commit 9d8bd6fcf0ebfccf39e6ac44df3c41155481030e
Merge: c0007c4f36a7 61cd83d3ade6
Author: Jens Axboe <axboe@kernel.dk>
Date:   Mon Jan 27 12:50:20 2020 -0700

    Merge branch 'for-5.6/io_uring-vfs' into ll
    
    * for-5.6/io_uring-vfs: (58 commits)
      io_uring: fix refcounting with batched allocations at OOM
      io_uring: add comment for drain_next
      io_uring: don't attempt to copy iovec for READ/WRITE
      io_uring: add support for sharing kernel io-wq workqueue
      io-wq: allow lookup of existing io_wq with given id
      io-wq: add 'id' to io_wq
      io-wq: make the io_wq ref counted
      io_uring: honor IOSQE_ASYNC for linked reqs
      io_uring: prep req when do IOSQE_ASYNC
      io_uring: use labeled array init in io_op_defs
      io_uring: optimise sqe-to-req flags translation
      io_uring: remove REQ_F_IO_DRAINED
      io_uring: file switch work needs to get flushed on exit
      io_uring: hide uring_fd in ctx
      io_uring: remove extra check in __io_commit_cqring
      io_uring: optimise use of ctx->drain_next
      io_uring: add support for probing opcodes
      io_uring: account fixed file references correctly in batch
      io_uring: add opcode to issue trace event
      io_uring: add support for IORING_OP_OPENAT2
      ...
    
    Signed-off-by: Jens Axboe <axboe@kernel.dk>

diff --cc fs/io_uring.c
index e54556b0fcc6,65fe16a795c1..eeaafbd74259
--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@@ -5157,7 -6312,12 +6308,6 @@@ SYSCALL_DEFINE6(io_uring_enter, unsigne
  	} else if (to_submit) {
  		struct mm_struct *cur_mm;
  
- 		to_submit = min(to_submit, ctx->sq_entries);
 -		if (current->mm != ctx->sqo_mm ||
 -		    current_cred() != ctx->creds) {
 -			ret = -EPERM;
 -			goto out;
 -		}
 -
  		mutex_lock(&ctx->uring_lock);
  		/* already have mm, so io_submit_sqes() won't try to grab it */
  		cur_mm = ctx->sqo_mm;