block: push down BKL into .locked_ioctl

As a preparation for the removal of the big kernel
lock in the block layer, this removes the BKL
from the common ioctl handling code, moving it
into every single driver still using it.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Christoph Hellwig <hch@infradead.org>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>

17 files changed, 159 insertions, 32 deletions

diff --git a/drivers/block/amiflop.c b/drivers/block/amiflop.c
index 832798aa14f6..0fa26359304c 100644
--- a/drivers/block/amiflop.c
+++ b/drivers/block/amiflop.c
@@ -60,6 +60,7 @@
 #include <linux/hdreg.h>
 #include <linux/delay.h>
 #include <linux/init.h>
+#include <linux/smp_lock.h>
 #include <linux/amifdreg.h>
 #include <linux/amifd.h>
 #include <linux/buffer_head.h>
@@ -1423,7 +1424,7 @@ static int fd_getgeo(struct block_device *bdev, struct hd_geometry *geo)
 	return 0;
 }
 
-static int fd_ioctl(struct block_device *bdev, fmode_t mode,
+static int fd_locked_ioctl(struct block_device *bdev, fmode_t mode,
 		    unsigned int cmd, unsigned long param)
 {
 	struct amiga_floppy_struct *p = bdev->bd_disk->private_data;
@@ -1500,6 +1501,18 @@ static int fd_ioctl(struct block_device *bdev, fmode_t mode,
 	return 0;
 }
 
+static int fd_ioctl(struct block_device *bdev, fmode_t mode,
+			     unsigned int cmd, unsigned long param)
+{
+	int ret;
+
+	lock_kernel();
+	ret = fd_locked_ioctl(bdev, mode, cmd, param);
+	unlock_kernel();
+
+	return ret;
+}
+
 static void fd_probe(int dev)
 {
 	unsigned long code;
@@ -1638,7 +1651,7 @@ static const struct block_device_operations floppy_fops = {
 	.owner		= THIS_MODULE,
 	.open		= floppy_open,
 	.release	= floppy_release,
-	.locked_ioctl	= fd_ioctl,
+	.ioctl		= fd_ioctl,
 	.getgeo		= fd_getgeo,
 	.media_changed	= amiga_floppy_change,
 };
diff --git a/drivers/block/ataflop.c b/drivers/block/ataflop.c
index e35cf59cbfde..1bb8bfcfdbd9 100644
--- a/drivers/block/ataflop.c
+++ b/drivers/block/ataflop.c
@@ -67,6 +67,7 @@
 #include <linux/delay.h>
 #include <linux/init.h>
 #include <linux/blkdev.h>
+#include <linux/smp_lock.h>
 
 #include <asm/atafd.h>
 #include <asm/atafdreg.h>
@@ -359,7 +360,7 @@ static void finish_fdc( void );
 static void finish_fdc_done( int dummy );
 static void setup_req_params( int drive );
 static void redo_fd_request( void);
-static int fd_ioctl(struct block_device *bdev, fmode_t mode, unsigned int
+static int fd_locked_ioctl(struct block_device *bdev, fmode_t mode, unsigned int
                      cmd, unsigned long param);
 static void fd_probe( int drive );
 static int fd_test_drive_present( int drive );
@@ -1480,7 +1481,7 @@ void do_fd_request(struct request_queue * q)
 	atari_enable_irq( IRQ_MFP_FDC );
 }
 
-static int fd_ioctl(struct block_device *bdev, fmode_t mode,
+static int fd_locked_ioctl(struct block_device *bdev, fmode_t mode,
 		    unsigned int cmd, unsigned long param)
 {
 	struct gendisk *disk = bdev->bd_disk;
@@ -1665,6 +1666,17 @@ static int fd_ioctl(struct block_device *bdev, fmode_t mode,
 	}
 }
 
+static int fd_ioctl(struct block_device *bdev, fmode_t mode,
+			     unsigned int cmd, unsigned long arg)
+{
+	int ret;
+
+	lock_kernel();
+	ret = fd_locked_ioctl(bdev, mode, cmd, arg);
+	unlock_kernel();
+
+	return ret;
+}
 
