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cpuidle: build fix for non-x86

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The last posted version of this patch gave compile error
on IA64. So, here goes yet another rewrite of the patch.

Convert cpu_idle_wait() to cpuidle_kick_cpus() which is
SMP-only, and gives error on non supported CPU.

Changes from last patch sent by Kevin:
Moved the definition of kick_cpus back to cpuidle.c from cpuidle.h:
* Having it in .h gives #error on archs which includes the header file without
  actually having CPU_IDLE configured. To make it work in .h, we need one more
  #ifdef around that code which makes it messy.
* Also, the function is only called from one file. So, it can be in declared
  statically in .c rather than making it available to everyone who includes
  the .h file.

Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Signed-off-by: Kevin Hilman <khilman@mvista.com>
Signed-off-by: Len Brown <len.brown@intel.com>
This commit is contained in:
Venki Pallipadi 2008-02-08 17:05:44 -08:00 committed by Len Brown
parent b1d0e4f535
commit a6869cc4cf
2 changed files with 15 additions and 1 deletions
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3
arch/x86/Kconfig
View file

@ -102,6 +102,9 @@ config ARCH_HAS_ILOG2_U32
config ARCH_HAS_ILOG2_U64
def_bool n
config ARCH_HAS_CPU_IDLE_WAIT
def_bool y
config GENERIC_CALIBRATE_DELAY
def_bool y

13
drivers/cpuidle/cpuidle.c
View file

@ -27,6 +27,17 @@ static void (*pm_idle_old)(void);
static int enabled_devices;
#if defined(CONFIG_ARCH_HAS_CPU_IDLE_WAIT)
static void cpuidle_kick_cpus(void)
{
cpu_idle_wait();
}
#elif defined(CONFIG_SMP)
# error "Arch needs cpu_idle_wait() equivalent here"
#else /* !CONFIG_ARCH_HAS_CPU_IDLE_WAIT && !CONFIG_SMP */
static void cpuidle_kick_cpus(void) {}
#endif
/**
* cpuidle_idle_call - the main idle loop
*
@ -83,7 +94,7 @@ void cpuidle_uninstall_idle_handler(void)
{
if (enabled_devices && (pm_idle != pm_idle_old)) {
pm_idle = pm_idle_old;
cpu_idle_wait();
cpuidle_kick_cpus();
}
}