linux-kernel - [ammarfaizi2-block:palmer/linux/riscv-pmu 10/15] drivers/perf/riscv_pmu_legacy.c:76: warning: This comment starts with '/**', but isn't a kernel-doc comment. Refer Documentation/doc-guide/kernel-doc.rst

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Date:   Tue, 22 Mar 2022 20:27:07 +0800
From:   kernel test robot <lkp@...el.com>
To:     Atish Patra <atish.patra@....com>
Cc:     kbuild-all@...ts.01.org,
        GNU/Weeb Mailing List <gwml@...r.gnuweeb.org>,
        linux-kernel@...r.kernel.org, Palmer Dabbelt <palmer@...osinc.com>,
        Anup Patel <anup@...infault.org>, linux-doc@...r.kernel.org
Subject: [ammarfaizi2-block:palmer/linux/riscv-pmu 10/15]
 drivers/perf/riscv_pmu_legacy.c:76: warning: This comment starts with '/**',
 but isn't a kernel-doc comment. Refer Documentation/doc-guide/kernel-doc.rst

tree:   https://github.com/ammarfaizi2/linux-block palmer/linux/riscv-pmu
head:   33363c336516e4beb9dd7e8265b369ff96d07dcb
commit: 9b3e150e310ee71d7bae1e31c38a300cfa5e951b [10/15] RISC-V: Add a simple platform driver for RISC-V legacy perf
config: riscv-randconfig-r006-20220320 (https://download.01.org/0day-ci/archive/20220322/202203222043.1RKgCxBP-lkp@intel.com/config)
compiler: riscv64-linux-gcc (GCC) 11.2.0
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
        # https://github.com/ammarfaizi2/linux-block/commit/9b3e150e310ee71d7bae1e31c38a300cfa5e951b
        git remote add ammarfaizi2-block https://github.com/ammarfaizi2/linux-block
        git fetch --no-tags ammarfaizi2-block palmer/linux/riscv-pmu
        git checkout 9b3e150e310ee71d7bae1e31c38a300cfa5e951b
        # save the config file to linux build tree
        mkdir build_dir
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross O=build_dir ARCH=riscv SHELL=/bin/bash drivers/perf/

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@...el.com>

All warnings (new ones prefixed by >>):

>> drivers/perf/riscv_pmu_legacy.c:76: warning: This comment starts with '/**', but isn't a kernel-doc comment. Refer Documentation/doc-guide/kernel-doc.rst
    * This is just a simple implementation to allow legacy implementations


vim +76 drivers/perf/riscv_pmu_legacy.c

    74	
    75	/**
  > 76	 * This is just a simple implementation to allow legacy implementations
    77	 * compatible with new RISC-V PMU driver framework.
    78	 * This driver only allows reading two counters i.e CYCLE & INSTRET.
    79	 * However, it can not start or stop the counter. Thus, it is not very useful
    80	 * will be removed in future.
    81	 */
    82	static void pmu_legacy_init(struct riscv_pmu *pmu)
    83	{
    84		pr_info("Legacy PMU implementation is available\n");
    85	
    86		pmu->num_counters = RISCV_PMU_LEGACY_NUM_CTR;
    87		pmu->ctr_start = pmu_legacy_ctr_start;
    88		pmu->ctr_stop = NULL;
    89		pmu->event_map = pmu_legacy_event_map;
    90		pmu->ctr_get_idx = pmu_legacy_ctr_get_idx;
    91		pmu->ctr_get_width = NULL;
    92		pmu->ctr_clear_idx = NULL;
    93		pmu->ctr_read = pmu_legacy_read_ctr;
    94	
    95		perf_pmu_register(&pmu->pmu, "cpu", PERF_TYPE_RAW);
    96	}
    97	

-- 
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https://01.org/lkp