 /* Initialize the 'unit' variable for drive 'drive' */
 
@@ -1855,7 +1867,7 @@ static const struct block_device_operations floppy_fops = {
 	.owner		= THIS_MODULE,
 	.open		= floppy_open,
 	.release	= floppy_release,
-	.locked_ioctl	= fd_ioctl,
+	.ioctl		= fd_ioctl,
 	.media_changed	= check_floppy_change,
 	.revalidate_disk= floppy_revalidate,
 };
diff --git a/drivers/block/brd.c b/drivers/block/brd.c
index 1d2c18620f9a..1c7f63792ff8 100644
--- a/drivers/block/brd.c
+++ b/drivers/block/brd.c
@@ -15,6 +15,7 @@
 #include <linux/blkdev.h>
 #include <linux/bio.h>
 #include <linux/highmem.h>
+#include <linux/smp_lock.h>
 #include <linux/radix-tree.h>
 #include <linux/buffer_head.h> /* invalidate_bh_lrus() */
 #include <linux/slab.h>
@@ -401,6 +402,7 @@ static int brd_ioctl(struct block_device *bdev, fmode_t mode,
 	 * ram device BLKFLSBUF has special semantics, we want to actually
 	 * release and destroy the ramdisk data.
 	 */
+	lock_kernel();
 	mutex_lock(&bdev->bd_mutex);
 	error = -EBUSY;
 	if (bdev->bd_openers <= 1) {
@@ -417,13 +419,14 @@ static int brd_ioctl(struct block_device *bdev, fmode_t mode,
 		error = 0;
 	}
 	mutex_unlock(&bdev->bd_mutex);
+	unlock_kernel();
 
 	return error;
 }
 
 static const struct block_device_operations brd_fops = {
 	.owner =		THIS_MODULE,
-	.locked_ioctl =		brd_ioctl,
+	.ioctl =		brd_ioctl,
 #ifdef CONFIG_BLK_DEV_XIP
 	.direct_access =	brd_direct_access,
 #endif
diff --git a/drivers/block/cciss.c b/drivers/block/cciss.c
index 11b377762b8e..a6c0494dd054 100644
--- a/drivers/block/cciss.c
+++ b/drivers/block/cciss.c
@@ -179,6 +179,8 @@ static irqreturn_t do_cciss_intx(int irq, void *dev_id);
 static irqreturn_t do_cciss_msix_intr(int irq, void *dev_id);
 static int cciss_open(struct block_device *bdev, fmode_t mode);
 static int cciss_release(struct gendisk *disk, fmode_t mode);
+static int do_ioctl(struct block_device *bdev, fmode_t mode,
+		    unsigned int cmd, unsigned long arg);
 static int cciss_ioctl(struct block_device *bdev, fmode_t mode,
 		       unsigned int cmd, unsigned long arg);
 static int cciss_getgeo(struct block_device *bdev, struct hd_geometry *geo);
@@ -237,7 +239,7 @@ static const struct block_device_operations cciss_fops = {
 	.owner = THIS_MODULE,
 	.open = cciss_open,
 	.release = cciss_release,
-	.locked_ioctl = cciss_ioctl,
+	.ioctl = do_ioctl,
 	.getgeo = cciss_getgeo,
 #ifdef CONFIG_COMPAT
 	.compat_ioctl = cciss_compat_ioctl,
@@ -1057,8 +1059,6 @@ static int cciss_release(struct gendisk *disk, fmode_t mode)
 	return 0;
 }
 
-#ifdef CONFIG_COMPAT
-
 static int do_ioctl(struct block_device *bdev, fmode_t mode,
 		    unsigned cmd, unsigned long arg)
 {
@@ -1069,6 +1069,8 @@ static int do_ioctl(struct block_device *bdev, fmode_t mode,
 	return ret;
 }
 
