[PATCH v3 3/5] splice: Use init_sync_kiocb() in filemap_splice_read()

From: David Howells
Date: Tue Feb 14 2023 - 03:39:15 EST


Use init_sync_kiocb() in filemap_splice_read() rather than open coding it.

Requested-by: Christoph Hellwig <hch@xxxxxx>
Signed-off-by: David Howells <dhowells@xxxxxxxxxx>
cc: Christoph Hellwig <hch@xxxxxx>
cc: Jens Axboe <axboe@xxxxxxxxx>
cc: Al Viro <viro@xxxxxxxxxxxxxxxxxx>
cc: John Hubbard <jhubbard@xxxxxxxxxx>
cc: David Hildenbrand <david@xxxxxxxxxx>
cc: Matthew Wilcox <willy@xxxxxxxxxxxxx>
cc: linux-block@xxxxxxxxxxxxxxx
cc: linux-fsdevel@xxxxxxxxxxxxxxx
cc: linux-mm@xxxxxxxxx
---

Notes:
ver #2)
- Don't attempt to filter IOCB_* flags.

fs/splice.c | 7 +++----
1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/fs/splice.c b/fs/splice.c
index 7c0ff187f87a..4ea63d6a9040 100644
--- a/fs/splice.c
+++ b/fs/splice.c
@@ -419,15 +419,14 @@ static ssize_t filemap_splice_read(struct file *in, loff_t *ppos,
size_t len, unsigned int flags)
{
struct folio_batch fbatch;
+ struct kiocb iocb;
size_t total_spliced = 0, used, npages;
loff_t isize, end_offset;
bool writably_mapped;
int i, error = 0;

- struct kiocb iocb = {
- .ki_filp = in,
- .ki_pos = *ppos,
- };
+ init_sync_kiocb(&iocb, in);
+ iocb.ki_pos = *ppos;

/* Work out how much data we can actually add into the pipe */
used = pipe_occupancy(pipe->head, pipe->tail);