Hi Dong,

FYI, kernel build failed on

tree:   git://git.kernel.org/pub/scm/linux/kernel/git/sameo/mfd-2.6.git for-next
head:   74d8378159de16a0a1d1975d4778120d263d6000
commit: 87d687301f380729ec320619f100f3ba39f3693d [29/86] mfd: Add syscon driver based on regmap
config: i386-randconfig-m062 (attached as .config)

All error/warnings:

drivers/mfd/syscon.c:94:15: error: variable 'syscon_regmap_config' has initializer but incomplete type
drivers/mfd/syscon.c:95:2: error: unknown field 'reg_bits' specified in initializer
drivers/mfd/syscon.c:95:2: warning: excess elements in struct initializer [enabled by default]
drivers/mfd/syscon.c:95:2: warning: (near initialization for 'syscon_regmap_config') [enabled by default]
drivers/mfd/syscon.c:96:2: error: unknown field 'val_bits' specified in initializer
drivers/mfd/syscon.c:96:2: warning: excess elements in struct initializer [enabled by default]
drivers/mfd/syscon.c:96:2: warning: (near initialization for 'syscon_regmap_config') [enabled by default]
drivers/mfd/syscon.c:97:2: error: unknown field 'reg_stride' specified in initializer
drivers/mfd/syscon.c:97:2: warning: excess elements in struct initializer [enabled by default]
drivers/mfd/syscon.c:97:2: warning: (near initialization for 'syscon_regmap_config') [enabled by default]
drivers/mfd/syscon.c: In function 'syscon_probe':
drivers/mfd/syscon.c:124:2: error: invalid use of undefined type 'struct regmap_config'
drivers/mfd/syscon.c:125:2: error: implicit declaration of function 'devm_regmap_init_mmio' [-Werror=implicit-function-declaration]
drivers/mfd/syscon.c:125:17: warning: assignment makes pointer from integer without a cast [enabled by default]
cc1: some warnings being treated as errors

vim +94 drivers/mfd/syscon.c

87d68730 Dong Aisheng 2012-09-05  88  
87d68730 Dong Aisheng 2012-09-05  89  static const struct of_device_id of_syscon_match[] = {
87d68730 Dong Aisheng 2012-09-05  90  	{ .compatible = "syscon", },
87d68730 Dong Aisheng 2012-09-05  91  	{ },
87d68730 Dong Aisheng 2012-09-05  92  };
87d68730 Dong Aisheng 2012-09-05  93  
87d68730 Dong Aisheng 2012-09-05 @94  static struct regmap_config syscon_regmap_config = {
87d68730 Dong Aisheng 2012-09-05  95  	.reg_bits = 32,
87d68730 Dong Aisheng 2012-09-05  96  	.val_bits = 32,
87d68730 Dong Aisheng 2012-09-05  97  	.reg_stride = 4,

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0-DAY kernel build testing backend         Open Source Technology Center
Fengguang Wu, Yuanhan Liu                              Intel Corporation