+#ifdef CONFIG_COMPAT
+
 static int cciss_ioctl32_passthru(struct block_device *bdev, fmode_t mode,
 				  unsigned cmd, unsigned long arg);
 static int cciss_ioctl32_big_passthru(struct block_device *bdev, fmode_t mode,
diff --git a/drivers/block/cpqarray.c b/drivers/block/cpqarray.c
index abb4ec6690fc..c459aeea3c0c 100644
--- a/drivers/block/cpqarray.c
+++ b/drivers/block/cpqarray.c
@@ -35,6 +35,7 @@
 #include <linux/seq_file.h>
 #include <linux/init.h>
 #include <linux/hdreg.h>
+#include <linux/smp_lock.h>
 #include <linux/spinlock.h>
 #include <linux/blkdev.h>
 #include <linux/genhd.h>
@@ -197,7 +198,7 @@ static const struct block_device_operations ida_fops  = {
 	.owner		= THIS_MODULE,
 	.open		= ida_open,
 	.release	= ida_release,
-	.locked_ioctl	= ida_ioctl,
+	.ioctl		= ida_ioctl,
 	.getgeo		= ida_getgeo,
 	.revalidate_disk= ida_revalidate,
 };
@@ -1128,7 +1129,7 @@ static int ida_getgeo(struct block_device *bdev, struct hd_geometry *geo)
  *  ida_ioctl does some miscellaneous stuff like reporting drive geometry,
  *  setting readahead and submitting commands from userspace to the controller.
  */
-static int ida_ioctl(struct block_device *bdev, fmode_t mode, unsigned int cmd, unsigned long arg)
+static int ida_locked_ioctl(struct block_device *bdev, fmode_t mode, unsigned int cmd, unsigned long arg)
 {
 	drv_info_t *drv = get_drv(bdev->bd_disk);
 	ctlr_info_t *host = get_host(bdev->bd_disk);
@@ -1192,6 +1193,19 @@ out_passthru:
 	}
 		
 }
+
+static int ida_ioctl(struct block_device *bdev, fmode_t mode,
+			     unsigned int cmd, unsigned long param)
+{
+	int ret;
+
+	lock_kernel();
+	ret = ida_locked_ioctl(bdev, mode, cmd, param);
+	unlock_kernel();
+
+	return ret;
+}
+
 /*
  * ida_ctlr_ioctl is for passing commands to the controller from userspace.
  * The command block (io) has already been copied to kernel space for us,
diff --git a/drivers/block/floppy.c b/drivers/block/floppy.c
index 82c30f9f81ca..40419b066aa9 100644
--- a/drivers/block/floppy.c
+++ b/drivers/block/floppy.c
@@ -178,6 +178,7 @@ static int print_unex = 1;
 #include <linux/slab.h>
 #include <linux/mm.h>
 #include <linux/bio.h>
+#include <linux/smp_lock.h>
 #include <linux/string.h>
 #include <linux/jiffies.h>
 #include <linux/fcntl.h>
@@ -3371,7 +3372,7 @@ static int fd_getgeo(struct block_device *bdev, struct hd_geometry *geo)
 	return 0;
 }
 
-static int fd_ioctl(struct block_device *bdev, fmode_t mode, unsigned int cmd,
+static int fd_locked_ioctl(struct block_device *bdev, fmode_t mode, unsigned int cmd,
 		    unsigned long param)
 {
 	int drive = (long)bdev->bd_disk->private_data;
@@ -3547,6 +3548,18 @@ static int fd_ioctl(struct block_device *bdev, fmode_t mode, unsigned int cmd,
 	return 0;
 }
 
+static int fd_ioctl(struct block_device *bdev, fmode_t mode,
+			     unsigned int cmd, unsigned long param)
+{
+	int ret;
+
+	lock_kernel();
+	ret = fd_locked_ioctl(bdev, mode, cmd, param);
+	unlock_kernel();
+
+	return ret;
+}
+
 static void __init config_types(void)
 {
 	bool has_drive = false;
@@ -3848,7 +3861,7 @@ static const struct block_device_operations floppy_fops = {
 	.owner			= THIS_MODULE,
 	.open			= floppy_open,
 	.release		= floppy_release,
-	.locked_ioctl		= fd_ioctl,
+	.ioctl			= fd_ioctl,
 	.getgeo			= fd_getgeo,
 	.media_changed		= check_floppy_change,
 	.revalidate_disk	= floppy_revalidate,
diff --git a/drivers/block/nbd.c b/drivers/block/nbd.c
index 2e74e7d475ca..6751789fb379 100644
--- a/drivers/block/nbd.c
+++ b/drivers/block/nbd.c
@@ -24,6 +24,7 @@
 #include <linux/errno.h>
 #include <linux/file.h>
 #include <linux/ioctl.h>
+#include <linux/smp_lock.h>
 #include <linux/compiler.h>
 #include <linux/err.h>
 #include <linux/kernel.h>
@@ -716,9 +717,11 @@ static int nbd_ioctl(struct block_device *bdev, fmode_t mode,
 	dprintk(DBG_IOCTL, "%s: nbd_ioctl cmd=%s(0x%x) arg=%lu\n",
 			lo->disk->disk_name, ioctl_cmd_to_ascii(cmd), cmd, arg);
 
