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Message-ID: <202408220027.kA3pRF6J-lkp@intel.com>
Date: Thu, 22 Aug 2024 00:52:44 +0800
From: kernel test robot <lkp@...el.com>
To: Paolo Abeni <pabeni@...hat.com>, netdev@...r.kernel.org
Cc: oe-kbuild-all@...ts.linux.dev, Jakub Kicinski <kuba@...nel.org>,
Jiri Pirko <jiri@...nulli.us>,
Madhu Chittim <madhu.chittim@...el.com>,
Sridhar Samudrala <sridhar.samudrala@...el.com>,
Simon Horman <horms@...nel.org>,
John Fastabend <john.fastabend@...il.com>,
Sunil Kovvuri Goutham <sgoutham@...vell.com>,
Jamal Hadi Salim <jhs@...atatu.com>,
Donald Hunter <donald.hunter@...il.com>
Subject: Re: [PATCH v4 net-next 09/12] testing: net-drv: add basic shaper test
Hi Paolo,
kernel test robot noticed the following build warnings:
[auto build test WARNING on net-next/main]
url: https://github.com/intel-lab-lkp/linux/commits/Paolo-Abeni/tools-ynl-lift-an-assumption-about-spec-file-name/20240820-231626
base: net-next/main
patch link: https://lore.kernel.org/r/4cf74f285fa5f07be546cb83ef96775f86aa0dbf.1724165948.git.pabeni%40redhat.com
patch subject: [PATCH v4 net-next 09/12] testing: net-drv: add basic shaper test
config: hexagon-randconfig-r112-20240821 (https://download.01.org/0day-ci/archive/20240822/202408220027.kA3pRF6J-lkp@intel.com/config)
compiler: clang version 16.0.6 (https://github.com/llvm/llvm-project 7cbf1a2591520c2491aa35339f227775f4d3adf6)
reproduce: (https://download.01.org/0day-ci/archive/20240822/202408220027.kA3pRF6J-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/202408220027.kA3pRF6J-lkp@intel.com/
sparse warnings: (new ones prefixed by >>)
>> net/shaper/shaper.c:227:24: sparse: sparse: Using plain integer as NULL pointer
vim +227 net/shaper/shaper.c
d8a22f9bfdaade Paolo Abeni 2024-08-20 208
d8a22f9bfdaade Paolo Abeni 2024-08-20 209 /* Allocate on demand the per device shaper's cache. */
d8a22f9bfdaade Paolo Abeni 2024-08-20 210 static struct mutex *net_shaper_cache_init(struct net_device *dev,
d8a22f9bfdaade Paolo Abeni 2024-08-20 211 struct netlink_ext_ack *extack)
d8a22f9bfdaade Paolo Abeni 2024-08-20 212 {
d8a22f9bfdaade Paolo Abeni 2024-08-20 213 struct net_shaper_data *new, *data = READ_ONCE(dev->net_shaper_data);
d8a22f9bfdaade Paolo Abeni 2024-08-20 214
d8a22f9bfdaade Paolo Abeni 2024-08-20 215 if (!data) {
d8a22f9bfdaade Paolo Abeni 2024-08-20 216 new = kmalloc(sizeof(*dev->net_shaper_data), GFP_KERNEL);
d8a22f9bfdaade Paolo Abeni 2024-08-20 217 if (!new) {
d8a22f9bfdaade Paolo Abeni 2024-08-20 218 NL_SET_ERR_MSG(extack, "Can't allocate memory for shaper data");
d8a22f9bfdaade Paolo Abeni 2024-08-20 219 return NULL;
d8a22f9bfdaade Paolo Abeni 2024-08-20 220 }
d8a22f9bfdaade Paolo Abeni 2024-08-20 221
d8a22f9bfdaade Paolo Abeni 2024-08-20 222 mutex_init(&new->lock);
d8a22f9bfdaade Paolo Abeni 2024-08-20 223 xa_init(&new->shapers);
d8a22f9bfdaade Paolo Abeni 2024-08-20 224 idr_init(&new->node_ids);
d8a22f9bfdaade Paolo Abeni 2024-08-20 225
d8a22f9bfdaade Paolo Abeni 2024-08-20 226 /* No lock acquired yet, we can race with other operations. */
d8a22f9bfdaade Paolo Abeni 2024-08-20 @227 data = cmpxchg(&dev->net_shaper_data, NULL, new);
d8a22f9bfdaade Paolo Abeni 2024-08-20 228 if (!data)
d8a22f9bfdaade Paolo Abeni 2024-08-20 229 data = new;
d8a22f9bfdaade Paolo Abeni 2024-08-20 230 else
d8a22f9bfdaade Paolo Abeni 2024-08-20 231 kfree(new);
d8a22f9bfdaade Paolo Abeni 2024-08-20 232 }
d8a22f9bfdaade Paolo Abeni 2024-08-20 233 return &data->lock;
d8a22f9bfdaade Paolo Abeni 2024-08-20 234 }
d8a22f9bfdaade Paolo Abeni 2024-08-20 235
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
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