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Subject[ammarfaizi2-block:google/android/kernel/common/android12-5.10 2348/9999] drivers/android/binder.c:1373:70: sparse: sparse: Using plain integer as NULL pointer
tree:   https://github.com/ammarfaizi2/linux-block google/android/kernel/common/android12-5.10
head: f3ca80cced4e447653b51be876c026c337d84702
commit: 35014985c266face161f6d107f8d8338e02a0b2d [2348/9999] ANDROID: vendor_hooks: Add hooks for binder proc transaction
config: x86_64-randconfig-s021 (https://download.01.org/0day-ci/archive/20220315/202203150146.7GOxXHYj-lkp@intel.com/config)
compiler: gcc-9 (Ubuntu 9.4.0-1ubuntu1~20.04) 9.4.0
reproduce:
# apt-get install sparse
# sparse version: v0.6.4-dirty
# https://github.com/ammarfaizi2/linux-block/commit/35014985c266face161f6d107f8d8338e02a0b2d
git remote add ammarfaizi2-block https://github.com/ammarfaizi2/linux-block
git fetch --no-tags ammarfaizi2-block google/android/kernel/common/android12-5.10
git checkout 35014985c266face161f6d107f8d8338e02a0b2d
# 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=x86_64 SHELL=/bin/bash drivers/android/

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


sparse warnings: (new ones prefixed by >>)
>> drivers/android/binder.c:1373:70: sparse: sparse: Using plain integer as NULL pointer
drivers/android/binder.c:2508:41: sparse: sparse: Using plain integer as NULL pointer
drivers/android/binder.c:4580:24: sparse: sparse: incorrect type in return expression (different base types) @@ expected restricted __poll_t @@ got int @@
drivers/android/binder.c:4580:24: sparse: expected restricted __poll_t
drivers/android/binder.c:4580:24: sparse: got int

vim +1373 drivers/android/binder.c

1363
1364 /**
1365 * binder_free_ref() - free the binder_ref
1366 * @ref: ref to free
1367 *
1368 * Free the binder_ref. Free the binder_node indicated by ref->node
1369 * (if non-NULL) and the binder_ref_death indicated by ref->death.
1370 */
1371 static void binder_free_ref(struct binder_ref *ref)
1372 {
> 1373 trace_android_vh_binder_del_ref(ref->proc ? ref->proc->tsk : 0, ref->data.desc);
1374 if (ref->node)
1375 binder_free_node(ref->node);
1376 kfree(ref->death);
1377 kfree(ref);
1378 }
1379

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

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