arch/powerpc/perf/core-fsl-emb.c:648:13: warning: variable 'found' set but not used
From: kernel test robot
Date: Mon Aug 21 2023 - 18:53:23 EST
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: f7757129e3dea336c407551c98f50057c22bb266
commit: 0069f3d14e7a656ba9d7dbaac72659687fdbf43c powerpc/64e: Tie PPC_BOOK3E_64 to PPC_E500MC
date: 11 months ago
config: powerpc64-randconfig-r031-20230822 (https://download.01.org/0day-ci/archive/20230822/202308220658.OR5hHFcD-lkp@xxxxxxxxx/config)
compiler: powerpc64-linux-gcc (GCC) 12.3.0
reproduce: (https://download.01.org/0day-ci/archive/20230822/202308220658.OR5hHFcD-lkp@xxxxxxxxx/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@xxxxxxxxx>
| Closes: https://lore.kernel.org/oe-kbuild-all/202308220658.OR5hHFcD-lkp@xxxxxxxxx/
All warnings (new ones prefixed by >>):
arch/powerpc/perf/core-fsl-emb.c: In function 'perf_event_interrupt':
>> arch/powerpc/perf/core-fsl-emb.c:648:13: warning: variable 'found' set but not used [-Wunused-but-set-variable]
648 | int found = 0;
| ^~~~~
arch/powerpc/perf/core-fsl-emb.c: At top level:
>> arch/powerpc/perf/core-fsl-emb.c:675:6: warning: no previous prototype for 'hw_perf_event_setup' [-Wmissing-prototypes]
675 | void hw_perf_event_setup(int cpu)
| ^~~~~~~~~~~~~~~~~~~
vim +/found +648 arch/powerpc/perf/core-fsl-emb.c
a11106544f33c1 arch/powerpc/kernel/perf_event_fsl_emb.c Scott Wood 2010-02-25 641
a11106544f33c1 arch/powerpc/kernel/perf_event_fsl_emb.c Scott Wood 2010-02-25 642 static void perf_event_interrupt(struct pt_regs *regs)
a11106544f33c1 arch/powerpc/kernel/perf_event_fsl_emb.c Scott Wood 2010-02-25 643 {
a11106544f33c1 arch/powerpc/kernel/perf_event_fsl_emb.c Scott Wood 2010-02-25 644 int i;
69111bac42f5ce arch/powerpc/perf/core-fsl-emb.c Christoph Lameter 2014-10-21 645 struct cpu_hw_events *cpuhw = this_cpu_ptr(&cpu_hw_events);
a11106544f33c1 arch/powerpc/kernel/perf_event_fsl_emb.c Scott Wood 2010-02-25 646 struct perf_event *event;
a11106544f33c1 arch/powerpc/kernel/perf_event_fsl_emb.c Scott Wood 2010-02-25 647 unsigned long val;
a11106544f33c1 arch/powerpc/kernel/perf_event_fsl_emb.c Scott Wood 2010-02-25 @648 int found = 0;
a11106544f33c1 arch/powerpc/kernel/perf_event_fsl_emb.c Scott Wood 2010-02-25 649
a11106544f33c1 arch/powerpc/kernel/perf_event_fsl_emb.c Scott Wood 2010-02-25 650 for (i = 0; i < ppmu->n_counter; ++i) {
a11106544f33c1 arch/powerpc/kernel/perf_event_fsl_emb.c Scott Wood 2010-02-25 651 event = cpuhw->event[i];
a11106544f33c1 arch/powerpc/kernel/perf_event_fsl_emb.c Scott Wood 2010-02-25 652
a11106544f33c1 arch/powerpc/kernel/perf_event_fsl_emb.c Scott Wood 2010-02-25 653 val = read_pmc(i);
a11106544f33c1 arch/powerpc/kernel/perf_event_fsl_emb.c Scott Wood 2010-02-25 654 if ((int)val < 0) {
a11106544f33c1 arch/powerpc/kernel/perf_event_fsl_emb.c Scott Wood 2010-02-25 655 if (event) {
a11106544f33c1 arch/powerpc/kernel/perf_event_fsl_emb.c Scott Wood 2010-02-25 656 /* event has overflowed */
a11106544f33c1 arch/powerpc/kernel/perf_event_fsl_emb.c Scott Wood 2010-02-25 657 found = 1;
a8b0ca17b80e92 arch/powerpc/kernel/perf_event_fsl_emb.c Peter Zijlstra 2011-06-27 658 record_and_restart(event, val, regs);
a11106544f33c1 arch/powerpc/kernel/perf_event_fsl_emb.c Scott Wood 2010-02-25 659 } else {
a11106544f33c1 arch/powerpc/kernel/perf_event_fsl_emb.c Scott Wood 2010-02-25 660 /*
a11106544f33c1 arch/powerpc/kernel/perf_event_fsl_emb.c Scott Wood 2010-02-25 661 * Disabled counter is negative,
a11106544f33c1 arch/powerpc/kernel/perf_event_fsl_emb.c Scott Wood 2010-02-25 662 * reset it just in case.
