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| author | Thomas Gleixner <tglx@linutronix.de> | 2013-03-22 01:49:34 +0400 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2013-04-08 19:39:23 +0400 |
| commit | a1a04ec3c7c27a682473fd9beb2c996316a64649 (patch) | |
| tree | 9075a4b4c001f81283b2a7d5c1668dee134ec81d | |
| parent | 3a98f871ecaf44806e188184332c3fec27c8f08c (diff) | |
| download | linux-a1a04ec3c7c27a682473fd9beb2c996316a64649.tar.xz | |
idle: Provide a generic entry point for the idle code
For now this calls cpu_idle(), but in the long run we want to move the
cpu bringup code to the core and therefor we add a state argument.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: Paul McKenney <paulmck@linux.vnet.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Reviewed-by: Cc: Srivatsa S. Bhat <srivatsa.bhat@linux.vnet.ibm.com>
Cc: Magnus Damm <magnus.damm@gmail.com>
Link: http://lkml.kernel.org/r/20130321215233.583190032@linutronix.de
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
| -rw-r--r-- | include/linux/cpu.h | 8 | ||||
| -rw-r--r-- | init/main.c | 2 | ||||
| -rw-r--r-- | kernel/Makefile | 1 | ||||
| -rw-r--r-- | kernel/cpu/Makefile | 1 | ||||
| -rw-r--r-- | kernel/cpu/idle.c | 10 |
5 files changed, 21 insertions, 1 deletions
diff --git a/include/linux/cpu.h b/include/linux/cpu.h index ce7a074f2519..7419e30c55fb 100644 --- a/include/linux/cpu.h +++ b/include/linux/cpu.h @@ -212,4 +212,12 @@ static inline int disable_nonboot_cpus(void) { return 0; } static inline void enable_nonboot_cpus(void) {} #endif /* !CONFIG_PM_SLEEP_SMP */ +enum cpuhp_state { + CPUHP_OFFLINE, + CPUHP_ONLINE, +}; + +void cpu_startup_entry(enum cpuhp_state state); +void cpu_idle(void); + #endif /* _LINUX_CPU_H_ */ diff --git a/init/main.c b/init/main.c index 63534a141b4e..adb179d3e0f8 100644 --- a/init/main.c +++ b/init/main.c @@ -384,7 +384,7 @@ static noinline void __init_refok rest_init(void) init_idle_bootup_task(current); schedule_preempt_disabled(); /* Call into cpu_idle with preempt disabled */ - cpu_idle(); + cpu_startup_entry(CPUHP_ONLINE); } /* Check for early params. */ diff --git a/kernel/Makefile b/kernel/Makefile index bbde5f1a4486..d1574d47cf27 100644 --- a/kernel/Makefile +++ b/kernel/Makefile @@ -24,6 +24,7 @@ endif obj-y += sched/ obj-y += power/ +obj-y += cpu/ obj-$(CONFIG_CHECKPOINT_RESTORE) += kcmp.o obj-$(CONFIG_FREEZER) += freezer.o diff --git a/kernel/cpu/Makefile b/kernel/cpu/Makefile new file mode 100644 index 000000000000..59ab052ef7a0 --- /dev/null +++ b/kernel/cpu/Makefile @@ -0,0 +1 @@ +obj-y = idle.o diff --git a/kernel/cpu/idle.c b/kernel/cpu/idle.c new file mode 100644 index 000000000000..1908f00e0e98 --- /dev/null +++ b/kernel/cpu/idle.c @@ -0,0 +1,10 @@ +/* + * Generic entry point for the idle threads + */ +#include <linux/sched.h> +#include <linux/cpu.h> + +void cpu_startup_entry(enum cpuhp_state state) +{ + cpu_idle(); +} |