arch/arm/mach-omap2/i2c.c:130:2: error: implicit declaration of function 'omap_pm_set_max_mpu_wakeup_lat'

arch/arm/mach-omap2/i2c.c:130:2: error: implicit declaration of function 'omap_pm_set_max_mpu_wakeup_lat'

[Fengguang Wu]

[add more CC]

On Wed, Dec 19, 2012 at 10:11:02AM +0800, Fengguang Wu wrote:
> Hi Linus, Wolfram,
> 
> FYI, kernel build failed on
> 
> tree:   git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux master
> head:   752451f01c4567b506bf4343082682dbb8fb30dd
> commit: 752451f01c4567b506bf4343082682dbb8fb30dd Merge branch 'i2c-embedded/for-next' of git://git.pengutronix.de/git/wsa/linux
> 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

arch/arm/mach-omap2/i2c.c:130:2: error: implicit declaration of function 'omap_pm_set_max_mpu_wakeup_lat'

[Bedia, Vaibhav]

On Wed, Dec 19, 2012 at 07:52:47, Fengguang Wu wrote:
> [add more CC]
> 
> On Wed, Dec 19, 2012 at 10:11:02AM +0800, Fengguang Wu wrote:
> > Hi Linus, Wolfram,
> > 
> > FYI, kernel build failed on
> > 
> > tree:   git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux master
> > head:   752451f01c4567b506bf4343082682dbb8fb30dd
> > commit: 752451f01c4567b506bf4343082682dbb8fb30dd Merge branch 'i2c-embedded/for-next' of git://git.pengutronix.de/git/wsa/linux
> > 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).

CONFIG_OMAP_PM_NOOP is defined. The build breakage is due to a missing header inclusion.
I just sent a patch for this [1]

There are still a couple of patches missing before omap2plus_defconfig compiles
https://patchwork.kernel.org/patch/1810481/
https://patchwork.kernel.org/patch/1810441/

I guess they are on the way from some other tree.

Regards,
Vaibhav

[1] http://marc.info/?l=linux-arm-kernel&m=135589966017628&w=2