From 102a0743326a03cd1a1202ceda21e175b7d3575c Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Tue, 20 Feb 2024 01:20:52 +0000
Subject: [PATCH] add new system file
---
kernel/include/linux/stop_machine.h | 31 +++++++++++++++----------------
1 files changed, 15 insertions(+), 16 deletions(-)
diff --git a/kernel/include/linux/stop_machine.h b/kernel/include/linux/stop_machine.h
index ccdaa8f..ddafb3c 100644
--- a/kernel/include/linux/stop_machine.h
+++ b/kernel/include/linux/stop_machine.h
@@ -28,14 +28,27 @@
struct cpu_stop_done *done;
};
+/*
+ * Structure to determine completion condition and record errors. May
+ * be shared by works on different cpus.
+ */
+struct cpu_stop_done {
+ atomic_t nr_todo; /* nr left to execute */
+ int ret; /* collected return value */
+ struct completion completion; /* fired if nr_todo reaches 0 */
+};
+
int stop_one_cpu(unsigned int cpu, cpu_stop_fn_t fn, void *arg);
int stop_two_cpus(unsigned int cpu1, unsigned int cpu2, cpu_stop_fn_t fn, void *arg);
bool 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);
void stop_machine_park(int cpu);
void stop_machine_unpark(int cpu);
+void stop_machine_yield(const struct cpumask *cpumask);
+int stop_one_cpu_async(unsigned int cpu, cpu_stop_fn_t fn, void *arg,
+ struct cpu_stop_work *work_buf,
+ struct cpu_stop_done *done);
+void cpu_stop_work_wait(struct cpu_stop_work *work_buf);
#else /* CONFIG_SMP */
@@ -79,20 +92,6 @@
}
return false;
-}
-
-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 */
--
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