Messages in this thread Patch in this message | | | Date | Tue, 22 Sep 2009 11:10:24 +0530 | From | Arun R Bharadwaj <> | Subject | [v5 RFC PATCH 6/7]: POWER: add a default_idle idle loop for POWER. |
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* Arun R Bharadwaj <arun@linux.vnet.ibm.com> [2009-09-22 11:03:14]:
In arch/powerpc/kernel/idle.c create a default_idle() routine by moving the failover condition of the cpu_idle() idle loop. This is needed by cpuidle infrastructure to call default_idle when other idle routines are not yet registered. Functionality remains the same, but the code is slightly moved around.
Signed-off-by: Arun R Bharadwaj <arun@linux.vnet.ibm.com> --- arch/powerpc/Kconfig | 3 +++ arch/powerpc/include/asm/system.h | 1 + arch/powerpc/kernel/idle.c | 6 ++++++ 3 files changed, 10 insertions(+)
Index: linux.trees.git/arch/powerpc/Kconfig =================================================================== --- linux.trees.git.orig/arch/powerpc/Kconfig +++ linux.trees.git/arch/powerpc/Kconfig @@ -88,6 +88,9 @@ config ARCH_HAS_ILOG2_U64 bool default y if 64BIT +config ARCH_HAS_DEFAULT_IDLE + def_bool y + config GENERIC_HWEIGHT bool default y Index: linux.trees.git/arch/powerpc/include/asm/system.h =================================================================== --- linux.trees.git.orig/arch/powerpc/include/asm/system.h +++ linux.trees.git/arch/powerpc/include/asm/system.h @@ -218,6 +218,7 @@ extern unsigned long klimit; extern void *alloc_maybe_bootmem(size_t size, gfp_t mask); extern void *zalloc_maybe_bootmem(size_t size, gfp_t mask); +extern void default_idle(void); extern int powersave_nap; /* set if nap mode can be used in idle loop */ /* Index: linux.trees.git/arch/powerpc/kernel/idle.c =================================================================== --- linux.trees.git.orig/arch/powerpc/kernel/idle.c +++ linux.trees.git/arch/powerpc/kernel/idle.c @@ -94,6 +94,12 @@ void cpu_idle(void) } } +void default_idle(void) +{ + HMT_low(); + HMT_very_low(); +} + int powersave_nap; #ifdef CONFIG_SYSCTL
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