[PATCH 4/8] bdev: move ->bd_read_only to ->__bd_flags

[Al Viro <viro@zeniv.linux.org.uk>]

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---
 block/ioctl.c             | 5 ++++-
 include/linux/blk_types.h | 5 ++++-
 include/linux/blkdev.h    | 4 ++--
 3 files changed, 10 insertions(+), 4 deletions(-)

diff --git a/block/ioctl.c b/block/ioctl.c
index 0c76137adcaa..be173e4ff43d 100644
--- a/block/ioctl.c
+++ b/block/ioctl.c
@@ -402,7 +402,10 @@ static int blkdev_roset(struct block_device *bdev, unsigned cmd,
 		if (ret)
 			return ret;
 	}
-	bdev->bd_read_only = n;
+	if (n)
+		bdev_set_flag(bdev, BD_READ_ONLY);
+	else
+		bdev_clear_flag(bdev, BD_READ_ONLY);
 	return 0;
 }
 
diff --git a/include/linux/blk_types.h b/include/linux/blk_types.h
index 274f7eb4138f..1aa41b651614 100644
--- a/include/linux/blk_types.h
+++ b/include/linux/blk_types.h
@@ -46,7 +46,6 @@ struct block_device {
 	struct disk_stats __percpu *bd_stats;
 	unsigned long		bd_stamp;
 	u32			__bd_flags;	// partition number + flags
-	bool			bd_read_only;	/* read-only policy */
 	bool			bd_write_holder;
 	bool			bd_has_submit_bio;
 	dev_t			bd_dev;
@@ -86,6 +85,10 @@ struct block_device {
 #define bdev_kobj(_bdev) \
 	(&((_bdev)->bd_device.kobj))
 
+enum {
+	BD_READ_ONLY,		// read-only policy
+};
+
 /*
  * Block error status values.  See block/blk-core:blk_errors for the details.
  * Alpha cannot write a byte atomically, so we need to use 32-bit value.
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index b9dbfb811533..d556cec9224b 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -758,13 +758,13 @@ static inline void bdev_clear_flag(struct block_device *bdev, int flag)
 
 static inline int get_disk_ro(struct gendisk *disk)
 {
-	return disk->part0->bd_read_only ||
+	return bdev_test_flag(disk->part0, BD_READ_ONLY) ||
 		test_bit(GD_READ_ONLY, &disk->state);
 }
 
 static inline int bdev_read_only(struct block_device *bdev)
 {
-	return bdev->bd_read_only || get_disk_ro(bdev->bd_disk);
+	return bdev_test_flag(bdev, BD_READ_ONLY) || get_disk_ro(bdev->bd_disk);
 }
 
 bool set_capacity_and_notify(struct gendisk *disk, sector_t size);
-- 
2.39.2