fs3270.c b/drivers/s390/char/fs3270.c
index 0eabcca3c92d..857dfcb7b359 100644
--- a/drivers/s390/char/fs3270.c
+++ b/drivers/s390/char/fs3270.c
@@ -484,6 +484,7 @@ fs3270_open(struct inode *inode, struct file *filp)
 		raw3270_del_view(&fp->view);
 		goto out;
 	}
+	nonseekable_open(inode, filp);
 	filp->private_data = fp;
 out:
 	mutex_unlock(&fs3270_mutex);
diff --git a/drivers/s390/char/zcore.c b/drivers/s390/char/zcore.c
index 7217966f7d31..f5ea3384a4b9 100644
--- a/drivers/s390/char/zcore.c
+++ b/drivers/s390/char/zcore.c
@@ -445,7 +445,7 @@ static int zcore_memmap_open(struct inode *inode, struct file *filp)
 	}
 	kfree(chunk_array);
 	filp->private_data = buf;
-	return 0;
+	return nonseekable_open(inode, filp);
 }
 
 static int zcore_memmap_release(struct inode *inode, struct file *filp)
@@ -473,7 +473,7 @@ static ssize_t zcore_reipl_write(struct file *filp, const char __user *buf,
 
 static int zcore_reipl_open(struct inode *inode, struct file *filp)
 {
-	return 0;
+	return nonseekable_open(inode, filp);
 }
 
 static int zcore_reipl_release(struct inode *inode, struct file *filp)
diff --git a/drivers/s390/cio/chsc_sch.c b/drivers/s390/cio/chsc_sch.c
index 3b6f4adc5094..a83877c664a6 100644
--- a/drivers/s390/cio/chsc_sch.c
+++ b/drivers/s390/cio/chsc_sch.c
@@ -803,6 +803,7 @@ static long chsc_ioctl(struct file *filp, unsigned int cmd,
 
 static const struct file_operations chsc_fops = {
 	.owner = THIS_MODULE,
+	.open = nonseekable_open,
 	.unlocked_ioctl = chsc_ioctl,
 	.compat_ioctl = chsc_ioctl,
 };
diff --git a/drivers/s390/cio/css.c b/drivers/s390/cio/css.c
index da6df0483289..ac94ac751459 100644
--- a/drivers/s390/cio/css.c
+++ b/drivers/s390/cio/css.c
@@ -1065,6 +1065,7 @@ static ssize_t cio_settle_write(struct file *file, const char __user *buf,
 }
 
 static const struct file_operations cio_settle_proc_fops = {
+	.open = nonseekable_open,
 	.write = cio_settle_write,
 };
 
diff --git a/drivers/s390/crypto/zcrypt_api.c b/drivers/s390/crypto/zcrypt_api.c
index 304caf549973..41e0aaefafd5 100644
--- a/drivers/s390/crypto/zcrypt_api.c
+++ b/drivers/s390/crypto/zcrypt_api.c
@@ -302,7 +302,7 @@ static ssize_t zcrypt_write(struct file *filp, const char __user *buf,
 static int zcrypt_open(struct inode *inode, struct file *filp)
 {
 	atomic_inc(&zcrypt_open_count);
-	return 0;
+	return nonseekable_open(inode, filp);
 }
 
 /**
diff --git a/drivers/s390/scsi/zfcp_cfdc.c b/drivers/s390/scsi/zfcp_cfdc.c
index 25d9e0ae9c57..1a2db0a35737 100644
--- a/drivers/s390/scsi/zfcp_cfdc.c
+++ b/drivers/s390/scsi/zfcp_cfdc.c
@@ -254,6 +254,7 @@ static long zfcp_cfdc_dev_ioctl(struct file *file, unsigned int command,
 }
 
 static const struct file_operations zfcp_cfdc_fops = {
+	.open = nonseekable_open,
 	.unlocked_ioctl = zfcp_cfdc_dev_ioctl,
 #ifdef CONFIG_COMPAT
 	.compat_ioctl = zfcp_cfdc_dev_ioctl