[PATCH 15/16] io_uring: improve hardlink code generation

[Pavel Begunkov <asml.silence@gmail.com>]

req_set_fail_links() condition checking is bulky. Even though it's
always in a slow path, it's inlined and generates lots of extra code,
simplify it be moving HARDLINK checking into helpers killing linked
requests.

          text    data     bss     dec     hex filename
before:  79318   12330       8   91656   16608 ./fs/io_uring.o
after:   79126   12330       8   91464   16548 ./fs/io_uring.o

Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
---
 fs/io_uring.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/fs/io_uring.c b/fs/io_uring.c
index 4e6a6f6df6a2..2a465b6e90a4 100644
--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -1103,7 +1103,7 @@ static bool io_match_task(struct io_kiocb *head,
 
 static inline void req_set_fail_links(struct io_kiocb *req)
 {
-	if ((req->flags & (REQ_F_LINK | REQ_F_HARDLINK)) == REQ_F_LINK)
+	if (req->flags & REQ_F_LINK)
 		req->flags |= REQ_F_FAIL_LINK;
 }
 
@@ -1812,7 +1812,8 @@ static bool io_disarm_next(struct io_kiocb *req)
 
 	if (likely(req->flags & REQ_F_LINK_TIMEOUT))
 		posted = io_kill_linked_timeout(req);
-	if (unlikely(req->flags & REQ_F_FAIL_LINK)) {
+	if (unlikely((req->flags & REQ_F_FAIL_LINK) &&
+		     !(req->flags & REQ_F_HARDLINK))) {
 		posted |= (req->link != NULL);
 		io_fail_links(req);
 	}
-- 
2.24.0