From: kernel test robot <lkp@intel.com>
To: James Morse <james.morse@arm.com>
Cc: llvm@lists.linux.dev, kbuild-all@lists.01.org,
linux-kernel@vger.kernel.org
Subject: [morse:mpam/snapshot/v5.18 128/146] drivers/platform/mpam/mpam_resctrl.c:309:25: warning: variable 'dom' is uninitialized when used here
Date: Mon, 20 Jun 2022 05:59:57 +0800 [thread overview]
Message-ID: <202206200512.vutoaRFq-lkp@intel.com> (raw)
tree: https://git.kernel.org/pub/scm/linux/kernel/git/morse/linux.git mpam/snapshot/v5.18
head: bac90d25cbdee0fc233b9b1c47d5b6f44101a384
commit: db8847e121228898d170f140698fb01359cff997 [128/146] arm_mpam: resctrl: Add resctrl_arch_rmid_read() and resctrl_arch_reset_rmid()
config: arm64-allmodconfig (https://download.01.org/0day-ci/archive/20220620/202206200512.vutoaRFq-lkp@intel.com/config)
compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project af6d2a0b6825e71965f3e2701a63c239fa0ad70f)
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 arm64 cross compiling tool for clang build
# apt-get install binutils-aarch64-linux-gnu
# https://git.kernel.org/pub/scm/linux/kernel/git/morse/linux.git/commit/?id=db8847e121228898d170f140698fb01359cff997
git remote add morse https://git.kernel.org/pub/scm/linux/kernel/git/morse/linux.git
git fetch --no-tags morse mpam/snapshot/v5.18
git checkout db8847e121228898d170f140698fb01359cff997
# save the config file
mkdir build_dir && cp config build_dir/.config
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=arm64 SHELL=/bin/bash drivers/perf/ drivers/platform/mpam/
If you fix the issue, kindly add following tag where applicable
Reported-by: kernel test robot <lkp@intel.com>
All warnings (new ones prefixed by >>):
>> drivers/platform/mpam/mpam_resctrl.c:309:25: warning: variable 'dom' is uninitialized when used here [-Wuninitialized]
mpam_msmon_reset_mbwu(dom->comp, &cfg);
^~~
drivers/platform/mpam/mpam_resctrl.c:298:30: note: initialize the variable 'dom' to silence this warning
struct mpam_resctrl_dom *dom;
^
= NULL
1 warning generated.
vim +/dom +309 drivers/platform/mpam/mpam_resctrl.c
293
294 void resctrl_arch_reset_rmid(struct rdt_resource *r, struct rdt_domain *d,
295 u32 closid, u32 rmid, enum resctrl_event_id eventid)
296 {
297 struct mon_cfg cfg;
298 struct mpam_resctrl_dom *dom;
299
300 if (eventid != QOS_L3_MBM_LOCAL_EVENT_ID)
301 return;
302
303 cfg.mon = resctrl_arch_rmid_idx_encode(closid, rmid);
304 cfg.match_pmg = true;
305 cfg.pmg = rmid;
306
307 if (cdp_enabled) {
308 cfg.partid = closid << 1;
> 309 mpam_msmon_reset_mbwu(dom->comp, &cfg);
310
311 cfg.partid += 1;
312 mpam_msmon_reset_mbwu(dom->comp, &cfg);
313 } else {
314 cfg.partid = closid;
315 mpam_msmon_reset_mbwu(dom->comp, &cfg);
316 }
317 }
318
--
0-DAY CI Kernel Test Service
https://01.org/lkp
reply other threads:[~2022-06-19 22:00 UTC|newest]
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