+	lock_kernel();
 	mutex_lock(&lo->tx_lock);
 	error = __nbd_ioctl(bdev, lo, cmd, arg);
 	mutex_unlock(&lo->tx_lock);
+	unlock_kernel();
 
 	return error;
 }
@@ -726,7 +729,7 @@ static int nbd_ioctl(struct block_device *bdev, fmode_t mode,
 static const struct block_device_operations nbd_fops =
 {
 	.owner =	THIS_MODULE,
-	.locked_ioctl =	nbd_ioctl,
+	.ioctl =	nbd_ioctl,
 };
 
 /*
diff --git a/drivers/block/paride/pcd.c b/drivers/block/paride/pcd.c
index 71acf4e53356..daba7a62a663 100644
--- a/drivers/block/paride/pcd.c
+++ b/drivers/block/paride/pcd.c
@@ -138,6 +138,7 @@ enum {D_PRT, D_PRO, D_UNI, D_MOD, D_SLV, D_DLY};
 #include <linux/cdrom.h>
 #include <linux/spinlock.h>
 #include <linux/blkdev.h>
+#include <linux/smp_lock.h>
 #include <asm/uaccess.h>
 
 static DEFINE_SPINLOCK(pcd_lock);
@@ -238,7 +239,13 @@ static int pcd_block_ioctl(struct block_device *bdev, fmode_t mode,
 				unsigned cmd, unsigned long arg)
 {
 	struct pcd_unit *cd = bdev->bd_disk->private_data;
-	return cdrom_ioctl(&cd->info, bdev, mode, cmd, arg);
+	int ret;
+
+	lock_kernel();
+	ret = cdrom_ioctl(&cd->info, bdev, mode, cmd, arg);
+	unlock_kernel();
+
+	return ret;
 }
 
 static int pcd_block_media_changed(struct gendisk *disk)
@@ -251,7 +258,7 @@ static const struct block_device_operations pcd_bdops = {
 	.owner		= THIS_MODULE,
 	.open		= pcd_block_open,
 	.release	= pcd_block_release,
-	.locked_ioctl	= pcd_block_ioctl,
+	.ioctl		= pcd_block_ioctl,
 	.media_changed	= pcd_block_media_changed,
 };
 
diff --git a/drivers/block/paride/pd.c b/drivers/block/paride/pd.c
index 4e8b9bff3abe..c4d6ed9846ca 100644
--- a/drivers/block/paride/pd.c
+++ b/drivers/block/paride/pd.c
@@ -153,6 +153,7 @@ enum {D_PRT, D_PRO, D_UNI, D_MOD, D_GEO, D_SBY, D_DLY, D_SLV};
 #include <linux/blkdev.h>
 #include <linux/blkpg.h>
 #include <linux/kernel.h>
+#include <linux/smp_lock.h>
 #include <asm/uaccess.h>
 #include <linux/workqueue.h>
 
@@ -768,8 +769,10 @@ static int pd_ioctl(struct block_device *bdev, fmode_t mode,
 
 	switch (cmd) {
 	case CDROMEJECT:
+		lock_kernel();
 		if (disk->access == 1)
 			pd_special_command(disk, pd_eject);
+		unlock_kernel();
 		return 0;
 	default:
 		return -EINVAL;
@@ -812,7 +815,7 @@ static const struct block_device_operations pd_fops = {
 	.owner		= THIS_MODULE,
 	.open		= pd_open,
 	.release	= pd_release,
-	.locked_ioctl	= pd_ioctl,
+	.ioctl		= pd_ioctl,
 	.getgeo		= pd_getgeo,
 	.media_changed	= pd_check_media,
 	.revalidate_disk= pd_revalidate
diff --git a/drivers/block/paride/pf.c b/drivers/block/paride/pf.c
index c059aab3006b..38b4d566b816 100644
--- a/drivers/block/paride/pf.c
+++ b/drivers/block/paride/pf.c
@@ -152,6 +152,7 @@ enum {D_PRT, D_PRO, D_UNI, D_MOD, D_SLV, D_LUN, D_DLY};
 #include <linux/spinlock.h>
 #include <linux/blkdev.h>
 #include <linux/blkpg.h>
+#include <linux/smp_lock.h>
 #include <asm/uaccess.h>
 
