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Date:	Wed, 19 Dec 2012 10:11:02 +0800
From:	Fengguang Wu <>
To:	Linus Torvalds <>,
	Wolfram Sang <>,
	LKML <>
Subject: arch/arm/mach-omap2/i2c.c:130:2: error: implicit declaration of
 function 'omap_pm_set_max_mpu_wakeup_lat'

Hi Linus, Wolfram,

FYI, kernel build failed on

tree:   git:// master
head:   752451f01c4567b506bf4343082682dbb8fb30dd
commit: 752451f01c4567b506bf4343082682dbb8fb30dd Merge branch 'i2c-embedded/for-next' of git://
date:   56 minutes ago
config: make ARCH=arm omap2plus_defconfig

All error/warnings:

arch/arm/mach-omap2/i2c.c: In function 'omap_pm_set_max_mpu_wakeup_lat_compat':
arch/arm/mach-omap2/i2c.c:130:2: error: implicit declaration of function 'omap_pm_set_max_mpu_wakeup_lat' [-Werror=implicit-function-declaration]
cc1: some warnings being treated as errors

The root cause is, i2c.c (which is always compiled in arch/arm/mach-omap2/Makefile)
uses omap_pm_set_max_mpu_wakeup_lat() which is defined in omap-pm-noop.c (which
is compiled only on CONFIG_OMAP_PM_NOOP).

vim +/omap_pm_set_max_mpu_wakeup_lat +130 arch/arm/mach-omap2/i2c.c

752451f0 Linus Torvalds 2012-12-18  124   * XXX This function is a temporary compatibility wrapper - only
752451f0 Linus Torvalds 2012-12-18  125   * needed until the I2C driver can be converted to call
752451f0 Linus Torvalds 2012-12-18  126   * omap_pm_set_max_dev_wakeup_lat() and handle a return code.
752451f0 Linus Torvalds 2012-12-18  127   */
752451f0 Linus Torvalds 2012-12-18  128  static void omap_pm_set_max_mpu_wakeup_lat_compat(struct device *dev, long t)
752451f0 Linus Torvalds 2012-12-18  129  {
752451f0 Linus Torvalds 2012-12-18 @130  	omap_pm_set_max_mpu_wakeup_lat(dev, t);
752451f0 Linus Torvalds 2012-12-18  131  }
752451f0 Linus Torvalds 2012-12-18  132  
3a8761c0 Tony Lindgren  2012-10-08  133  static const char name[] = "omap_i2c";

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