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SubjectRe: [PATCH 2/6] arm_pmu: Change API to support 64bit counter values
Hi Suzuki,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on tip/perf/core]
[also build test ERROR on v4.17-rc6 next-20180517]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]

url: https://github.com/0day-ci/linux/commits/Suzuki-K-Poulose/arm64-perf-Support-for-chaining-event-counters/20180521-102117
config: arm-corgi_defconfig (attached as .config)
compiler: arm-linux-gnueabi-gcc (Debian 7.2.0-11) 7.2.0
reproduce:
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# save the attached .config to linux build tree
make.cross ARCH=arm

All errors (new ones prefixed by >>):

arch/arm/kernel/perf_event_xscale.c: In function 'xscale2pmu_init':
>> arch/arm/kernel/perf_event_xscale.c:741:24: error: assignment from incompatible pointer type [-Werror=incompatible-pointer-types]
cpu_pmu->read_counter = xscale2pmu_read_counter;
^
arch/arm/kernel/perf_event_xscale.c:742:25: error: assignment from incompatible pointer type [-Werror=incompatible-pointer-types]
cpu_pmu->write_counter = xscale2pmu_write_counter;
^
cc1: some warnings being treated as errors

vim +741 arch/arm/kernel/perf_event_xscale.c

43eab878 Will Deacon 2010-11-13 734
351a102d Greg Kroah-Hartman 2012-12-21 735 static int xscale2pmu_init(struct arm_pmu *cpu_pmu)
43eab878 Will Deacon 2010-11-13 736 {
3d1ff755 Mark Rutland 2012-12-19 737 cpu_pmu->name = "armv5_xscale2";
513c99ce Sudeep Holla 2012-07-31 738 cpu_pmu->handle_irq = xscale2pmu_handle_irq;
513c99ce Sudeep Holla 2012-07-31 739 cpu_pmu->enable = xscale2pmu_enable_event;
513c99ce Sudeep Holla 2012-07-31 740 cpu_pmu->disable = xscale2pmu_disable_event;
513c99ce Sudeep Holla 2012-07-31 @741 cpu_pmu->read_counter = xscale2pmu_read_counter;
513c99ce Sudeep Holla 2012-07-31 742 cpu_pmu->write_counter = xscale2pmu_write_counter;
513c99ce Sudeep Holla 2012-07-31 743 cpu_pmu->get_event_idx = xscale2pmu_get_event_idx;
513c99ce Sudeep Holla 2012-07-31 744 cpu_pmu->start = xscale2pmu_start;
513c99ce Sudeep Holla 2012-07-31 745 cpu_pmu->stop = xscale2pmu_stop;
513c99ce Sudeep Holla 2012-07-31 746 cpu_pmu->map_event = xscale_map_event;
513c99ce Sudeep Holla 2012-07-31 747 cpu_pmu->num_events = 5;
547faa3c Suzuki K Poulose 2018-05-18 748 cpu_pmu->counter_width = 32;
513c99ce Sudeep Holla 2012-07-31 749
513c99ce Sudeep Holla 2012-07-31 750 return 0;
43eab878 Will Deacon 2010-11-13 751 }
a12c72cc Mark Rutland 2015-05-26 752

:::::: The code at line 741 was first introduced by commit
:::::: 513c99ce4e64245be1f83f56039ec4891b451955 ARM: perf: allocate CPU PMU dynamically at probe time

:::::: TO: Sudeep KarkadaNagesha <Sudeep.KarkadaNagesha@arm.com>
:::::: CC: Will Deacon <will.deacon@arm.com>

---
0-DAY kernel test infrastructure Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all Intel Corporation
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