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-rw-r--r--block/genhd.c4
-rw-r--r--block/ioctl.c2
-rw-r--r--fs/block_dev.c2
-rw-r--r--include/linux/genhd.h6
4 files changed, 8 insertions, 6 deletions
diff --git a/block/genhd.c b/block/genhd.c
index 5cb51c5..2429ecb 100644
--- a/block/genhd.c
+++ b/block/genhd.c
@@ -536,7 +536,7 @@ void register_disk(struct gendisk *disk)
disk->slave_dir = kobject_create_and_add("slaves", &ddev->kobj);
/* No minors to use for partitions */
- if (!disk_partitionable(disk))
+ if (!disk_part_scan_enabled(disk))
goto exit;
/* No such device (e.g., media were just removed) */
@@ -841,7 +841,7 @@ static int show_partition(struct seq_file *seqf, void *v)
char buf[BDEVNAME_SIZE];
/* Don't show non-partitionable removeable devices or empty devices */
- if (!get_capacity(sgp) || (!disk_partitionable(sgp) &&
+ if (!get_capacity(sgp) || (!disk_max_parts(sgp) &&
(sgp->flags & GENHD_FL_REMOVABLE)))
return 0;
if (sgp->flags & GENHD_FL_SUPPRESS_PARTITION_INFO)
diff --git a/block/ioctl.c b/block/ioctl.c
index 1124cd2..5c74efc 100644
--- a/block/ioctl.c
+++ b/block/ioctl.c
@@ -101,7 +101,7 @@ 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;
diff --git a/fs/block_dev.c b/fs/block_dev.c
index ff77262..0bed0d4 100644
--- a/fs/block_dev.c
+++ b/fs/block_dev.c
@@ -971,7 +971,7 @@ static void flush_disk(struct block_device *bdev, bool kill_dirty)
if (!bdev->bd_disk)
return;
- if (disk_partitionable(bdev->bd_disk))
+ if (disk_part_scan_enabled(bdev->bd_disk))
bdev->bd_invalidated = 1;
}
diff --git a/include/linux/genhd.h b/include/linux/genhd.h
index 02fa469..6d18f35 100644
--- a/include/linux/genhd.h
+++ b/include/linux/genhd.h
@@ -128,6 +128,7 @@ struct hd_struct {
#define GENHD_FL_EXT_DEVT 64 /* allow extended devt */
#define GENHD_FL_NATIVE_CAPACITY 128
#define GENHD_FL_BLOCK_EVENTS_ON_EXCL_WRITE 256
+#define GENHD_FL_NO_PART_SCAN 512
enum {
DISK_EVENT_MEDIA_CHANGE = 1 << 0, /* media changed */
@@ -234,9 +235,10 @@ static inline int disk_max_parts(struct gendisk *disk)
return disk->minors;
}
-static inline bool disk_partitionable(struct gendisk *disk)
+static inline bool disk_part_scan_enabled(struct gendisk *disk)
{
- return disk_max_parts(disk) > 1;
+ return disk_max_parts(disk) > 1 &&
+ !(disk->flags & GENHD_FL_NO_PART_SCAN);
}
static inline dev_t disk_devt(struct gendisk *disk)
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