[axboe-block:io_uring-5.18 3/5] fs/io_uring.c:5856:68: sparse: sparse: incorrect type in initializer (different base types)

[kernel test robot]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux-block.git io_uring-5.18
head:   0f8da75b51ac863b9435368bd50691718cc454b0
commit: 2804ecd8d3e3730b4f999cc1ff4b2441e1f4d513 [3/5] io_uring: move apoll->events cache
config: i386-randconfig-s002-20220411 (https://download.01.org/0day-ci/archive/20220413/202204130208.UaBahHZc-lkp@xxxxxxxxx/config)
compiler: gcc-11 (Debian 11.2.0-19) 11.2.0
reproduce:
        # apt-get install sparse
        # sparse version: v0.6.4-dirty
        # https://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux-block.git/commit/?id=2804ecd8d3e3730b4f999cc1ff4b2441e1f4d513
        git remote add axboe-block https://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux-block.git
        git fetch --no-tags axboe-block io_uring-5.18
        git checkout 2804ecd8d3e3730b4f999cc1ff4b2441e1f4d513
        # save the config file to linux build tree
        mkdir build_dir
        make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=i386 SHELL=/bin/bash

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@xxxxxxxxx>


sparse warnings: (new ones prefixed by >>)
   fs/io_uring.c: note: in included file (through include/trace/trace_events.h, include/trace/define_trace.h, include/trace/events/io_uring.h):
   include/trace/events/io_uring.h:488:1: sparse: sparse: incorrect type in assignment (different base types) @@     expected unsigned int [usertype] op_flags @@     got restricted __kernel_rwf_t const [usertype] rw_flags @@
   include/trace/events/io_uring.h:488:1: sparse:     expected unsigned int [usertype] op_flags
   include/trace/events/io_uring.h:488:1: sparse:     got restricted __kernel_rwf_t const [usertype] rw_flags
   fs/io_uring.c: note: in included file (through include/trace/perf.h, include/trace/define_trace.h, include/trace/events/io_uring.h):
   include/trace/events/io_uring.h:488:1: sparse: sparse: incorrect type in assignment (different base types) @@     expected unsigned int [usertype] op_flags @@     got restricted __kernel_rwf_t const [usertype] rw_flags @@
   include/trace/events/io_uring.h:488:1: sparse:     expected unsigned int [usertype] op_flags
   include/trace/events/io_uring.h:488:1: sparse:     got restricted __kernel_rwf_t const [usertype] rw_flags
   fs/io_uring.c:3161:23: sparse: sparse: incorrect type in assignment (different base types) @@     expected unsigned int [usertype] flags @@     got restricted __kernel_rwf_t @@
   fs/io_uring.c:3161:23: sparse:     expected unsigned int [usertype] flags
   fs/io_uring.c:3161:23: sparse:     got restricted __kernel_rwf_t
   fs/io_uring.c:3379:24: sparse: sparse: incorrect type in return expression (different address spaces) @@     expected void [noderef] __user * @@     got struct io_buffer *[assigned] kbuf @@
   fs/io_uring.c:3379:24: sparse:     expected void [noderef] __user *
   fs/io_uring.c:3379:24: sparse:     got struct io_buffer *[assigned] kbuf
   fs/io_uring.c:3766:48: sparse: sparse: incorrect type in argument 2 (different base types) @@     expected restricted __kernel_rwf_t [usertype] flags @@     got unsigned int [usertype] flags @@
   fs/io_uring.c:3766:48: sparse:     expected restricted __kernel_rwf_t [usertype] flags
   fs/io_uring.c:3766:48: sparse:     got unsigned int [usertype] flags
   fs/io_uring.c:5091:14: sparse: sparse: incorrect type in assignment (different address spaces) @@     expected struct file *file @@     got struct file [noderef] __rcu * @@
   fs/io_uring.c:5091:14: sparse:     expected struct file *file
   fs/io_uring.c:5091:14: sparse:     got struct file [noderef] __rcu *
>> fs/io_uring.c:5856:68: sparse: sparse: incorrect type in initializer (different base types) @@     expected restricted __poll_t [usertype] _key @@     got int apoll_events @@
   fs/io_uring.c:5856:68: sparse:     expected restricted __poll_t [usertype] _key
   fs/io_uring.c:5856:68: sparse:     got int apoll_events
   fs/io_uring.c:5861:55: sparse: sparse: restricted __poll_t degrades to integer
   fs/io_uring.c:5865:58: sparse: sparse: restricted __poll_t degrades to integer
   fs/io_uring.c:5866:65: sparse: sparse: incorrect type in argument 1 (different base types) @@     expected restricted __poll_t [usertype] val @@     got unsigned int @@
   fs/io_uring.c:5866:65: sparse:     expected restricted __poll_t [usertype] val
   fs/io_uring.c:5866:65: sparse:     got unsigned int
   fs/io_uring.c:5866:52: sparse: sparse: incorrect type in initializer (different base types) @@     expected restricted __poll_t [usertype] mask @@     got unsigned short @@
   fs/io_uring.c:5866:52: sparse:     expected restricted __poll_t [usertype] mask
   fs/io_uring.c:5866:52: sparse:     got unsigned short
   fs/io_uring.c:5870:71: sparse: sparse: incorrect type in argument 3 (different base types) @@     expected signed int [usertype] res @@     got restricted __poll_t [usertype] mask @@
   fs/io_uring.c:5870:71: sparse:     expected signed int [usertype] res
   fs/io_uring.c:5870:71: sparse:     got restricted __poll_t [usertype] mask
   fs/io_uring.c:5900:66: sparse: sparse: restricted __poll_t degrades to integer
   fs/io_uring.c:5900:55: sparse: sparse: incorrect type in argument 1 (different base types) @@     expected restricted __poll_t [usertype] val @@     got unsigned int @@
   fs/io_uring.c:5900:55: sparse:     expected restricted __poll_t [usertype] val
   fs/io_uring.c:5900:55: sparse:     got unsigned int
