The patch titled
Subject: block: use i_size_write() in bd_set_size()
has been added to the -mm tree. Its filename is
block-use-i_size_write-in-bd_set_size.patch
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------------------------------------------------------
From: Guo Chao <yan@xxxxxxxxxxxxxxxxxx>
Subject: block: use i_size_write() in bd_set_size()
blkdev_ioctl(GETBLKSIZE) uses i_size_read() to read size of block device.
If we update block size directly, reader may see intermediate result in
some machines and configurations. Use i_size_write() instead.
Signed-off-by: Guo Chao <yan@xxxxxxxxxxxxxxxxxx>
Cc: Alexander Viro <viro@xxxxxxxxxxxxxxxxxx>
Cc: Guo Chao <yan@xxxxxxxxxxxxxxxxxx>
Cc: M. Hindess <hindessm@xxxxxxxxxx>
Cc: Nikanth Karthikesan <knikanth@xxxxxxx>
Cc: Jens Axboe <axboe@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
fs/block_dev.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff -puN fs/block_dev.c~block-use-i_size_write-in-bd_set_size fs/block_dev.c
--- a/fs/block_dev.c~block-use-i_size_write-in-bd_set_size
+++ a/fs/block_dev.c
@@ -1033,7 +1033,9 @@ void bd_set_size(struct block_device *bd
{
unsigned bsize = bdev_logical_block_size(bdev);
- bdev->bd_inode->i_size = size;
+ mutex_lock(&bdev->bd_inode->i_mutex);
+ i_size_write(bdev->bd_inode, size);
+ mutex_unlock(&bdev->bd_inode->i_mutex);
while (bsize < PAGE_CACHE_SIZE) {
if (size & bsize)
break;
_
Patches currently in -mm which might be from yan@xxxxxxxxxxxxxxxxxx are
linux-next.patch
block-use-i_size_write-in-bd_set_size.patch
block-remove-redundant-check-to-bd_openers.patch
loopdev-fix-a-deadlock.patch
loopdev-update-block-device-size-in-loop_set_status.patch
loopdev-move-common-code-into-loop_figure_size.patch
loopdev-remove-an-user-triggerable-oops.patch
loopdev-ignore-negative-offset-when-calculate-loop-device-size.patch
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