netdev - Re: [PATCH net-next 2/2] cxgb4: speed up on-chip memory read

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Message-ID: <201801161019.F0Oplu28%fengguang.wu@intel.com>
Date:   Tue, 16 Jan 2018 10:56:49 +0800
From:   kbuild test robot <lkp@...el.com>
To:     Rahul Lakkireddy <rahul.lakkireddy@...lsio.com>
Cc:     kbuild-all@...org, netdev@...r.kernel.org, davem@...emloft.net,
        ganeshgr@...lsio.com, nirranjan@...lsio.com, indranil@...lsio.com,
        Rahul Lakkireddy <rahul.lakkireddy@...lsio.com>
Subject: Re: [PATCH net-next 2/2] cxgb4: speed up on-chip memory read

Hi Rahul,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on net-next/master]

url:    https://github.com/0day-ci/linux/commits/Rahul-Lakkireddy/cxgb4-rework-on-chip-memory-read/20180116-050826
reproduce:
        # apt-get install sparse
        make ARCH=x86_64 allmodconfig
        make C=1 CF=-D__CHECK_ENDIAN__


sparse warnings: (new ones prefixed by >>)

>> drivers/net/ethernet/chelsio/cxgb4/cudbg_intrinsic_avx.c:48:21: sparse: cast removes address space of expression

vim +48 drivers/net/ethernet/chelsio/cxgb4/cudbg_intrinsic_avx.c

    37	
    38	unsigned int cudbg_mem_read_avx(struct cudbg_init *pdbg_init, u32 start,
    39					u32 offset, u32 size, u32 mem_aperture,
    40					u8 *outbuf)
    41	{
    42	#ifdef CONFIG_AS_AVX
    43		u32 max_read_len = CUDBG_MEM_ALIGN_AVX;
    44		struct adapter *adap = pdbg_init->adap;
    45		u8 *reg_addr, *src_addr, *dst_addr;
    46		u32 bytes_read, read_len;
    47	
  > 48		reg_addr = (u8 *)adap->regs + start + offset;

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