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block_dev: switch to fixed_size_llseek()

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Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2013-06-23 21:34:45 +04:00
parent d2c40f789f
commit 5d48f3a2de
1 changed files with 1 additions and 22 deletions
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23
fs/block_dev.c
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@ -325,31 +325,10 @@ static int blkdev_write_end(struct file *file, struct address_space *mapping,
static loff_t block_llseek(struct file *file, loff_t offset, int whence)
{
struct inode *bd_inode = file->f_mapping->host;
loff_t size;
loff_t retval;
mutex_lock(&bd_inode->i_mutex);
size = i_size_read(bd_inode);
retval = -EINVAL;
switch (whence) {
case SEEK_END:
offset += size;
break;
case SEEK_CUR:
offset += file->f_pos;
case SEEK_SET:
break;
default:
goto out;
}
if (offset >= 0 && offset <= size) {
if (offset != file->f_pos) {
file->f_pos = offset;
}
retval = offset;
}
out:
retval = fixed_size_llseek(file, offset, whence, i_size_read(bd_inode));
mutex_unlock(&bd_inode->i_mutex);
return retval;
}