a11106544f33c1 arch/powerpc/kernel/perf_event_fsl_emb.c Scott Wood 2010-02-25 663 */
a11106544f33c1 arch/powerpc/kernel/perf_event_fsl_emb.c Scott Wood 2010-02-25 664 write_pmc(i, 0);
a11106544f33c1 arch/powerpc/kernel/perf_event_fsl_emb.c Scott Wood 2010-02-25 665 }
a11106544f33c1 arch/powerpc/kernel/perf_event_fsl_emb.c Scott Wood 2010-02-25 666 }
a11106544f33c1 arch/powerpc/kernel/perf_event_fsl_emb.c Scott Wood 2010-02-25 667 }
a11106544f33c1 arch/powerpc/kernel/perf_event_fsl_emb.c Scott Wood 2010-02-25 668
a11106544f33c1 arch/powerpc/kernel/perf_event_fsl_emb.c Scott Wood 2010-02-25 669 /* PMM will keep counters frozen until we return from the interrupt. */
a11106544f33c1 arch/powerpc/kernel/perf_event_fsl_emb.c Scott Wood 2010-02-25 670 mtmsr(mfmsr() | MSR_PMM);
a11106544f33c1 arch/powerpc/kernel/perf_event_fsl_emb.c Scott Wood 2010-02-25 671 mtpmr(PMRN_PMGC0, PMGC0_PMIE | PMGC0_FCECE);
a11106544f33c1 arch/powerpc/kernel/perf_event_fsl_emb.c Scott Wood 2010-02-25 672 isync();
a11106544f33c1 arch/powerpc/kernel/perf_event_fsl_emb.c Scott Wood 2010-02-25 673 }
a11106544f33c1 arch/powerpc/kernel/perf_event_fsl_emb.c Scott Wood 2010-02-25 674
a11106544f33c1 arch/powerpc/kernel/perf_event_fsl_emb.c Scott Wood 2010-02-25 @675 void hw_perf_event_setup(int cpu)
a11106544f33c1 arch/powerpc/kernel/perf_event_fsl_emb.c Scott Wood 2010-02-25 676 {
a11106544f33c1 arch/powerpc/kernel/perf_event_fsl_emb.c Scott Wood 2010-02-25 677 struct cpu_hw_events *cpuhw = &per_cpu(cpu_hw_events, cpu);
a11106544f33c1 arch/powerpc/kernel/perf_event_fsl_emb.c Scott Wood 2010-02-25 678
a11106544f33c1 arch/powerpc/kernel/perf_event_fsl_emb.c Scott Wood 2010-02-25 679 memset(cpuhw, 0, sizeof(*cpuhw));
a11106544f33c1 arch/powerpc/kernel/perf_event_fsl_emb.c Scott Wood 2010-02-25 680 }
a11106544f33c1 arch/powerpc/kernel/perf_event_fsl_emb.c Scott Wood 2010-02-25 681
:::::: The code at line 648 was first introduced by commit
:::::: a11106544f33c104706ae42d27219a409b67478e powerpc/perf: e500 support
:::::: TO: Scott Wood <scottwood@xxxxxxxxxxxxx>
:::::: CC: Kumar Gala <galak@xxxxxxxxxxxxxxxxxxx>
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