Merge tag 'io_uring-6.13-20242901' of git://git.kernel.dk/linux

Pull more io_uring updates from Jens Axboe:

 - Remove a leftover struct from when the cqwait registered waiting was
   transitioned to regions.

 - Fix for an issue introduced in this merge window, where nop->fd might
   be used uninitialized. Ensure it's always set.

 - Add capping of the task_work run in local task_work mode, to prevent
   bursty and long chains from adding too much latency.

 - Work around xa_store() leaving ->head non-NULL if it encounters an
   allocation error during storing. Just a debug trigger, and can go
   away once xa_store() behaves in a more expected way for this
   condition. Not a major thing as it basically requires fault injection
   to trigger it.

 - Fix a few mapping corner cases

 - Fix KCSAN complaint on reading the table size post unlock. Again not
   a "real" issue, but it's easy to silence by just keeping the reading
   inside the lock that protects it.

* tag 'io_uring-6.13-20242901' of git://git.kernel.dk/linux:
  io_uring/tctx: work around xa_store() allocation error issue
  io_uring: fix corner case forgetting to vunmap
  io_uring: fix task_work cap overshooting
  io_uring: check for overflows in io_pin_pages
  io_uring/nop: ensure nop->fd is always initialized
  io_uring: limit local tw done
  io_uring: add io_local_work_pending()
  io_uring/region: return negative -E2BIG in io_create_region()
  io_uring: protect register tracing
  io_uring: remove io_uring_cqwait_reg_arg

2 files changed, 1 insertions, 14 deletions

diff --git a/include/linux/io_uring_types.h b/include/linux/io_uring_types.h
index 593c10a02144..011860ade268 100644
--- a/include/linux/io_uring_types.h
+++ b/include/linux/io_uring_types.h
@@ -336,6 +336,7 @@ struct io_ring_ctx {
 	 */
 	struct {
 		struct llist_head	work_llist;
+		struct llist_head	retry_llist;
 		unsigned long		check_cq;
 		atomic_t		cq_wait_nr;
 		atomic_t		cq_timeouts;
diff --git a/include/uapi/linux/io_uring.h b/include/uapi/linux/io_uring.h
index 4418d0192959..aac9a4f8fa9a 100644
--- a/include/uapi/linux/io_uring.h
+++ b/include/uapi/linux/io_uring.h
@@ -874,20 +874,6 @@ enum {
 };
 
 /*
- * Argument for IORING_REGISTER_CQWAIT_REG, registering a region of
- * struct io_uring_reg_wait that can be indexed when io_uring_enter(2) is
- * called rather than pass in a wait argument structure separately.
- */
-struct io_uring_cqwait_reg_arg {
-	__u32		flags;
-	__u32		struct_size;
-	__u32		nr_entries;
-	__u32		pad;
-	__u64		user_addr;
-	__u64		pad2[3];
-};
-
-/*
  * Argument for io_uring_enter(2) with
  * IORING_GETEVENTS | IORING_ENTER_EXT_ARG_REG set, where the actual argument
  * is an index into a previously registered fixed wait region described by