linux-kernel - [jlayton:ceph-fscrypt 55/57] net/ceph/messenger.c:1126:30: sparse: sparse: incompatible types in comparison expression (different type sizes):

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Date:   Fri, 11 Feb 2022 15:38:46 +0800
From:   kernel test robot <lkp@...el.com>
To:     Jeff Layton <jlayton@...nel.org>
Cc:     kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org
Subject: [jlayton:ceph-fscrypt 55/57] net/ceph/messenger.c:1126:30: sparse:
 sparse: incompatible types in comparison expression (different type sizes):

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/jlayton/linux.git ceph-fscrypt
head:   adf69efebc954db1aa7af7b93febbc2a1b51dc6c
commit: 8647843c1c4c4ebffb864d049176b4d847ef3a4b [55/57] libceph: allow ceph_msg_data_advance to advance more than a page
config: xtensa-randconfig-s032-20220210 (https://download.01.org/0day-ci/archive/20220211/202202111549.YqdShhY1-lkp@intel.com/config)
compiler: xtensa-linux-gcc (GCC) 11.2.0
reproduce:
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # apt-get install sparse
        # sparse version: v0.6.4-dirty
        # https://git.kernel.org/pub/scm/linux/kernel/git/jlayton/linux.git/commit/?id=8647843c1c4c4ebffb864d049176b4d847ef3a4b
        git remote add jlayton https://git.kernel.org/pub/scm/linux/kernel/git/jlayton/linux.git
        git fetch --no-tags jlayton ceph-fscrypt
        git checkout 8647843c1c4c4ebffb864d049176b4d847ef3a4b
        # save the config file to linux build tree
        mkdir build_dir
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=xtensa SHELL=/bin/bash net/ceph/

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


sparse warnings: (new ones prefixed by >>)
   net/ceph/messenger.c: note: in included file (through arch/xtensa/include/asm/bitops.h, include/linux/bitops.h, include/linux/log2.h, ...):
   arch/xtensa/include/asm/processor.h:107:2: sparse: sparse: Unsupported xtensa ABI
   arch/xtensa/include/asm/processor.h:137:2: sparse: sparse: Unsupported Xtensa ABI
>> net/ceph/messenger.c:1126:30: sparse: sparse: incompatible types in comparison expression (different type sizes):
>> net/ceph/messenger.c:1126:30: sparse:    unsigned int *
>> net/ceph/messenger.c:1126:30: sparse:    unsigned long *

vim +1126 net/ceph/messenger.c

  1122	
  1123	void ceph_msg_data_advance(struct ceph_msg_data_cursor *cursor, size_t bytes)
  1124	{
  1125		while (bytes) {
> 1126			size_t cur = min(bytes, PAGE_SIZE);
  1127	
  1128			__ceph_msg_data_advance(cursor, cur);
  1129			bytes -= cur;
  1130		}
  1131	}
  1132	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org