linux-kernel - drivers/platform/chrome/wilco_ec/event.c:99: warning: Excess struct member 'entries' description in 'ec_event

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Message-ID: <202312150101.lovwMZzT-lkp@intel.com>
Date:   Fri, 15 Dec 2023 01:23:58 +0800
From:   kernel test robot <lkp@...el.com>
To:     Kees Cook <keescook@...omium.org>
Cc:     llvm@...ts.linux.dev, oe-kbuild-all@...ts.linux.dev,
        linux-kernel@...r.kernel.org, Tzung-Bi Shih <tzungbi@...nel.org>,
        "Gustavo A. R. Silva" <gustavoars@...nel.org>
Subject: drivers/platform/chrome/wilco_ec/event.c:99: warning: Excess struct
 member 'entries' description in 'ec_event_queue'

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   5bd7ef53ffe5ca580e93e74eb8c81ed191ddc4bd
commit: 1aa8df90f4569acd36d2c94a9cfe1eee561575d6 platform/chrome: wilco_ec: Annotate struct ec_event_queue with __counted_by
date:   3 months ago
config: i386-allmodconfig (https://download.01.org/0day-ci/archive/20231215/202312150101.lovwMZzT-lkp@intel.com/config)
compiler: clang version 16.0.4 (https://github.com/llvm/llvm-project.git ae42196bc493ffe877a7e3dff8be32035dea4d07)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20231215/202312150101.lovwMZzT-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@...el.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202312150101.lovwMZzT-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> drivers/platform/chrome/wilco_ec/event.c:99: warning: Excess struct member 'entries' description in 'ec_event_queue'


vim +99 drivers/platform/chrome/wilco_ec/event.c

1d333ef3d59902 Nick Crews 2019-06-24   86  
1d333ef3d59902 Nick Crews 2019-06-24   87  /**
1d333ef3d59902 Nick Crews 2019-06-24   88   * struct ec_event_queue - Circular queue for events.
1d333ef3d59902 Nick Crews 2019-06-24   89   * @capacity: Number of elements the queue can hold.
1d333ef3d59902 Nick Crews 2019-06-24   90   * @head: Next index to write to.
1d333ef3d59902 Nick Crews 2019-06-24   91   * @tail: Next index to read from.
1d333ef3d59902 Nick Crews 2019-06-24   92   * @entries: Array of events.
1d333ef3d59902 Nick Crews 2019-06-24   93   */
1d333ef3d59902 Nick Crews 2019-06-24   94  struct ec_event_queue {
1d333ef3d59902 Nick Crews 2019-06-24   95  	int capacity;
1d333ef3d59902 Nick Crews 2019-06-24   96  	int head;
1d333ef3d59902 Nick Crews 2019-06-24   97  	int tail;
1aa8df90f4569a Kees Cook  2023-09-22   98  	struct ec_event *entries[] __counted_by(capacity);
1d333ef3d59902 Nick Crews 2019-06-24  @99  };
1d333ef3d59902 Nick Crews 2019-06-24  100  

:::::: The code at line 99 was first introduced by commit
:::::: 1d333ef3d599026897fb11b4f89f9f8f30838139 platform/chrome: wilco_ec: Add circular buffer as event queue

:::::: TO: Nick Crews <ncrews@...omium.org>
:::::: CC: Enric Balletbo i Serra <enric.balletbo@...labora.com>

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