Re: [RFC PATCH v9 24/26] RDMA/rxe: Add wait_for_completion to pool objects

[kernel test robot <lkp@intel.com>]

Hi Bob,

[FYI, it's a private test report for your RFC patch.]
[auto build test WARNING on rdma/for-next]
[also build test WARNING on v5.17-rc1 next-20220127]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch]

url:    https://github.com/0day-ci/linux/commits/Bob-Pearson/RDMA-rxe-Move-rxe_mcast_add-delete-to-rxe_mcast-c/20220128-063757
base:   https://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma.git for-next
config: x86_64-randconfig-a016-20220124 (https://download.01.org/0day-ci/archive/20220128/202201281100.RzpcbUSw-lkp@intel.com/config)
compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project 33b45ee44b1f32ffdbc995e6fec806271b4b3ba4)
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # https://github.com/0day-ci/linux/commit/0b97a20ee58915580069267b6e4ec2e643dc12b5
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Bob-Pearson/RDMA-rxe-Move-rxe_mcast_add-delete-to-rxe_mcast-c/20220128-063757
        git checkout 0b97a20ee58915580069267b6e4ec2e643dc12b5
        # save the config file to linux build tree
        mkdir build_dir
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash drivers/infiniband/sw/rxe/

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

All warnings (new ones prefixed by >>):

>> drivers/infiniband/sw/rxe/rxe_pool.c:287:2: warning: variable 'ret' is used uninitialized whenever 'if' condition is false [-Wsometimes-uninitialized]
           if (timeout) {
           ^~~~~~~~~~~~
   include/linux/compiler.h:56:28: note: expanded from macro 'if'
   #define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) )
                              ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   include/linux/compiler.h:58:30: note: expanded from macro '__trace_if_var'
   #define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond))
                                ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   drivers/infiniband/sw/rxe/rxe_pool.c:303:9: note: uninitialized use occurs here
           return ret;
                  ^~~
   drivers/infiniband/sw/rxe/rxe_pool.c:287:2: note: remove the 'if' if its condition is always true
           if (timeout) {
           ^~~~~~~~~~~~~
   include/linux/compiler.h:56:23: note: expanded from macro 'if'
   #define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) )
                         ^
   drivers/infiniband/sw/rxe/rxe_pool.c:285:9: note: initialize the variable 'ret' to silence this warning
           int ret;
                  ^
                   = 0
   1 warning generated.


vim +287 drivers/infiniband/sw/rxe/rxe_pool.c

   279	
   280	int __rxe_wait(struct rxe_pool_elem *elem)
   281	{
   282		struct rxe_pool *pool = elem->pool;
   283		static int timeout = RXE_POOL_TIMEOUT;
   284		static int timeout_failures;
   285		int ret;
   286	
 > 287		if (timeout) {

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