[tip:locking/core 1/3] kernel/sched/core.c:10713 cpu_uclamp_print() error: uninitialized symbol 'util_clamp'.

[tip:locking/core 1/3] kernel/sched/core.c:10713 cpu_uclamp_print() error: uninitialized symbol 'util_clamp'.

[kernel test robot]

BCC: lkp@intel.com
CC: oe-kbuild-all@lists.linux.dev
CC: linux-kernel@vger.kernel.org
CC: x86@kernel.org
TO: Peter Zijlstra <peterz@infradead.org>

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git locking/core
head:   18caaedaf4c3712ab6821f292598a8f86e6d7972
commit: e4ab322fbaaaf84b23d6cb0e3317a7f68baf36dc [1/3] cleanup: Add conditional guard support
:::::: branch date: 2 days ago
:::::: commit date: 2 weeks ago
config: mips-randconfig-r081-20231129 (https://download.01.org/0day-ci/archive/20231129/202311291930.SXx3ynxt-lkp@intel.com/config)
compiler: mips-linux-gcc (GCC) 13.2.0
reproduce: (https://download.01.org/0day-ci/archive/20231129/202311291930.SXx3ynxt-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@intel.com>
| Reported-by: Dan Carpenter <error27@gmail.com>
| Closes: https://lore.kernel.org/r/202311291930.SXx3ynxt-lkp@intel.com/

smatch warnings:
kernel/sched/core.c:10713 cpu_uclamp_print() error: uninitialized symbol 'util_clamp'.
kernel/sched/core.c:10718 cpu_uclamp_print() error: potentially dereferencing uninitialized 'tg'.

vim +/util_clamp +10713 kernel/sched/core.c

2480c093130f64 Patrick Bellasi 2019-08-22  10699  
2480c093130f64 Patrick Bellasi 2019-08-22  10700  static inline void cpu_uclamp_print(struct seq_file *sf,
2480c093130f64 Patrick Bellasi 2019-08-22  10701  				    enum uclamp_id clamp_id)
2480c093130f64 Patrick Bellasi 2019-08-22  10702  {
2480c093130f64 Patrick Bellasi 2019-08-22  10703  	struct task_group *tg;
2480c093130f64 Patrick Bellasi 2019-08-22  10704  	u64 util_clamp;
2480c093130f64 Patrick Bellasi 2019-08-22  10705  	u64 percent;
2480c093130f64 Patrick Bellasi 2019-08-22  10706  	u32 rem;
2480c093130f64 Patrick Bellasi 2019-08-22  10707  
0e34600ac9317d Peter Zijlstra  2023-06-09  10708  	scoped_guard (rcu) {
2480c093130f64 Patrick Bellasi 2019-08-22  10709  		tg = css_tg(seq_css(sf));
2480c093130f64 Patrick Bellasi 2019-08-22  10710  		util_clamp = tg->uclamp_req[clamp_id].value;
0e34600ac9317d Peter Zijlstra  2023-06-09  10711  	}
2480c093130f64 Patrick Bellasi 2019-08-22  10712  
2480c093130f64 Patrick Bellasi 2019-08-22 @10713  	if (util_clamp == SCHED_CAPACITY_SCALE) {
2480c093130f64 Patrick Bellasi 2019-08-22  10714  		seq_puts(sf, "max\n");
2480c093130f64 Patrick Bellasi 2019-08-22  10715  		return;
2480c093130f64 Patrick Bellasi 2019-08-22  10716  	}
2480c093130f64 Patrick Bellasi 2019-08-22  10717  
2480c093130f64 Patrick Bellasi 2019-08-22 @10718  	percent = tg->uclamp_pct[clamp_id];
2480c093130f64 Patrick Bellasi 2019-08-22  10719  	percent = div_u64_rem(percent, POW10(UCLAMP_PERCENT_SHIFT), &rem);
2480c093130f64 Patrick Bellasi 2019-08-22  10720  	seq_printf(sf, "%llu.%0*u\n", percent, UCLAMP_PERCENT_SHIFT, rem);
2480c093130f64 Patrick Bellasi 2019-08-22  10721  }
2480c093130f64 Patrick Bellasi 2019-08-22  10722  

:::::: The code at line 10713 was first introduced by commit
:::::: 2480c093130f64ac3a410504fa8b3db1fc4b87ce sched/uclamp: Extend CPU's cgroup controller

:::::: TO: Patrick Bellasi <patrick.bellasi@arm.com>
:::::: CC: Ingo Molnar <mingo@kernel.org>

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