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fs: pass iocb to do_generic_file_read

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And rename it to the more descriptive generic_file_buffered_read while
at it.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Christoph Hellwig 2017-08-29 16:13:18 +02:00 committed by Al Viro
parent cc4a41fe55
commit 47c27bc469
1 changed files with 8 additions and 7 deletions
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15
mm/filemap.c
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@ -1888,9 +1888,8 @@ static void shrink_readahead_size_eio(struct file *filp,
}
/**
* do_generic_file_read - generic file read routine
* @filp: the file to read
* @ppos: current file position
* generic_file_buffered_read - generic file read routine
* @iocb: the iocb to read
* @iter: data destination
* @written: already copied
*
@ -1900,12 +1899,14 @@ static void shrink_readahead_size_eio(struct file *filp,
* This is really ugly. But the goto's actually try to clarify some
* of the logic when it comes to error handling etc.
*/
static ssize_t do_generic_file_read(struct file *filp, loff_t *ppos,
static ssize_t generic_file_buffered_read(struct kiocb *iocb,
struct iov_iter *iter, ssize_t written)
{
struct file *filp = iocb->ki_filp;
struct address_space *mapping = filp->f_mapping;
struct inode *inode = mapping->host;
struct file_ra_state *ra = &filp->f_ra;
loff_t *ppos = &iocb->ki_pos;
pgoff_t index;
pgoff_t last_index;
pgoff_t prev_index;
@ -2153,14 +2154,14 @@ out:
ssize_t
generic_file_read_iter(struct kiocb *iocb, struct iov_iter *iter)
{
struct file *file = iocb->ki_filp;
ssize_t retval = 0;
size_t count = iov_iter_count(iter);
ssize_t retval = 0;
if (!count)
goto out; /* skip atime */
if (iocb->ki_flags & IOCB_DIRECT) {
struct file *file = iocb->ki_filp;
struct address_space *mapping = file->f_mapping;
struct inode *inode = mapping->host;
loff_t size;
@ -2201,7 +2202,7 @@ generic_file_read_iter(struct kiocb *iocb, struct iov_iter *iter)
goto out;
}
retval = do_generic_file_read(file, &iocb->ki_pos, iter, retval);
retval = generic_file_buffered_read(iocb, iter, retval);
out:
return retval;
}