[PATCH v4 1/8] io_uring: make del_task_file more forgiving

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

Rework io_uring_del_task_file(), so it accepts an index to delete, and
it's not necessarily have to be in the ->xa. Infer file from xa_erase()
to maintain a single origin of truth.

Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
---
 fs/io_uring.c | 13 ++++++++-----
 1 file changed, 8 insertions(+), 5 deletions(-)

diff --git a/fs/io_uring.c b/fs/io_uring.c
index 92c25b5f1349..4c6a92e5d5a3 100644
--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -8780,15 +8780,18 @@ static int io_uring_add_task_file(struct io_ring_ctx *ctx, struct file *file)
 /*
  * Remove this io_uring_file -> task mapping.
  */
-static void io_uring_del_task_file(struct file *file)
+static void io_uring_del_task_file(unsigned long index)
 {
 	struct io_uring_task *tctx = current->io_uring;
+	struct file *file;
+
+	file = xa_erase(&tctx->xa, index);
+	if (!file)
+		return;
 
 	if (tctx->last == file)
 		tctx->last = NULL;
-	file = xa_erase(&tctx->xa, (unsigned long)file);
-	if (file)
-		fput(file);
+	fput(file);
 }
 
 static void io_uring_clean_tctx(struct io_uring_task *tctx)
@@ -8797,7 +8800,7 @@ static void io_uring_clean_tctx(struct io_uring_task *tctx)
 	unsigned long index;
 
 	xa_for_each(&tctx->xa, index, file)
-		io_uring_del_task_file(file);
+		io_uring_del_task_file(index);
 	if (tctx->io_wq) {
 		io_wq_put_and_exit(tctx->io_wq);
 		tctx->io_wq = NULL;
-- 
2.24.0