 static DEFINE_SPINLOCK(pf_spin_lock);
@@ -266,7 +267,7 @@ static const struct block_device_operations pf_fops = {
 	.owner		= THIS_MODULE,
 	.open		= pf_open,
 	.release	= pf_release,
-	.locked_ioctl	= pf_ioctl,
+	.ioctl		= pf_ioctl,
 	.getgeo		= pf_getgeo,
 	.media_changed	= pf_check_media,
 };
@@ -342,7 +343,10 @@ static int pf_ioctl(struct block_device *bdev, fmode_t mode, unsigned int cmd, u
 
 	if (pf->access != 1)
 		return -EBUSY;
+	lock_kernel();
 	pf_eject(pf);
+	unlock_kernel();
+
 	return 0;
 }
 
diff --git a/drivers/block/pktcdvd.c b/drivers/block/pktcdvd.c
index 9f3e4454274b..40f1e31f42c4 100644
--- a/drivers/block/pktcdvd.c
+++ b/drivers/block/pktcdvd.c
@@ -57,6 +57,7 @@
 #include <linux/seq_file.h>
 #include <linux/miscdevice.h>
 #include <linux/freezer.h>
+#include <linux/smp_lock.h>
 #include <linux/mutex.h>
 #include <linux/slab.h>
 #include <scsi/scsi_cmnd.h>
@@ -2762,10 +2763,12 @@ out_mem:
 static int pkt_ioctl(struct block_device *bdev, fmode_t mode, unsigned int cmd, unsigned long arg)
 {
 	struct pktcdvd_device *pd = bdev->bd_disk->private_data;
+	int ret;
 
 	VPRINTK("pkt_ioctl: cmd %x, dev %d:%d\n", cmd,
 		MAJOR(bdev->bd_dev), MINOR(bdev->bd_dev));
 
+	lock_kernel();
 	switch (cmd) {
 	case CDROMEJECT:
 		/*
@@ -2783,14 +2786,16 @@ static int pkt_ioctl(struct block_device *bdev, fmode_t mode, unsigned int cmd,
 	case CDROM_LAST_WRITTEN:
 	case CDROM_SEND_PACKET:
 	case SCSI_IOCTL_SEND_COMMAND:
-		return __blkdev_driver_ioctl(pd->bdev, mode, cmd, arg);
+		ret = __blkdev_driver_ioctl(pd->bdev, mode, cmd, arg);
+		break;
 
 	default:
 		VPRINTK(DRIVER_NAME": Unknown ioctl for %s (%x)\n", pd->name, cmd);
-		return -ENOTTY;
+		ret = -ENOTTY;
 	}
+	unlock_kernel();
 
-	return 0;
+	return ret;
 }
 
 static int pkt_media_changed(struct gendisk *disk)
@@ -2812,7 +2817,7 @@ static const struct block_device_operations pktcdvd_ops = {
 	.owner =		THIS_MODULE,
 	.open =			pkt_open,
 	.release =		pkt_close,
-	.locked_ioctl =		pkt_ioctl,
+	.ioctl =		pkt_ioctl,
 	.media_changed =	pkt_media_changed,
 };
 
diff --git a/drivers/block/swim.c b/drivers/block/swim.c
index e463657569ff..f04f74e3758f 100644
--- a/drivers/block/swim.c
+++ b/drivers/block/swim.c
@@ -20,6 +20,7 @@
 #include <linux/fd.h>
 #include <linux/slab.h>
 #include <linux/blkdev.h>
+#include <linux/smp_lock.h>
 #include <linux/hdreg.h>
 #include <linux/kernel.h>
 #include <linux/delay.h>
@@ -690,7 +691,9 @@ static int floppy_ioctl(struct block_device *bdev, fmode_t mode,
 	case FDEJECT:
 		if (fs->ref_count != 1)
 			return -EBUSY;
+		lock_kernel();
 		err = floppy_eject(fs);
+		unlock_kernel();
 		return err;
 
