1 files changed, 17 insertions, 11 deletions

diff --git a/block/ioctl.c b/block/ioctl.c
index e1109491c234..9cfa2e1ecb24 100644
--- a/block/ioctl.c
+++ b/block/ioctl.c
@@ -5,6 +5,7 @@
 #include <linux/backing-dev.h>
 #include <linux/buffer_head.h>
 #include <linux/smp_lock.h>
+#include <linux/blktrace_api.h>
 #include <asm/uaccess.h>
 
 static int blkpg_ioctl(struct block_device *bdev, struct blkpg_ioctl_arg __user *arg)
@@ -42,9 +43,9 @@ static int blkpg_ioctl(struct block_device *bdev, struct blkpg_ioctl_arg __user
                                         return -EINVAL;
                         }
                         /* partition number in use? */
-                        down(&bdev->bd_sem);
+                        mutex_lock(&bdev->bd_mutex);
                         if (disk->part[part - 1]) {
-                                up(&bdev->bd_sem);
+                                mutex_unlock(&bdev->bd_mutex);
                                 return -EBUSY;
                         }
                         /* overlap? */
@@ -55,13 +56,13 @@ static int blkpg_ioctl(struct block_device *bdev, struct blkpg_ioctl_arg __user
                                         continue;
                                 if (!(start+length <= s->start_sect ||
                                       start >= s->start_sect + s->nr_sects)) {
-                                        up(&bdev->bd_sem);
+                                        mutex_unlock(&bdev->bd_mutex);
                                         return -EBUSY;
                                 }
                         }
                         /* all seems OK */
                         add_partition(disk, part, start, length);
-                        up(&bdev->bd_sem);
+                        mutex_unlock(&bdev->bd_mutex);
                         return 0;
                 case BLKPG_DEL_PARTITION:
                         if (!disk->part[part-1])
@@ -71,9 +72,9 @@ static int blkpg_ioctl(struct block_device *bdev, struct blkpg_ioctl_arg __user
                         bdevp = bdget_disk(disk, part);
                         if (!bdevp)
                                 return -ENOMEM;
-                        down(&bdevp->bd_sem);
+                        mutex_lock(&bdevp->bd_mutex);
                         if (bdevp->bd_openers) {
-                                up(&bdevp->bd_sem);
+                                mutex_unlock(&bdevp->bd_mutex);
                                 bdput(bdevp);
                                 return -EBUSY;
                         }
@@ -81,10 +82,10 @@ static int blkpg_ioctl(struct block_device *bdev, struct blkpg_ioctl_arg __user
                         fsync_bdev(bdevp);
                         invalidate_bdev(bdevp, 0);
 
-                        down(&bdev->bd_sem);
+                        mutex_lock(&bdev->bd_mutex);
                         delete_partition(disk, part);
-                        up(&bdev->bd_sem);
-                        up(&bdevp->bd_sem);
+                        mutex_unlock(&bdev->bd_mutex);
+                        mutex_unlock(&bdevp->bd_mutex);
                         bdput(bdevp);
 
                         return 0;
@@ -102,10 +103,10 @@ static int blkdev_reread_part(struct block_device *bdev)
                 return -EINVAL;
         if (!capable(CAP_SYS_ADMIN))
                 return -EACCES;
-        if (down_trylock(&bdev->bd_sem))
+        if (!mutex_trylock(&bdev->bd_mutex))
                 return -EBUSY;
         res = rescan_partitions(disk, bdev);
-        up(&bdev->bd_sem);
+        mutex_unlock(&bdev->bd_mutex);
         return res;
 }
 
@@ -189,6 +190,11 @@ static int blkdev_locked_ioctl(struct file *file, struct block_device *bdev,
                 return put_ulong(arg, bdev->bd_inode->i_size >> 9);
         case BLKGETSIZE64:
                 return put_u64(arg, bdev->bd_inode->i_size);
+        case BLKTRACESTART:
+        case BLKTRACESTOP:
+        case BLKTRACESETUP:
+        case BLKTRACETEARDOWN:
+                return blk_trace_ioctl(bdev, cmd, (char __user *) arg);
         }
         return -ENOIOCTLCMD;
 }