Merge tag 'sched-core-2020-06-02' of git://git.kernel.org/pub/scm/linux/kernel/git...

[thirdparty/linux.git] / include / linux / smp.h

diff --git a/include/linux/smp.h b/include/linux/smp.h
index 04019872c7bcef823b29645509346f19466463fc..7ee202ad21a61438ca481056058e446583619724 100644 (file)
--- a/include/linux/smp.h
+++ b/include/linux/smp.h
@@ -16,17 +16,39 @@
 
 typedef void (*smp_call_func_t)(void *info);
 typedef bool (*smp_cond_func_t)(int cpu, void *info);
+
+enum {
+       CSD_FLAG_LOCK           = 0x01,
+
+       /* IRQ_WORK_flags */
+
+       CSD_TYPE_ASYNC          = 0x00,
+       CSD_TYPE_SYNC           = 0x10,
+       CSD_TYPE_IRQ_WORK       = 0x20,
+       CSD_TYPE_TTWU           = 0x30,
+       CSD_FLAG_TYPE_MASK      = 0xF0,
+};
+
+/*
+ * structure shares (partial) layout with struct irq_work
+ */
 struct __call_single_data {
        struct llist_node llist;
+       unsigned int flags;
        smp_call_func_t func;
        void *info;
-       unsigned int flags;
 };
 
 /* Use __aligned() to avoid to use 2 cache lines for 1 csd */
 typedef struct __call_single_data call_single_data_t
        __aligned(sizeof(struct __call_single_data));
 
+/*
+ * Enqueue a llist_node on the call_single_queue; be very careful, read
+ * flush_smp_call_function_queue() in detail.
+ */
+extern void __smp_call_single_queue(int cpu, struct llist_node *node);
+
 /* total number of cpus in this system (may exceed NR_CPUS) */
 extern unsigned int total_cpus;