change wifi driver to cypress

hc

2024-01-05 071106ecf68c401173c58808b1cf5f68cc50d390

 kernel/lib/percpu_counter.c
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@@ -17,7 +17,7 @@
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 #ifdef CONFIG_DEBUG_OBJECTS_PERCPU_COUNTER
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-static struct debug_obj_descr percpu_counter_debug_descr;
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+static const struct debug_obj_descr percpu_counter_debug_descr;
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 static bool percpu_counter_fixup_free(void *addr, enum debug_obj_state state)
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 {
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@@ -33,7 +33,7 @@
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 	}
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 }
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-static struct debug_obj_descr percpu_counter_debug_descr = {
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+static const struct debug_obj_descr percpu_counter_debug_descr = {
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 	.name		= "percpu_counter",
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 	.fixup_free	= percpu_counter_fixup_free,
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 };
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@@ -85,7 +85,7 @@
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 	preempt_disable();
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 	count = __this_cpu_read(*fbc->counters) + amount;
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-	if (count >= batch || count <= -batch) {
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+	if (abs(count) >= batch) {
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 		unsigned long flags;
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 		raw_spin_lock_irqsave(&fbc->lock, flags);
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 		fbc->count += count;
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@@ -99,6 +99,25 @@
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 EXPORT_SYMBOL(percpu_counter_add_batch);
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 /*
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+ * For percpu_counter with a big batch, the devication of its count could
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+ * be big, and there is requirement to reduce the deviation, like when the
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+ * counter's batch could be runtime decreased to get a better accuracy,
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+ * which can be achieved by running this sync function on each CPU.
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+ */
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+void percpu_counter_sync(struct percpu_counter *fbc)
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+{
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+	unsigned long flags;
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+	s64 count;
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+
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+	raw_spin_lock_irqsave(&fbc->lock, flags);
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+	count = __this_cpu_read(*fbc->counters);
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+	fbc->count += count;
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+	__this_cpu_sub(*fbc->counters, count);
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+	raw_spin_unlock_irqrestore(&fbc->lock, flags);
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+}
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+EXPORT_SYMBOL(percpu_counter_sync);
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+
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+/*
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  * Add up all the per-cpu counts, return the result.  This is a more accurate
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  * but much slower version of percpu_counter_read_positive()
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  */