 	case FDGETPRM:
@@ -753,7 +756,7 @@ static const struct block_device_operations floppy_fops = {
 	.owner		 = THIS_MODULE,
 	.open		 = floppy_open,
 	.release	 = floppy_release,
-	.locked_ioctl	 = floppy_ioctl,
+	.ioctl		 = floppy_ioctl,
 	.getgeo		 = floppy_getgeo,
 	.media_changed	 = floppy_check_change,
 	.revalidate_disk = floppy_revalidate,
diff --git a/drivers/block/swim3.c b/drivers/block/swim3.c
index ed6fb91123ab..f3657b2a5386 100644
--- a/drivers/block/swim3.c
+++ b/drivers/block/swim3.c
@@ -25,6 +25,7 @@
 #include <linux/ioctl.h>
 #include <linux/blkdev.h>
 #include <linux/interrupt.h>
+#include <linux/smp_lock.h>
 #include <linux/module.h>
 #include <linux/spinlock.h>
 #include <asm/io.h>
@@ -839,7 +840,7 @@ static int fd_eject(struct floppy_state *fs)
 static struct floppy_struct floppy_type =
 	{ 2880,18,2,80,0,0x1B,0x00,0xCF,0x6C,NULL };	/*  7 1.44MB 3.5"   */
 
-static int floppy_ioctl(struct block_device *bdev, fmode_t mode,
+static int floppy_locked_ioctl(struct block_device *bdev, fmode_t mode,
 			unsigned int cmd, unsigned long param)
 {
 	struct floppy_state *fs = bdev->bd_disk->private_data;
@@ -867,6 +868,18 @@ static int floppy_ioctl(struct block_device *bdev, fmode_t mode,
 	return -ENOTTY;
 }
 
+static int floppy_ioctl(struct block_device *bdev, fmode_t mode,
+				 unsigned int cmd, unsigned long param)
+{
+	int ret;
+
+	lock_kernel();
+	ret = floppy_locked_ioctl(bdev, mode, cmd, param);
+	unlock_kernel();
+
+	return ret;
+}
+
 static int floppy_open(struct block_device *bdev, fmode_t mode)
 {
 	struct floppy_state *fs = bdev->bd_disk->private_data;
@@ -997,7 +1010,7 @@ static int floppy_revalidate(struct gendisk *disk)
 static const struct block_device_operations floppy_fops = {
 	.open		= floppy_open,
 	.release	= floppy_release,
-	.locked_ioctl	= floppy_ioctl,
+	.ioctl		= floppy_ioctl,
 	.media_changed	= floppy_check_change,
 	.revalidate_disk= floppy_revalidate,
 };
diff --git a/drivers/block/ub.c b/drivers/block/ub.c
index aaf27fb4efd6..102ed52d0e0f 100644
--- a/drivers/block/ub.c
+++ b/drivers/block/ub.c
@@ -28,6 +28,7 @@
 #include <linux/timer.h>
 #include <linux/scatterlist.h>
 #include <linux/slab.h>
+#include <linux/smp_lock.h>
 #include <scsi/scsi.h>
 
 #define DRV_NAME "ub"
@@ -1729,8 +1730,13 @@ static int ub_bd_ioctl(struct block_device *bdev, fmode_t mode,
 {
 	struct gendisk *disk = bdev->bd_disk;
 	void __user *usermem = (void __user *) arg;
+	int ret;
+
+	lock_kernel();
+	ret = scsi_cmd_ioctl(disk->queue, disk, mode, cmd, usermem);
+	unlock_kernel();
 
-	return scsi_cmd_ioctl(disk->queue, disk, mode, cmd, usermem);
+	return ret;
 }
 
 /*
@@ -1794,7 +1800,7 @@ static const struct block_device_operations ub_bd_fops = {
 	.owner		= THIS_MODULE,
 	.open		= ub_bd_open,
 	.release	= ub_bd_release,
-	.locked_ioctl	= ub_bd_ioctl,
+	.ioctl		= ub_bd_ioctl,
 	.media_changed	= ub_bd_media_changed,
 	.revalidate_disk = ub_bd_revalidate,
 };
diff --git a/drivers/block/virtio_blk.c b/drivers/block/virtio_blk.c
index 0a3222fd4442..7b0f7b624adf 100644
--- a/drivers/block/virtio_blk.c
+++ b/drivers/block/virtio_blk.c
@@ -2,6 +2,7 @@
 #include <linux/spinlock.h>
 #include <linux/slab.h>
 #include <linux/blkdev.h>
+#include <linux/smp_lock.h>
 #include <linux/hdreg.h>
 #include <linux/virtio.h>
 #include <linux/virtio_blk.h>
@@ -217,7 +218,7 @@ static int virtblk_get_id(struct gendisk *disk, char *id_str)
 	return blk_execute_rq(vblk->disk->queue, vblk->disk, req, false);
 }
 