   fs/io_uring.c:5981:45: sparse: sparse: incorrect type in argument 3 (different base types) @@     expected int events @@     got restricted __poll_t [usertype] events @@
   fs/io_uring.c:5981:45: sparse:     expected int events
   fs/io_uring.c:5981:45: sparse:     got restricted __poll_t [usertype] events
   fs/io_uring.c:6016:40: sparse: sparse: incorrect type in argument 2 (different base types) @@     expected int mask @@     got restricted __poll_t [usertype] mask @@
   fs/io_uring.c:6016:40: sparse:     expected int mask
   fs/io_uring.c:6016:40: sparse:     got restricted __poll_t [usertype] mask
   fs/io_uring.c:6016:50: sparse: sparse: incorrect type in argument 3 (different base types) @@     expected int events @@     got restricted __poll_t [usertype] events @@
   fs/io_uring.c:6016:50: sparse:     expected int events
   fs/io_uring.c:6016:50: sparse:     got restricted __poll_t [usertype] events
   fs/io_uring.c:6107:24: sparse: sparse: incorrect type in return expression (different base types) @@     expected int @@     got restricted __poll_t [assigned] [usertype] mask @@
   fs/io_uring.c:6107:24: sparse:     expected int
   fs/io_uring.c:6107:24: sparse:     got restricted __poll_t [assigned] [usertype] mask
   fs/io_uring.c:6124:40: sparse: sparse: incorrect type in argument 2 (different base types) @@     expected int mask @@     got restricted __poll_t [assigned] [usertype] mask @@
   fs/io_uring.c:6124:40: sparse:     expected int mask
   fs/io_uring.c:6124:40: sparse:     got restricted __poll_t [assigned] [usertype] mask
   fs/io_uring.c:6124:50: sparse: sparse: incorrect type in argument 3 (different base types) @@     expected int events @@     got restricted __poll_t [usertype] events @@
   fs/io_uring.c:6124:50: sparse:     expected int events
   fs/io_uring.c:6124:50: sparse:     got restricted __poll_t [usertype] events
   fs/io_uring.c:6134:47: sparse: sparse: incorrect type in argument 3 (different base types) @@     expected int events @@     got restricted __poll_t [usertype] events @@
   fs/io_uring.c:6134:47: sparse:     expected int events
   fs/io_uring.c:6134:47: sparse:     got restricted __poll_t [usertype] events
   fs/io_uring.c:6159:25: sparse: sparse: restricted __poll_t degrades to integer
   fs/io_uring.c:6159:48: sparse: sparse: incorrect type in initializer (different base types) @@     expected restricted __poll_t [usertype] mask @@     got unsigned int @@
   fs/io_uring.c:6159:48: sparse:     expected restricted __poll_t [usertype] mask
   fs/io_uring.c:6159:48: sparse:     got unsigned int
   fs/io_uring.c:6168:22: sparse: sparse: invalid assignment: |=
   fs/io_uring.c:6168:22: sparse:    left side has type restricted __poll_t
   fs/io_uring.c:6168:22: sparse:    right side has type int
   fs/io_uring.c:6173:30: sparse: sparse: invalid assignment: &=
   fs/io_uring.c:6173:30: sparse:    left side has type restricted __poll_t
   fs/io_uring.c:6173:30: sparse:    right side has type int
   fs/io_uring.c:6175:22: sparse: sparse: invalid assignment: |=
   fs/io_uring.c:6175:22: sparse:    left side has type restricted __poll_t
   fs/io_uring.c:6175:22: sparse:    right side has type int
   fs/io_uring.c:6201:33: sparse: sparse: incorrect type in argument 5 (different base types) @@     expected int mask @@     got restricted __poll_t [assigned] [usertype] mask @@
   fs/io_uring.c:6201:33: sparse:     expected int mask
   fs/io_uring.c:6201:33: sparse:     got restricted __poll_t [assigned] [usertype] mask
   fs/io_uring.c:6201:50: sparse: sparse: incorrect type in argument 6 (different base types) @@     expected int events @@     got restricted __poll_t [usertype] events @@
   fs/io_uring.c:6201:50: sparse:     expected int events
   fs/io_uring.c:6201:50: sparse:     got restricted __poll_t [usertype] events
   fs/io_uring.c:6283:24: sparse: sparse: invalid assignment: |=
   fs/io_uring.c:6283:24: sparse:    left side has type unsigned int
   fs/io_uring.c:6283:24: sparse:    right side has type restricted __poll_t
   fs/io_uring.c:6284:65: sparse: sparse: restricted __poll_t degrades to integer
   fs/io_uring.c:6284:29: sparse: sparse: restricted __poll_t degrades to integer
   fs/io_uring.c:6284:38: sparse: sparse: incorrect type in return expression (different base types) @@     expected restricted __poll_t @@     got unsigned int @@
   fs/io_uring.c:6284:38: sparse:     expected restricted __poll_t
   fs/io_uring.c:6284:38: sparse:     got unsigned int
>> fs/io_uring.c:6336:27: sparse: sparse: incorrect type in assignment (different base types) @@     expected int apoll_events @@     got restricted __poll_t [usertype] events @@
   fs/io_uring.c:6336:27: sparse:     expected int apoll_events
   fs/io_uring.c:6336:27: sparse:     got restricted __poll_t [usertype] events
   fs/io_uring.c:6374:43: sparse: sparse: invalid assignment: &=
   fs/io_uring.c:6374:43: sparse:    left side has type restricted __poll_t
   fs/io_uring.c:6374:43: sparse:    right side has type int
   fs/io_uring.c:6375:62: sparse: sparse: restricted __poll_t degrades to integer
   fs/io_uring.c:6375:43: sparse: sparse: invalid assignment: |=
   fs/io_uring.c:6375:43: sparse:    left side has type restricted __poll_t
   fs/io_uring.c:6375:43: sparse:    right side has type unsigned int
   fs/io_uring.c:2412:17: sparse: sparse: context imbalance in 'handle_prev_tw_list' - different lock contexts for basic block
   fs/io_uring.c:7382:39: sparse: sparse: marked inline, but without a definition
   fs/io_uring.c:7382:39: sparse: sparse: marked inline, but without a definition
   fs/io_uring.c:7382:39: sparse: sparse: marked inline, but without a definition

