[PATCH v4 13/47] open: convert do_sys_openat2() to FD_PREPARE()

[Christian Brauner <brauner@kernel.org>]

Signed-off-by: Christian Brauner <brauner@kernel.org>
---
 fs/open.c | 17 +++--------------
 1 file changed, 3 insertions(+), 14 deletions(-)

diff --git a/fs/open.c b/fs/open.c
index 3d64372ecc67..fa00860f4e4c 100644
--- a/fs/open.c
+++ b/fs/open.c
@@ -1421,8 +1421,8 @@ static int do_sys_openat2(int dfd, const char __user *filename,
 			  struct open_how *how)
 {
 	struct open_flags op;
-	struct filename *tmp;
-	int err, fd;
+	struct filename *tmp __free(putname);
+	int err;
 
 	err = build_open_flags(how, &op);
 	if (unlikely(err))
@@ -1432,18 +1432,7 @@ static int do_sys_openat2(int dfd, const char __user *filename,
 	if (IS_ERR(tmp))
 		return PTR_ERR(tmp);
 
-	fd = get_unused_fd_flags(how->flags);
-	if (likely(fd >= 0)) {
-		struct file *f = do_filp_open(dfd, tmp, &op);
-		if (IS_ERR(f)) {
-			put_unused_fd(fd);
-			fd = PTR_ERR(f);
-		} else {
-			fd_install(fd, f);
-		}
-	}
-	putname(tmp);
-	return fd;
+	return FD_ADD(how->flags, do_filp_open(dfd, tmp, &op));
 }
 
 int do_sys_open(int dfd, const char __user *filename, int flags, umode_t mode)

-- 
2.47.3