On Thursday 29 November 2012 03:34 AM, Jon Hunter wrote:

When compiling the kernel with configuration options ...

  # CONFIG_ARCH_OMAP2 is not set
  # CONFIG_ARCH_OMAP3 is not set
  # CONFIG_ARCH_OMAP4 is not set
  # CONFIG_SOC_OMAP5 is not set
  CONFIG_SOC_AM33XX=y

  ... the following build warning is seen.

   CC      arch/arm/mach-omap2/timer.o
   arch/arm/mach-omap2/timer.c:395:19: warning: ?omap2_sync32k_clocksource_init?
   	defined but not used [-Wunused-function]

This issue was introduced by commit 6f80b3b (ARM: OMAP2+: timer: remove
CONFIG_OMAP_32K_TIMER) where the omap2_sync32k_clocksource_init() is no
longer referenced by the timer initialisation function for the AM335x
device as it has no 32k-sync timer.

Fix this by adding the "__maybe_unused" compiler directive to the
omap2_sync32k_clocksource_init() function to indicate that this function
may be used for certain configurations.

Cc: Igor Grinberg <redacted>

Signed-off-by: Jon Hunter <redacted>
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Acked-by: Santosh Shilimkar <redacted>