-static int virtblk_ioctl(struct block_device *bdev, fmode_t mode,
+static int virtblk_locked_ioctl(struct block_device *bdev, fmode_t mode,
 			 unsigned cmd, unsigned long data)
 {
 	struct gendisk *disk = bdev->bd_disk;
@@ -243,6 +244,18 @@ static int virtblk_ioctl(struct block_device *bdev, fmode_t mode,
 			      (void __user *)data);
 }
 
+static int virtblk_ioctl(struct block_device *bdev, fmode_t mode,
+			     unsigned int cmd, unsigned long param)
+{
+	int ret;
+
+	lock_kernel();
+	ret = virtblk_locked_ioctl(bdev, mode, cmd, param);
+	unlock_kernel();
+
+	return ret;
+}
+
 /* We provide getgeo only to please some old bootloader/partitioning tools */
 static int virtblk_getgeo(struct block_device *bd, struct hd_geometry *geo)
 {
@@ -269,7 +282,7 @@ static int virtblk_getgeo(struct block_device *bd, struct hd_geometry *geo)
 }
 
 static const struct block_device_operations virtblk_fops = {
-	.locked_ioctl = virtblk_ioctl,
+	.ioctl  = virtblk_ioctl,
 	.owner  = THIS_MODULE,
 	.getgeo = virtblk_getgeo,
 };
diff --git a/drivers/block/xd.c b/drivers/block/xd.c
index b16a3a926cf2..d5a3cd750561 100644
--- a/drivers/block/xd.c
+++ b/drivers/block/xd.c
@@ -46,6 +46,7 @@
 #include <linux/init.h>
 #include <linux/wait.h>
 #include <linux/blkdev.h>
+#include <linux/smp_lock.h>
 #include <linux/blkpg.h>
 #include <linux/delay.h>
 #include <linux/io.h>
@@ -133,7 +134,7 @@ static int xd_getgeo(struct block_device *bdev, struct hd_geometry *geo);
 
 static const struct block_device_operations xd_fops = {
 	.owner	= THIS_MODULE,
-	.locked_ioctl	= xd_ioctl,
+	.ioctl	= xd_ioctl,
 	.getgeo = xd_getgeo,
 };
 static DECLARE_WAIT_QUEUE_HEAD(xd_wait_int);
@@ -347,7 +348,7 @@ static int xd_getgeo(struct block_device *bdev, struct hd_geometry *geo)
 }
 
 /* xd_ioctl: handle device ioctl's */
-static int xd_ioctl(struct block_device *bdev, fmode_t mode, u_int cmd, u_long arg)
+static int xd_locked_ioctl(struct block_device *bdev, fmode_t mode, u_int cmd, u_long arg)
 {
 	switch (cmd) {
 		case HDIO_SET_DMA:
@@ -375,6 +376,18 @@ static int xd_ioctl(struct block_device *bdev, fmode_t mode, u_int cmd, u_long a
 	}
 }
 
+static int xd_ioctl(struct block_device *bdev, fmode_t mode,
+			     unsigned int cmd, unsigned long param)
+{
+	int ret;
+
+	lock_kernel();
+	ret = xd_locked_ioctl(bdev, mode, cmd, param);
+	unlock_kernel();
+
+	return ret;
+}
+
 /* xd_readwrite: handle a read/write request */
 static int xd_readwrite (u_char operation,XD_INFO *p,char *buffer,u_int block,u_int count)
 {
diff --git a/drivers/block/xen-blkfront.c b/drivers/block/xen-blkfront.c
index 76af65b654e3..9119cd3d56a4 100644
--- a/drivers/block/xen-blkfront.c
+++ b/drivers/block/xen-blkfront.c
@@ -1045,7 +1045,7 @@ static const struct block_device_operations xlvbd_block_fops =
 	.open = blkif_open,
 	.release = blkif_release,
 	.getgeo = blkif_getgeo,
-	.locked_ioctl = blkif_ioctl,
+	.ioctl = blkif_ioctl,
 };