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udf: atomically read inode size

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See i_size_read() comments in include/linux/fs.h

Signed-off-by: Fabian Frederick <fabf@skynet.be>
Signed-off-by: Jan Kara <jack@suse.cz>
This commit is contained in:
Fabian Frederick 2017-01-06 21:54:41 +01:00 • committed by Jan Kara
parent 54bb60d531
commit 23bcda112f
2 changed files with 5 additions and 4 deletions
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fs/udf/lowlevel.c
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@ -58,7 +58,7 @@ unsigned long udf_get_last_block(struct super_block *sb)
*/
if (ioctl_by_bdev(bdev, CDROM_LAST_WRITTEN, (unsigned long) &lblock) ||
lblock == 0)
lblock = bdev->bd_inode->i_size >> sb->s_blocksize_bits;
lblock = i_size_read(bdev->bd_inode) >> sb->s_blocksize_bits;
if (lblock)
return lblock - 1;