crypto: sha512 - reduce stack usage to safe number

[cascardo/linux.git] / block / ioctl.c

diff --git a/block/ioctl.c b/block/ioctl.c
index 9049d46..ca939fc 100644 (file)
--- a/block/ioctl.c
+++ b/block/ioctl.c
@@ -1,5 +1,6 @@
 #include <linux/capability.h>
 #include <linux/blkdev.h>
+#include <linux/export.h>
 #include <linux/gfp.h>
 #include <linux/blkpg.h>
 #include <linux/hdreg.h>
@@ -101,7 +102,7 @@ static int blkdev_reread_part(struct block_device *bdev)
        struct gendisk *disk = bdev->bd_disk;
        int res;
 
-       if (!disk_partitionable(disk) || bdev != bdev->bd_contains)
+       if (!disk_part_scan_enabled(disk) || bdev != bdev->bd_contains)
                return -EINVAL;
        if (!capable(CAP_SYS_ADMIN))
                return -EACCES;
@@ -294,9 +295,11 @@ int blkdev_ioctl(struct block_device *bdev, fmode_t mode, unsigned cmd,
                        return -EINVAL;
                if (get_user(n, (int __user *) arg))
                        return -EFAULT;
-               if (!(mode & FMODE_EXCL) &&
-                   blkdev_get(bdev, mode | FMODE_EXCL, &bdev) < 0)
-                       return -EBUSY;
+               if (!(mode & FMODE_EXCL)) {
+                       bdgrab(bdev);
+                       if (blkdev_get(bdev, mode | FMODE_EXCL, &bdev) < 0)
+                               return -EBUSY;
+               }
                ret = set_blocksize(bdev, n);
                if (!(mode & FMODE_EXCL))
                        blkdev_put(bdev, mode | FMODE_EXCL);