linux-kernel - [ammarfaizi2-block:axboe/linux-block/for-5.20/io_uring-buffered-writes 118/137] io_uring/io_uring.c:1038: warning: expecting prototype for io_llist_xchg(). Prototype was for io_llist

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Message-ID: <202206230848.OkDjWWbp-lkp@intel.com>
Date:   Thu, 23 Jun 2022 08:46:34 +0800
From:   kernel test robot <lkp@...el.com>
To:     Dylan Yudaken <dylany@...com>
Cc:     kbuild-all@...ts.01.org,
        GNU/Weeb Mailing List <gwml@...r.gnuweeb.org>,
        linux-kernel@...r.kernel.org, Jens Axboe <axboe@...nel.dk>
Subject: [ammarfaizi2-block:axboe/linux-block/for-5.20/io_uring-buffered-writes
 118/137] io_uring/io_uring.c:1038: warning: expecting prototype for
 io_llist_xchg(). Prototype was for io_llist_cmpxchg() instead

tree:   https://github.com/ammarfaizi2/linux-block axboe/linux-block/for-5.20/io_uring-buffered-writes
head:   e9cfc64a27f7a581b8c5d14da4efccfeae9c63bd
commit: c0808632a83a7c607a987154372e705353acf4f2 [118/137] io_uring: introduce llist helpers
config: um-i386_defconfig (https://download.01.org/0day-ci/archive/20220623/202206230848.OkDjWWbp-lkp@intel.com/config)
compiler: gcc-11 (Debian 11.3.0-3) 11.3.0
reproduce (this is a W=1 build):
        # https://github.com/ammarfaizi2/linux-block/commit/c0808632a83a7c607a987154372e705353acf4f2
        git remote add ammarfaizi2-block https://github.com/ammarfaizi2/linux-block
        git fetch --no-tags ammarfaizi2-block axboe/linux-block/for-5.20/io_uring-buffered-writes
        git checkout c0808632a83a7c607a987154372e705353acf4f2
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        make W=1 O=build_dir ARCH=um SUBARCH=i386 SHELL=/bin/bash

If you fix the issue, kindly add following tag where applicable
Reported-by: kernel test robot <lkp@...el.com>

All warnings (new ones prefixed by >>):

   io_uring/io_uring.c:1022: warning: Function parameter or member 'node' not described in 'io_llist_xchg'
   io_uring/io_uring.c:1022: warning: Excess function parameter 'new' description in 'io_llist_xchg'
>> io_uring/io_uring.c:1038: warning: expecting prototype for io_llist_xchg(). Prototype was for io_llist_cmpxchg() instead


vim +1038 io_uring/io_uring.c

  1025	
  1026	/**
  1027	 * io_llist_xchg - possibly swap all entries in a lock-less list
  1028	 * @head:	the head of lock-less list to delete all entries
  1029	 * @old:	expected old value of the first entry of the list
  1030	 * @new:	new entry as the head of the list
  1031	 *
  1032	 * perform a cmpxchg on the first entry of the list.
  1033	 */
  1034	
  1035	static inline struct llist_node *io_llist_cmpxchg(struct llist_head *head,
  1036							  struct llist_node *old,
  1037							  struct llist_node *new)
> 1038	{
  1039		return cmpxchg(&head->first, old, new);
  1040	}
  1041	

-- 
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https://01.org/lkp