2:45 a.m.
tree: https://git.kernel.org/pub/scm/linux/kernel/git/saeed/linux.git net-next-mlx5
head: e62d498381ea0759db87eae9a0d7ef9069959f5e
commit: c29361b902ee230b93b69f205b2964c73088f82c [34/42] net/mlx5: DR, Handle ICM memory
via buddy allocation instead of bucket management
config: powerpc-randconfig-r022-20200918 (attached as .config)
compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project
0ff28fa6a75617d61b1aeea77463d6a1684c3c89)
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
# install powerpc cross compiling tool for clang build
# apt-get install binutils-powerpc-linux-gnu
git checkout c29361b902ee230b93b69f205b2964c73088f82c
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=powerpc
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp(a)intel.com>
All warnings (new ones prefixed by >>):
>
drivers/net/ethernet/mellanox/mlx5/core/steering/dr_icm_pool.c:393:6: warning: variable
'chunk' is used uninitialized whenever 'if' condition is true
[-Wsometimes-uninitialized]
if (ret)
^~~
drivers/net/ethernet/mellanox/mlx5/core/steering/dr_icm_pool.c:406:9: note:
uninitialized use occurs here
return chunk;
^~~~~
drivers/net/ethernet/mellanox/mlx5/core/steering/dr_icm_pool.c:393:2: note: remove the
'if' if its condition is always false
if (ret)
^~~~~~~~
drivers/net/ethernet/mellanox/mlx5/core/steering/dr_icm_pool.c:383:32: note: initialize
the variable 'chunk' to silence this warning
struct mlx5dr_icm_chunk *chunk;
^
= NULL
1 warning generated.
#
https://git.kernel.org/pub/scm/linux/kernel/git/saeed/linux.git/commit/?i...
git remote add saeed https://git.kernel.org/pub/scm/linux/kernel/git/saeed/linux.git
git fetch --no-tags saeed net-next-mlx5
git checkout c29361b902ee230b93b69f205b2964c73088f82c
vim +393 drivers/net/ethernet/mellanox/mlx5/core/steering/dr_icm_pool.c
374
375 /* Allocate an ICM chunk, each chunk holds a piece of ICM memory and
376 * also memory used for HW STE management for optimizations.
377 */
378 struct mlx5dr_icm_chunk *
379 mlx5dr_icm_alloc_chunk(struct mlx5dr_icm_pool *pool,
380 enum mlx5dr_icm_chunk_size chunk_size)
381 {
382 struct mlx5dr_icm_buddy_mem *buddy;
383 struct mlx5dr_icm_chunk *chunk;
384 unsigned int seg;
385 int ret;
386
387 if (chunk_size > pool->max_log_chunk_sz)
388 return NULL;
389
390 mutex_lock(&pool->mutex);
391 /* find mem, get back the relevant buddy pool and seg in that mem */
392 ret = dr_icm_handle_buddies_get_mem(pool, chunk_size, &buddy, &seg);
393 if (ret)
394 goto out;
395
396 chunk = dr_icm_chunk_create(pool, chunk_size, buddy, seg);
397 if (!chunk)
398 goto out_err;
399
400 goto out;
401
402 out_err:
403 mlx5dr_buddy_free_mem(buddy, seg, chunk_size);
404 out:
405 mutex_unlock(&pool->mutex);
406 return chunk;
407 }
408
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org