[PATCH V2 1/2] block: Set inode of block_device size to zero when delete gendisk.

[majianpeng]

When remove gendisk, set the size of inode of block_device to zero.
This is mainly let the vfs know disk removed.

Signed-off-by: Jianpeng Ma <majianp...@gmail.com>
---
 block/genhd.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/block/genhd.c b/block/genhd.c
index dadf42b..9a4c245 100644
--- a/block/genhd.c
+++ b/block/genhd.c
@@ -1369,6 +1369,12 @@ int invalidate_partition(struct gendisk *disk, int 
partno)
        if (bdev) {
                fsync_bdev(bdev);
                res = __invalidate_device(bdev, true);
+               /*
+                * When used buffer-mode on raw blockdevice,the disk removed.
+                * But the vfs don't know.So tell the vfs size of disk
+                * became zero, the buffer write can return
+                */
+               i_size_write(bdev->bd_inode, 0);
                bdput(bdev);
        }
        return res;
-- 
1.8.4-rc0
N‹§²æìr¸›yúèšØb²X¬¶Ç§vØ^–)Þº{.nÇ+‰·¥Š{±‘êçzX§¶›¡Ü¨}©ž²Æ 
zÚ&j:+v‰¨¾«‘êçzZ+€Ê+zf£¢·hšˆ§~†­†Ûiÿûàz¹®w¥¢¸?™¨è­Ú&¢)ߢf”ù^jÇ«y§m…á@A«a¶Úÿ
0¶ìh®å’i