vim +5856 fs/io_uring.c

  5828	
  5829	/*
  5830	 * All poll tw should go through this. Checks for poll events, manages
  5831	 * references, does rewait, etc.
  5832	 *
  5833	 * Returns a negative error on failure. >0 when no action require, which is
  5834	 * either spurious wakeup or multishot CQE is served. 0 when it's done with
  5835	 * the request, then the mask is stored in req->result.
  5836	 */
  5837	static int io_poll_check_events(struct io_kiocb *req, bool locked)
  5838	{
  5839		struct io_ring_ctx *ctx = req->ctx;
  5840		int v;
  5841	
  5842		/* req->task == current here, checking PF_EXITING is safe */
  5843		if (unlikely(req->task->flags & PF_EXITING))
  5844			io_poll_mark_cancelled(req);
  5845	
  5846		do {
  5847			v = atomic_read(&req->poll_refs);
  5848	
  5849			/* tw handler should be the owner, and so have some references */
  5850			if (WARN_ON_ONCE(!(v & IO_POLL_REF_MASK)))
  5851				return 0;
  5852			if (v & IO_POLL_CANCEL_FLAG)
  5853				return -ECANCELED;
  5854	
  5855			if (!req->result) {
> 5856				struct poll_table_struct pt = { ._key = req->apoll_events };
  5857	
  5858				if (unlikely(!io_assign_file(req, IO_URING_F_UNLOCKED)))
  5859					req->result = -EBADF;
  5860				else
  5861					req->result = vfs_poll(req->file, &pt) & req->apoll_events;
  5862			}
  5863	
  5864			/* multishot, just fill an CQE and proceed */
  5865			if (req->result && !(req->apoll_events & EPOLLONESHOT)) {
  5866				__poll_t mask = mangle_poll(req->result & req->apoll_events);
  5867				bool filled;
  5868	
  5869				spin_lock(&ctx->completion_lock);
  5870				filled = io_fill_cqe_aux(ctx, req->user_data, mask,
  5871							 IORING_CQE_F_MORE);
  5872				io_commit_cqring(ctx);
  5873				spin_unlock(&ctx->completion_lock);
  5874				if (unlikely(!filled))
  5875					return -ECANCELED;
  5876				io_cqring_ev_posted(ctx);
  5877			} else if (req->result) {
  5878				return 0;
  5879			}
  5880	
  5881			/*
  5882			 * Release all references, retry if someone tried to restart
  5883			 * task_work while we were executing it.
  5884			 */
  5885		} while (atomic_sub_return(v & IO_POLL_REF_MASK, &req->poll_refs));
  5886	
  5887		return 1;
  5888	}
  5889	

-- 
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