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authorSrikant Patnaik2015-01-11 12:28:04 +0530
committerSrikant Patnaik2015-01-11 12:28:04 +0530
commit871480933a1c28f8a9fed4c4d34d06c439a7a422 (patch)
tree8718f573808810c2a1e8cb8fb6ac469093ca2784 /ANDROID_3.4.5/include/linux/stop_machine.h
parent9d40ac5867b9aefe0722bc1f110b965ff294d30d (diff)
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Moved, renamed, and deleted files
The original directory structure was scattered and unorganized. Changes are basically to make it look like kernel structure.
Diffstat (limited to 'ANDROID_3.4.5/include/linux/stop_machine.h')
-rw-r--r--ANDROID_3.4.5/include/linux/stop_machine.h156
1 files changed, 0 insertions, 156 deletions
diff --git a/ANDROID_3.4.5/include/linux/stop_machine.h b/ANDROID_3.4.5/include/linux/stop_machine.h
deleted file mode 100644
index 3b5e910d..00000000
--- a/ANDROID_3.4.5/include/linux/stop_machine.h
+++ /dev/null
@@ -1,156 +0,0 @@
-#ifndef _LINUX_STOP_MACHINE
-#define _LINUX_STOP_MACHINE
-
-#include <linux/cpu.h>
-#include <linux/cpumask.h>
-#include <linux/smp.h>
-#include <linux/list.h>
-
-/*
- * stop_cpu[s]() is simplistic per-cpu maximum priority cpu
- * monopolization mechanism. The caller can specify a non-sleeping
- * function to be executed on a single or multiple cpus preempting all
- * other processes and monopolizing those cpus until it finishes.
- *
- * Resources for this mechanism are preallocated when a cpu is brought
- * up and requests are guaranteed to be served as long as the target
- * cpus are online.
- */
-typedef int (*cpu_stop_fn_t)(void *arg);
-
-#ifdef CONFIG_SMP
-
-struct cpu_stop_work {
- struct list_head list; /* cpu_stopper->works */
- cpu_stop_fn_t fn;
- void *arg;
- struct cpu_stop_done *done;
-};
-
-int stop_one_cpu(unsigned int cpu, cpu_stop_fn_t fn, void *arg);
-void stop_one_cpu_nowait(unsigned int cpu, cpu_stop_fn_t fn, void *arg,
- struct cpu_stop_work *work_buf);
-int stop_cpus(const struct cpumask *cpumask, cpu_stop_fn_t fn, void *arg);
-int try_stop_cpus(const struct cpumask *cpumask, cpu_stop_fn_t fn, void *arg);
-
-#else /* CONFIG_SMP */
-
-#include <linux/workqueue.h>
-
-struct cpu_stop_work {
- struct work_struct work;
- cpu_stop_fn_t fn;
- void *arg;
-};
-
-static inline int stop_one_cpu(unsigned int cpu, cpu_stop_fn_t fn, void *arg)
-{
- int ret = -ENOENT;
- preempt_disable();
- if (cpu == smp_processor_id())
- ret = fn(arg);
- preempt_enable();
- return ret;
-}
-
-static void stop_one_cpu_nowait_workfn(struct work_struct *work)
-{
- struct cpu_stop_work *stwork =
- container_of(work, struct cpu_stop_work, work);
- preempt_disable();
- stwork->fn(stwork->arg);
- preempt_enable();
-}
-
-static inline void stop_one_cpu_nowait(unsigned int cpu,
- cpu_stop_fn_t fn, void *arg,
- struct cpu_stop_work *work_buf)
-{
- if (cpu == smp_processor_id()) {
- INIT_WORK(&work_buf->work, stop_one_cpu_nowait_workfn);
- work_buf->fn = fn;
- work_buf->arg = arg;
- schedule_work(&work_buf->work);
- }
-}
-
-static inline int stop_cpus(const struct cpumask *cpumask,
- cpu_stop_fn_t fn, void *arg)
-{
- if (cpumask_test_cpu(raw_smp_processor_id(), cpumask))
- return stop_one_cpu(raw_smp_processor_id(), fn, arg);
- return -ENOENT;
-}
-
-static inline int try_stop_cpus(const struct cpumask *cpumask,
- cpu_stop_fn_t fn, void *arg)
-{
- return stop_cpus(cpumask, fn, arg);
-}
-
-#endif /* CONFIG_SMP */
-
-/*
- * stop_machine "Bogolock": stop the entire machine, disable
- * interrupts. This is a very heavy lock, which is equivalent to
- * grabbing every spinlock (and more). So the "read" side to such a
- * lock is anything which disables preemption.
- */
-#if defined(CONFIG_STOP_MACHINE) && defined(CONFIG_SMP)
-
-/**
- * stop_machine: freeze the machine on all CPUs and run this function
- * @fn: the function to run
- * @data: the data ptr for the @fn()
- * @cpus: the cpus to run the @fn() on (NULL = any online cpu)
- *
- * Description: This causes a thread to be scheduled on every cpu,
- * each of which disables interrupts. The result is that no one is
- * holding a spinlock or inside any other preempt-disabled region when
- * @fn() runs.
- *
- * This can be thought of as a very heavy write lock, equivalent to
- * grabbing every spinlock in the kernel. */
-int stop_machine(int (*fn)(void *), void *data, const struct cpumask *cpus);
-
-/**
- * __stop_machine: freeze the machine on all CPUs and run this function
- * @fn: the function to run
- * @data: the data ptr for the @fn
- * @cpus: the cpus to run the @fn() on (NULL = any online cpu)
- *
- * Description: This is a special version of the above, which assumes cpus
- * won't come or go while it's being called. Used by hotplug cpu.
- */
-int __stop_machine(int (*fn)(void *), void *data, const struct cpumask *cpus);
-
-int stop_machine_from_inactive_cpu(int (*fn)(void *), void *data,
- const struct cpumask *cpus);
-
-#else /* CONFIG_STOP_MACHINE && CONFIG_SMP */
-
-static inline int __stop_machine(int (*fn)(void *), void *data,
- const struct cpumask *cpus)
-{
- unsigned long flags;
- int ret;
- local_irq_save(flags);
- ret = fn(data);
- local_irq_restore(flags);
- return ret;
-}
-
-static inline int stop_machine(int (*fn)(void *), void *data,
- const struct cpumask *cpus)
-{
- return __stop_machine(fn, data, cpus);
-}
-
-static inline int stop_machine_from_inactive_cpu(int (*fn)(void *), void *data,
- const struct cpumask *cpus)
-{
- return __stop_machine(fn, data, cpus);
-}
-
-#endif /* CONFIG_STOP_MACHINE && CONFIG_SMP */
-#endif /* _LINUX_STOP_MACHINE */