linux-kernel - Re: [PATCH 1/2] drivers: dma-coherent: Add support for default DMA coherent pool

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Date:   Wed, 5 Jul 2017 13:55:36 +0800
From:   kbuild test robot <lkp@...el.com>
To:     vitaly_kuzmichev@...tor.com
Cc:     kbuild-all@...org, gregkh@...uxfoundation.org,
        mark.rutland@....com, robh+dt@...nel.org,
        linux-kernel@...r.kernel.org, devicetree@...r.kernel.org,
        george_davis@...tor.com, vitaly_kuzmichev@...tor.com
Subject: Re: [PATCH 1/2] drivers: dma-coherent: Add support for default DMA
 coherent pool

Hi George,

[auto build test ERROR on staging/staging-testing]
[also build test ERROR on v4.12]
[cannot apply to next-20170704]
[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/vitaly_kuzmichev-mentor-com/drivers-dma-coherent-Add-support-for-default-DMA-coherent-pool/20170705-040238
config: i386-randconfig-c0-07051154 (attached as .config)
compiler: gcc-4.9 (Debian 4.9.4-2) 4.9.4
reproduce:
        # save the attached .config to linux build tree
        make ARCH=i386 

All error/warnings (new ones prefixed by >>):

   In file included from include/uapi/linux/stddef.h:1:0,
                    from include/linux/stddef.h:4,
                    from include/uapi/linux/posix_types.h:4,
                    from include/uapi/linux/types.h:13,
                    from include/linux/types.h:5,
                    from include/linux/io.h:21,
                    from drivers//base/dma-coherent.c:5:
   drivers//base/dma-coherent.c: In function 'dev_get_dma_area':
>> drivers//base/dma-coherent.c:28:16: error: 'struct device' has no member named 'cma_area'
     if (dev && dev->cma_area)
                   ^
   include/linux/compiler.h:160:30: note: in definition of macro '__trace_if'
     if (__builtin_constant_p(!!(cond)) ? !!(cond) :   \
                                 ^
>> drivers//base/dma-coherent.c:28:2: note: in expansion of macro 'if'
     if (dev && dev->cma_area)
     ^
>> drivers//base/dma-coherent.c:28:16: error: 'struct device' has no member named 'cma_area'
     if (dev && dev->cma_area)
                   ^
   include/linux/compiler.h:160:42: note: in definition of macro '__trace_if'
     if (__builtin_constant_p(!!(cond)) ? !!(cond) :   \
                                             ^
>> drivers//base/dma-coherent.c:28:2: note: in expansion of macro 'if'
     if (dev && dev->cma_area)
     ^
>> drivers//base/dma-coherent.c:28:16: error: 'struct device' has no member named 'cma_area'
     if (dev && dev->cma_area)
                   ^
   include/linux/compiler.h:171:16: note: in definition of macro '__trace_if'
      ______r = !!(cond);     \
                   ^
>> drivers//base/dma-coherent.c:28:2: note: in expansion of macro 'if'
     if (dev && dev->cma_area)
     ^

vim +28 drivers//base/dma-coherent.c

     1	/*
     2	 * Coherent per-device memory handling.
     3	 * Borrowed from i386
     4	 */
   > 5	#include <linux/io.h>
     6	#include <linux/slab.h>
     7	#include <linux/kernel.h>
     8	#include <linux/module.h>
     9	#include <linux/dma-mapping.h>
    10	
    11	struct dma_coherent_mem {
    12		void		*virt_base;
    13		dma_addr_t	device_base;
    14		unsigned long	pfn_base;
    15		int		size;
    16		int		flags;
    17		unsigned long	*bitmap;
    18		spinlock_t	spinlock;
    19	};
    20	
    21	static struct dma_coherent_mem **dma_coherent_default_area;
    22	
    23	static inline struct dma_coherent_mem *dev_get_dma_area(struct device *dev)
    24	{
    25		if (dev && dev->dma_mem)
    26			return dev->dma_mem;
    27	#ifdef CONFIG_CMA
  > 28		if (dev && dev->cma_area)
    29			return NULL;
    30	#endif
    31		return dma_coherent_default_area ? *dma_coherent_default_area : NULL;

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