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filemap: remove pos variables in generic_file_read_iter 

Just use ki_pos directly to make everyones life easier.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
hifive-unleashed-5.1
Christoph Hellwig 2016-04-07 08:51:55 -07:00 committed by Al Viro
parent bf16200689
commit c64fb5c744
1 changed files with 7 additions and 8 deletions
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15
mm/filemap.c
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@ -1838,8 +1838,6 @@ generic_file_read_iter(struct kiocb *iocb, struct iov_iter *iter)
{
struct file *file = iocb->ki_filp;
ssize_t retval = 0;
loff_t *ppos = &iocb->ki_pos;
loff_t pos = *ppos;
size_t count = iov_iter_count(iter);
if (!count)
@ -1851,15 +1849,16 @@ generic_file_read_iter(struct kiocb *iocb, struct iov_iter *iter)
loff_t size;
size = i_size_read(inode);
retval = filemap_write_and_wait_range(mapping, pos,
pos + count - 1);
retval = filemap_write_and_wait_range(mapping, iocb->ki_pos,
iocb->ki_pos + count - 1);
if (!retval) {
struct iov_iter data = *iter;
retval = mapping->a_ops->direct_IO(iocb, &data, pos);
retval = mapping->a_ops->direct_IO(iocb, &data,
iocb->ki_pos);
}
if (retval > 0) {
*ppos = pos + retval;
iocb->ki_pos += retval;
iov_iter_advance(iter, retval);
}
@ -1872,14 +1871,14 @@ generic_file_read_iter(struct kiocb *iocb, struct iov_iter *iter)
* the rest of the read. Buffered reads will not work for
* DAX files, so don't bother trying.
*/
if (retval < 0 || !iov_iter_count(iter) || *ppos >= size ||
if (retval < 0 || !iov_iter_count(iter) || iocb->ki_pos >= size ||
IS_DAX(inode)) {
file_accessed(file);
goto out;
}
}
retval = do_generic_file_read(file, ppos, iter, retval);
retval = do_generic_file_read(file, &iocb->ki_pos, iter, retval);
out:
return retval;
}