[nomadik:ixp4 13/54] drivers//mtd/maps/physmap-ixp4xx.c:40:4: error: #error CONFIG_MTD_CFI_BE_BYTE_SWAP required for LE operation

[nomadik:ixp4 13/54] drivers//mtd/maps/physmap-ixp4xx.c:40:4: error: #error CONFIG_MTD_CFI_BE_BYTE_SWAP required for LE operation

[kbuild test robot]

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tree:   https://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-nomadik.git ixp4
head:   053c8f0451e047c9d2efe70a7a66e962aceb684d
commit: dbaf6263142ce5d89ad7986d15d3a37f747f28f3 [13/54] mtd: physmap_of: add a hook for Intel IXP4xx flash probing
config: s390-allyesconfig (attached as .config)
compiler: s390x-linux-gnu-gcc (Debian 8.2.0-11) 8.2.0
reproduce:
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        git checkout dbaf6263142ce5d89ad7986d15d3a37f747f28f3
        # save the attached .config to linux build tree
        GCC_VERSION=8.2.0 make.cross ARCH=s390 

All errors (new ones prefixed by >>):

>> drivers//mtd/maps/physmap-ixp4xx.c:40:4: error: #error CONFIG_MTD_CFI_BE_BYTE_SWAP required for LE operation
    #  error CONFIG_MTD_CFI_BE_BYTE_SWAP required for LE operation
       ^~~~~

vim +40 drivers//mtd/maps/physmap-ixp4xx.c

    18	
    19	/*
    20	 * Read/write a 16 bit word from flash address 'addr'.
    21	 *
    22	 * When the cpu is in little-endian mode it swizzles the address lines
    23	 * ('address coherency') so we need to undo the swizzling to ensure commands
    24	 * and the like end up on the correct flash address.
    25	 *
    26	 * To further complicate matters, due to the way the expansion bus controller
    27	 * handles 32 bit reads, the byte stream ABCD is stored on the flash as:
    28	 *     D15    D0
    29	 *     +---+---+
    30	 *     | A | B | 0
    31	 *     +---+---+
    32	 *     | C | D | 2
    33	 *     +---+---+
    34	 * This means that on LE systems each 16 bit word must be swapped. Note that
    35	 * this requires CONFIG_MTD_CFI_BE_BYTE_SWAP to be enabled to 'unswap' the CFI
    36	 * data and other flash commands which are always in D7-D0.
    37	 */
    38	#ifndef __ARMEB__
    39	#ifndef CONFIG_MTD_CFI_BE_BYTE_SWAP
  > 40	#  error CONFIG_MTD_CFI_BE_BYTE_SWAP required for LE operation
    41	#endif
    42	

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

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