buffer: Convert __bread_slow to bh_submit()

Avoid an extra indirect function call and changing the buffer refcount
by using bh_submit() instead of submit_bh().

Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Link: https://patch.msgid.link/20260528173150.1093780-7-willy@infradead.org
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Christian Brauner (Amutable) <brauner@kernel.org>

diff --git a/fs/buffer.c b/fs/buffer.c
index 6329f2b554daa814484d5e827edf8822a9a8adc4..f8428f802b68163fb3e0645a6705ccd7334949e5 100644 (file)
--- a/fs/buffer.c
+++ b/fs/buffer.c
@@ -1326,9 +1326,7 @@ static struct buffer_head *__bread_slow(struct buffer_head *bh)
                unlock_buffer(bh);
                return bh;
        } else {
-               get_bh(bh);
-               bh->b_end_io = end_buffer_read_sync;
-               submit_bh(REQ_OP_READ, bh);
+               bh_submit(bh, REQ_OP_READ, bh_end_read);
                wait_on_buffer(bh);
                if (buffer_uptodate(bh))
                        return bh;